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Full-Text Articles in Physical Sciences and Mathematics
The Sophie Search For Northern Extrasolar Planets Xiv. A Temperate (Teq ~ 300 K) Super-Earth Around The Nearby Star Gliese 411, R. F. Díaz, Xavier Delfosse, Melissa J. Hobson, Isabelle Boisse, Nicola Astudillo-Defru, Xavier Bonfils, Gregory W. Henry, Luc Arnold, François Bouchy, Vincent Bourrier, Bastien Brugger, Shweta Dalal, Magali Deleuil, Olivier Demangeon, F. Dolon, Xavier Dumusque, Thierry Forveille, Nathan Hara, Guillaume Hébrard, Flavien Kiefer, Théodore Lopez, Lucile Mignon, F. Moreau, Olivier Mousis, C. Moutou, Francesco Pepe, S. Perruchot, Y. Richaud, Alexandre Santerne, Nuno Santos, R. Sottile, Manu Stalport, Damien Ségransan, Stéphane Udry, N. Unger, Paul A. Wilson
The Sophie Search For Northern Extrasolar Planets Xiv. A Temperate (Teq ~ 300 K) Super-Earth Around The Nearby Star Gliese 411, R. F. Díaz, Xavier Delfosse, Melissa J. Hobson, Isabelle Boisse, Nicola Astudillo-Defru, Xavier Bonfils, Gregory W. Henry, Luc Arnold, François Bouchy, Vincent Bourrier, Bastien Brugger, Shweta Dalal, Magali Deleuil, Olivier Demangeon, F. Dolon, Xavier Dumusque, Thierry Forveille, Nathan Hara, Guillaume Hébrard, Flavien Kiefer, Théodore Lopez, Lucile Mignon, F. Moreau, Olivier Mousis, C. Moutou, Francesco Pepe, S. Perruchot, Y. Richaud, Alexandre Santerne, Nuno Santos, R. Sottile, Manu Stalport, Damien Ségransan, Stéphane Udry, N. Unger, Paul A. Wilson
Information Systems and Engineering Management Research Publications
Periodic radial velocity variations in the nearby M-dwarf star Gl 411 are reported, based on measurements with the SOPHIE spectrograph. Current data do not allow us to distinguish between a 12.95-day period and its one-day alias at 1.08 days, but favour the former slightly. The velocity variation has an amplitude of 1.6 m s−1, making this the lowest-amplitude signal detected with SOPHIE up to now. We have performed a detailed analysis of the significance of the signal and its origin, including extensive simulations with both uncorrelated and correlated noise, representing the signal induced by stellar activity. The signal is significantly …
An Hst/Stis Optical Transmission Spectrum Of Warm Neptune Gj 436b, Joshua D. Lothringer, Björn Benneke, Ian J. M. Crossfield, Gregory W. Henry, Caroline Morley, Diana Dragomir, Travis Barman, Heather Knutson, Eliza Kempton, Jonathan J. Fortney, Peter Mccullough, Andrew W. Howard
An Hst/Stis Optical Transmission Spectrum Of Warm Neptune Gj 436b, Joshua D. Lothringer, Björn Benneke, Ian J. M. Crossfield, Gregory W. Henry, Caroline Morley, Diana Dragomir, Travis Barman, Heather Knutson, Eliza Kempton, Jonathan J. Fortney, Peter Mccullough, Andrew W. Howard
Information Systems and Engineering Management Research Publications
GJ 436b is a prime target for understanding warm Neptune exoplanet atmospheres and a target for multiple James Webb Space Telescope (JWST) Guaranteed Time Observation programs. Here, we report the first space-based optical transmission spectrum of the planet using two Hubble Space Telescope (HST) Space Telescope Imaging Spectrograph (STIS) transit observations from 0.53 to 1.03 μm. We find no evidence for alkali absorption features, nor evidence of a scattering slope longward of 0.53 μm. The spectrum is indicative of moderate to high metallicity (∼100–1000× solar), while moderate-metallicity scenarios (∼100× solar) require aerosol opacity. The optical spectrum also rules out some …
The Discovery And Mass Measurement Of A New Ultra-Short-Period Planet: K2-131b, Fei Dai, Joshua N. Winn, Davide Gandolfi, Sharon X. Wang, Johanna K. Teske, Jennifer Burt, Simon Albrecht, Oscar Barragán, William D. Cochran, Michael Endl, Malcolm Fridlund, Artie P. Hatzes, Teruyuki Hirano, Lea A. Hirsch, Marshall C. Johnson, Anders Bo Justesen, John Livingston, Carina M. Persson, Jorge Prieto-Arranz, Andrew Vanderburg, Roi Alonso, Giuliano Antoniciello, Pamela Arriagada, R. Paul Butler, Juan Cabrera, Jeffrey D. Crane, Felice Cusano, Szilárd Csizmadia, Hans Deeg, Sergio B. Dieterich, Philipp Eigmüller, Anders Erikson, Mark E. Everett, Akihiko Fukui, Sascha Grziwa, Eike W. Guenther, Gregory W. Henry, Steve B. Howell, John Asher Johnson, Judith Korth, Masayuki Kuzuhara, Norio Narita, David Nespral, Grzegorz Nowak, Enric Palle, Martin Pätzold, Heike Rauer, Pilar Montañés Rodríguez, Stephen A. Shectman, Alexis M. S. Smith, Ian B. Thompson, Vincent Van Eylen, Michael W. Williamson, Robert A. Wittenmyer
The Discovery And Mass Measurement Of A New Ultra-Short-Period Planet: K2-131b, Fei Dai, Joshua N. Winn, Davide Gandolfi, Sharon X. Wang, Johanna K. Teske, Jennifer Burt, Simon Albrecht, Oscar Barragán, William D. Cochran, Michael Endl, Malcolm Fridlund, Artie P. Hatzes, Teruyuki Hirano, Lea A. Hirsch, Marshall C. Johnson, Anders Bo Justesen, John Livingston, Carina M. Persson, Jorge Prieto-Arranz, Andrew Vanderburg, Roi Alonso, Giuliano Antoniciello, Pamela Arriagada, R. Paul Butler, Juan Cabrera, Jeffrey D. Crane, Felice Cusano, Szilárd Csizmadia, Hans Deeg, Sergio B. Dieterich, Philipp Eigmüller, Anders Erikson, Mark E. Everett, Akihiko Fukui, Sascha Grziwa, Eike W. Guenther, Gregory W. Henry, Steve B. Howell, John Asher Johnson, Judith Korth, Masayuki Kuzuhara, Norio Narita, David Nespral, Grzegorz Nowak, Enric Palle, Martin Pätzold, Heike Rauer, Pilar Montañés Rodríguez, Stephen A. Shectman, Alexis M. S. Smith, Ian B. Thompson, Vincent Van Eylen, Michael W. Williamson, Robert A. Wittenmyer
Information Systems and Engineering Management Research Publications
We report the discovery of a new ultra-short-period planet and summarize the properties of all such planets for which the mass and radius have been measured. The new planet, K2-131b, was discovered in K2 Campaign 10. It has a radius of ${1.81}_{-0.12}^{+0.16}\,{R}_{\oplus }$ and orbits a G dwarf with a period of 8.9 hr. Radial velocities obtained with Magellan/PFS and TNG/HARPS-N show evidence for stellar activity along with orbital motion. We determined the planetary mass using two different methods: (1) the "floating chunk offset" method, based only on changes in velocity observed on the same night; and (2) a Gaussian …
Three Temperate Neptunes Orbiting Nearby Stars, Benjamin J. Fulton, Andrew W. Howard, Lauren M. Weiss, Evan Sinukoff, Erik A. Petigura, Howard Isaacson, Lea A. Hirsch, Geoffrey W. Marcy, Gregory W. Henry, Samuel K. Grunblatt, Daniel Huber, Kaspar Von Braun, Tabetha S. Boyajian, Stephen R. Kane, Justin Wittrock, Elliott P. Horch, David R. Ciardi, Steve B. Howell, Jason T. Wright, Eric B. Ford
Three Temperate Neptunes Orbiting Nearby Stars, Benjamin J. Fulton, Andrew W. Howard, Lauren M. Weiss, Evan Sinukoff, Erik A. Petigura, Howard Isaacson, Lea A. Hirsch, Geoffrey W. Marcy, Gregory W. Henry, Samuel K. Grunblatt, Daniel Huber, Kaspar Von Braun, Tabetha S. Boyajian, Stephen R. Kane, Justin Wittrock, Elliott P. Horch, David R. Ciardi, Steve B. Howell, Jason T. Wright, Eric B. Ford
Information Systems and Engineering Management Research Publications
We present the discovery of three modestly irradiated, roughly Neptune-mass planets orbiting three nearby Solar-type stars. HD 42618 b has a minimum mass of 15.4 ± 2.4 ${M}_{\oplus }$, a semimajor axis of 0.55 au, an equilibrium temperature of 337 K, and is the first planet discovered to orbit the solar analogue host star, HD 42618. We also discover new planets orbiting the known exoplanet host stars HD 164922 and HD 143761 (ρ CrB). The new planet orbiting HD 164922 has a minimum mass of 12.9 ± 1.6 ${M}_{\oplus }$ and orbits interior to the previously known Jovian mass planet …
Very Low-Mass Stellar And Substellar Companions To Solar-Like Stars From Marvels. Vi. A Giant Planet And A Brown Dwarf Candidate In A Close Binary System Hd 87646, Bo Ma, Jian Ge, Alex Wolszczan, Matthew W. Muterspaugh, Brian Lee, Gregory W. Henry, Donald P. Schneider, Eduardo L. Martín, Andrzej Niedzielski, Jiwei Xie, Scott W. Fleming, Neil Thomas, Michael Williamson, Zhaohuan Zhu, Eric Agol, Dmitry Bizyaev, Luiz Nicolaci Da Costa, Peng Jiang, Aldo Fabricio Martinez Fiorenzano, Jonay I. González Hernández, Pengcheng Guo, Nolan Grieves, Rui Li, Jane Liu, Suvrath Mahadevan, Tsevi Mazeh, Duy Cuong Nguyen, Martin Paegert, Sirinrat Sithajan, Keivan Stassun, Sivarani Thirupathi, Julian C. Van Eyken, Xiaoke Wan, Ji Wang, John P. Wisniewski, Bo Zhao, Shay Zucker
Very Low-Mass Stellar And Substellar Companions To Solar-Like Stars From Marvels. Vi. A Giant Planet And A Brown Dwarf Candidate In A Close Binary System Hd 87646, Bo Ma, Jian Ge, Alex Wolszczan, Matthew W. Muterspaugh, Brian Lee, Gregory W. Henry, Donald P. Schneider, Eduardo L. Martín, Andrzej Niedzielski, Jiwei Xie, Scott W. Fleming, Neil Thomas, Michael Williamson, Zhaohuan Zhu, Eric Agol, Dmitry Bizyaev, Luiz Nicolaci Da Costa, Peng Jiang, Aldo Fabricio Martinez Fiorenzano, Jonay I. González Hernández, Pengcheng Guo, Nolan Grieves, Rui Li, Jane Liu, Suvrath Mahadevan, Tsevi Mazeh, Duy Cuong Nguyen, Martin Paegert, Sirinrat Sithajan, Keivan Stassun, Sivarani Thirupathi, Julian C. Van Eyken, Xiaoke Wan, Ji Wang, John P. Wisniewski, Bo Zhao, Shay Zucker
Information Systems and Engineering Management Research Publications
We report the detections of a giant planet (MARVELS-7b) and a brown dwarf (BD) candidate (MARVELS-7c) around the primary star in the close binary system, HD 87646. To the best of our knowledge, it is the first close binary system with more than one substellar circumprimary companion that has been discovered. The detection of this giant planet was accomplished using the first multi-object Doppler instrument (KeckET) at the Sloan Digital Sky Survey (SDSS) telescope. Subsequent radial velocity observations using the Exoplanet Tracker at the Kitt Peak National Observatory, the High Resolution Spectrograph at the Hobby Eberley telescope, the "Classic" spectrograph …
Hst Hot-Jupiter Transmission Spectral Survey: Clear Skies For Cool Saturn Wasp-39b, Patrick D. Fischer, Heather Knutson, David K. Sing, Gregory W. Henry, Michael H. Williamson, Jonathan J. Fortney, Adam S. Burrows, Tiffany Kataria, Nikolay Nikolov, Adam P. Showman, Gilda E. Ballester, Jean-Michel Désert, Suzanne Aigrain, Drake Deming, Alain Lecavelier Des Etangs, Alfred Vidal-Madjar
Hst Hot-Jupiter Transmission Spectral Survey: Clear Skies For Cool Saturn Wasp-39b, Patrick D. Fischer, Heather Knutson, David K. Sing, Gregory W. Henry, Michael H. Williamson, Jonathan J. Fortney, Adam S. Burrows, Tiffany Kataria, Nikolay Nikolov, Adam P. Showman, Gilda E. Ballester, Jean-Michel Désert, Suzanne Aigrain, Drake Deming, Alain Lecavelier Des Etangs, Alfred Vidal-Madjar
Information Systems and Engineering Management Research Publications
We present the Hubble Space Telescope (HST) Space Telescope Imaging Spectrograph (STIS) optical transmission spectroscopy of the cool Saturn-mass exoplanet WASP-39b from 0.29-1.025 μm, along with complementary transit observations from Spitzer IRAC at 3.6 and 4.5 μm. The low density and large atmospheric pressure scale height of WASP-39b make it particularly amenable to atmospheric characterization using this technique. We detect a Rayleigh scattering slope as well as sodium and potassium absorption features; this is the first exoplanet in which both alkali features are clearly detected with the extended wings predicted by cloud-free atmosphere models. The full transmission spectrum is well …
A Combined Spectroscopic And Photometric Stellar Activity Study Of Epsilon Eridani, Matthew J. Giguere, Debra A. Fischer, Cyril X. Y. Zhang, Jaymie M. Matthews, Chris Cameron, Gregory W. Henry
A Combined Spectroscopic And Photometric Stellar Activity Study Of Epsilon Eridani, Matthew J. Giguere, Debra A. Fischer, Cyril X. Y. Zhang, Jaymie M. Matthews, Chris Cameron, Gregory W. Henry
Information Systems and Engineering Management Research Publications
We present simultaneous ground-based radial velocity (RV) measurements and space-based photometric measurements of the young and active K dwarf Epsilon Eridani. These measurements provide a data set for exploring methods of identifying and ultimately distinguishing stellar photospheric velocities from Keplerian motion. We compare three methods we have used in exploring this data set: Dalmatian, an MCMC spot modeling code that fits photometric and RV measurements simultaneously; the FF' method, which uses photometric measurements to predict the stellar activity signal in simultaneous RV measurements; and Hα analysis. We show that our Hα measurements are strongly correlated with the Microvariability and Oscillations …
Evidence For Reflected Light From The Most Eccentric Exoplanet Known, Stephen R. Kane, Robert A. Wittenmyer, Natalie R. Hinkel, Arpita Roy, Suvrath Mahadevan, Diana Dragomir, Jaymie M. Matthews, Gregory W. Henry, Abhijit Chakraborty, Tabetha S. Boyajian
Evidence For Reflected Light From The Most Eccentric Exoplanet Known, Stephen R. Kane, Robert A. Wittenmyer, Natalie R. Hinkel, Arpita Roy, Suvrath Mahadevan, Diana Dragomir, Jaymie M. Matthews, Gregory W. Henry, Abhijit Chakraborty, Tabetha S. Boyajian
Information Systems and Engineering Management Research Publications
Planets in highly eccentric orbits form a class of objects not seen within our solar system. The most extreme case known among these objects is the planet orbiting HD 20782, with an orbital period of 597 days and an eccentricity of 0.96. Here we present new data and analysis for this system as part of the Transit Ephemeris Refinement and Monitoring Survey. We obtained CHIRON spectra to perform an independent estimation of the fundamental stellar parameters. New radial velocities from Anglo-Australian Telescope and PARAS observations during periastron passage greatly improve our knowledge of the eccentric nature of the orbit. The …
Stellar Activity And Exclusion Of The Outer Planet In The Hd 99492 System, Stephen R. Kane, Badrinath Thirumalachari, Gregory W. Henry, Natalie R. Hinkel, Eric L. N. Jensen, Tabetha S. Boyajian, Debra A. Fischer, Andrew W. Howard, Howard Isaacson, Jason T. Wright
Stellar Activity And Exclusion Of The Outer Planet In The Hd 99492 System, Stephen R. Kane, Badrinath Thirumalachari, Gregory W. Henry, Natalie R. Hinkel, Eric L. N. Jensen, Tabetha S. Boyajian, Debra A. Fischer, Andrew W. Howard, Howard Isaacson, Jason T. Wright
Information Systems and Engineering Management Research Publications
A historical problem for indirect exoplanet detection has been contending with the intrinsic variability of the host star. If the variability is periodic, it can easily mimic various exoplanet signatures, such as radial velocity (RV) variations that originate with the stellar surface rather than the presence of a planet. Here we present an update for the HD 99492 planetary system, using new RV and photometric measurements from the Transit Ephemeris Refinement and Monitoring Survey. Our extended time series and subsequent analyses of the Ca ii H&K emission lines show that the host star has an activity cycle of ∼13 years. …
Six Planets Orbiting Hd 219134, Steve Vogt, Jennifer Burt, Stefano Meschiari, R. Paul Butler, Gregory W. Henry, Songhu Wang, Brad Holden, Cyril Gapp, Russell Hanson, Pamela Arriagada, Sandy Keiser, Johanna Teske, Gregory Laughlin
Six Planets Orbiting Hd 219134, Steve Vogt, Jennifer Burt, Stefano Meschiari, R. Paul Butler, Gregory W. Henry, Songhu Wang, Brad Holden, Cyril Gapp, Russell Hanson, Pamela Arriagada, Sandy Keiser, Johanna Teske, Gregory Laughlin
Information Systems and Engineering Management Research Publications
We present new, high-precision Doppler radial velocity (RV) data sets for the nearby K3V star HD 219134. The data include 175 velocities obtained with the HIRES Spectrograph at the Keck I Telescope and 101 velocities obtained with the Levy Spectrograph at the Automated Planet Finder Telescope at Lick Observatory. Our observations reveal six new planetary candidates, with orbital periods of P = 3.1, 6.8, 22.8, 46.7, 94.2, and 2247 days, spanning masses of ${\mathcal{M}}\mathrm{sin}i=3.8,$ 3.5, 8.9, 21.3, 10.8, and $108\;{{\mathcal{M}}}_{\oplus }$, respectively. Our analysis indicates that the outermost signal is unlikely to be an artifact induced by stellar activity. In …
A Comprehensive Characterization Of The 70 Virginis Planetary System, Stephen R. Kane, Tabetha S. Boyajian, Gregory W. Henry, Y. Katherina Feng, Natalie R. Hinkel, Debra A. Fischer, Kaspar Von Braun, Andrew W. Howard, Jason T. Wright
A Comprehensive Characterization Of The 70 Virginis Planetary System, Stephen R. Kane, Tabetha S. Boyajian, Gregory W. Henry, Y. Katherina Feng, Natalie R. Hinkel, Debra A. Fischer, Kaspar Von Braun, Andrew W. Howard, Jason T. Wright
Information Systems and Engineering Management Research Publications
An on-going effort in the characterization of exoplanetary systems is the accurate determination of host star properties. This effort extends to the relatively bright host stars of planets discovered with the radial velocity method. The Transit Ephemeris Refinement and Monitoring Survey (TERMS) is aiding in these efforts as part of its observational campaign for exoplanet host stars. One of the first known systems is that of 70 Virginis, which harbors a jovian planet in an eccentric orbit. Here we present a complete characterization of this system with a compilation of TERMS photometry, spectroscopy, and interferometry. We provide fundamental properties of …
Three Super-Earths Orbiting Hd 7924, Benjamin J. Fulton, Lauren M. Weiss, Evan Sinukoff, Howard Isaacson, Andrew W. Howard, Geoffrey W. Marcy, Gregory W. Henry, Bradford P. Holden, Robert I. Kibrick
Three Super-Earths Orbiting Hd 7924, Benjamin J. Fulton, Lauren M. Weiss, Evan Sinukoff, Howard Isaacson, Andrew W. Howard, Geoffrey W. Marcy, Gregory W. Henry, Bradford P. Holden, Robert I. Kibrick
Information Systems and Engineering Management Research Publications
We report the discovery of two super-Earth-mass planets orbiting the nearby K0.5 dwarf HD 7924, which was previously known to host one small planet. The new companions have masses of 7.9 and 6.4 ${{M}_{\oplus }}$, and orbital periods of 15.3 and 24.5 days. We perform a joint analysis of high-precision radial velocity data from Keck/HIRES and the new Automated Planet Finder Telescope (APF) to robustly detect three total planets in the system. We refine the ephemeris of the previously known planet using 5 yr of new Keck data and high-cadence observations over the last 1.3 yr with the APF. With …
Refined Properties Of The Hd 130322 Planetary System, Natalie R. Hinkel, Stephen R. Kane, Gregory W. Henry, Y. Katherina Feng, Tabetha Boyajian, Jason Wright, Debra A. Fischer, Andrew W. Howard
Refined Properties Of The Hd 130322 Planetary System, Natalie R. Hinkel, Stephen R. Kane, Gregory W. Henry, Y. Katherina Feng, Tabetha Boyajian, Jason Wright, Debra A. Fischer, Andrew W. Howard
Information Systems and Engineering Management Research Publications
Exoplanetary systems closest to the Sun, with the brightest host stars, provide the most favorable opportunities for characterization studies of the host star and their planet(s). The Transit Ephemeris Refinement and Monitoring Survey uses both new radial velocity (RV) measurements and photometry in order to greatly improve planetary orbit uncertainties and the fundamental properties of the star, in this case HD 130322. The only companion, HD 130322b, orbits in a relatively circular orbit, e = 0.029 every ∼10.7 days. We have compiled RV measurements from multiple sources, including 12 unpublished from the Keck I telescope, over the course of ∼14 …
Hst Hot-Jupiter Transmission Spectral Survey: Detection Of Potassium In Wasp-31b Along With A Cloud Deck And Rayleigh Scattering, David K. Sing, Hannah R. Wakeford, Adam P. Showman, Nikolay Nikolov, Jonathan J. Fortney, Adam Burrows, Gilda E. Ballester, Drake Deming, Suzanne Aigrain, Jean-Michel Désert, Neale P. Gibson, Gregory W. Henry, Heather Knutson, Alain Lecavelier Des Etangs, Frederic Pont, Alfred Vidal-Madjar, Michael H. Williamson, Paul A. Wilson
Hst Hot-Jupiter Transmission Spectral Survey: Detection Of Potassium In Wasp-31b Along With A Cloud Deck And Rayleigh Scattering, David K. Sing, Hannah R. Wakeford, Adam P. Showman, Nikolay Nikolov, Jonathan J. Fortney, Adam Burrows, Gilda E. Ballester, Drake Deming, Suzanne Aigrain, Jean-Michel Désert, Neale P. Gibson, Gregory W. Henry, Heather Knutson, Alain Lecavelier Des Etangs, Frederic Pont, Alfred Vidal-Madjar, Michael H. Williamson, Paul A. Wilson
Information Systems and Engineering Management Research Publications
We present Hubble Space Telescope optical and near-IR transmission spectra of the transiting hot-Jupiter WASP-31b. The spectrum covers 0.3–1.7 μm at a resolution R ∼ 70, which we combine with Spitzer photometry to cover the full-optical to IR. The spectrum is dominated by a cloud deck with a flat transmission spectrum which is apparent at wavelengths > 0.52 μm. The cloud deck is present at high altitudes and low pressures, as it covers the majority of the expected optical Na line and near-IR H2O features. While Na i absorption is not clearly identified, the resulting spectrum does show a very strong …
Astrometry, Radial Velocity, And Photometry: The Hd 128311 System Remixed With Data From Hst, Het, And Apt, Barbara E. Mcarthur, George Fritz Benedict, Gregory W. Henry, Artie Hatzes, William D. Cochran, Tom E. Harrison, Chris Johns-Krull, Ed Nelan
Astrometry, Radial Velocity, And Photometry: The Hd 128311 System Remixed With Data From Hst, Het, And Apt, Barbara E. Mcarthur, George Fritz Benedict, Gregory W. Henry, Artie Hatzes, William D. Cochran, Tom E. Harrison, Chris Johns-Krull, Ed Nelan
Information Systems and Engineering Management Research Publications
We have used high-cadence radial velocity measurements from the Hobby–Eberly Telescope with published velocities from the Lick 3 m Shane Telescope, combined with astrometric data from the Hubble Space Telescope (HST) Fine Guidance Sensors to refine the orbital parameters of the HD 128311 system, and determine an inclination of 55fdg95 ± 14fdg55 and true mass of 3.789 $^{+0.924}_{ -0.432}$ MJUP for HD 128311 c. The combined radial velocity data also reveal a short period signal which could indicate a third planet in the system with an Msin i of 0.133 ± 0.005 MJUP or stellar phenomena. Photometry from the T12 …
The Nasa-Uc-Uh Eta-Earth Program. Iv. A Low-Mass Planet Orbiting An M Dwarf 3.6 Pc From Earth, Andrew W. Howard, Geoffrey W. Marcy, Debra A. Fischer, Howard Isaacson, Philip S. Muirhead, Gregory W. Henry, Tabetha S. Boyajian, Kaspar Von Braun, Juliette C. Becker, Jason T. Wright, John Asher Johnson
The Nasa-Uc-Uh Eta-Earth Program. Iv. A Low-Mass Planet Orbiting An M Dwarf 3.6 Pc From Earth, Andrew W. Howard, Geoffrey W. Marcy, Debra A. Fischer, Howard Isaacson, Philip S. Muirhead, Gregory W. Henry, Tabetha S. Boyajian, Kaspar Von Braun, Juliette C. Becker, Jason T. Wright, John Asher Johnson
Information Systems and Engineering Management Research Publications
We report the discovery of a low-mass planet orbiting Gl 15 A based on radial velocities from the Eta-Earth Survey using HIRES at Keck Observatory. Gl 15 Ab is a planet with minimum mass Msin i = 5.35 ± 0.75 M⊕, orbital period P = 11.4433 ± 0.0016 days, and an orbit that is consistent with circular. We characterize the host star using a variety of techniques. Photometric observations at Fairborn Observatory show no evidence for rotational modulation of spots at the orbital period to a limit of ∼0.1 mmag, thus supporting the existence of the planet. We detect a …
A Four-Planet System Orbiting The K0v Star Hd 141399, Steve Vogt, R. Paul Butler, Eugenio J. Rivera, Robert I. Kibrick, Jennifer Burt, Russell Hanson, Stefano Meschiari, Gregory W. Henry, Gregory Laughlin
A Four-Planet System Orbiting The K0v Star Hd 141399, Steve Vogt, R. Paul Butler, Eugenio J. Rivera, Robert I. Kibrick, Jennifer Burt, Russell Hanson, Stefano Meschiari, Gregory W. Henry, Gregory Laughlin
Information Systems and Engineering Management Research Publications
We present precision radial velocity (RV) data sets from Keck-HIRES and from Lick Observatory's new Automated Planet Finder Telescope and Levy Spectrometer on Mt. Hamilton that reveal a multiple-planet system orbiting the nearby, slightly evolved, K-type star HD 141399. Our 91 observations over 10.5 yr suggest the presence of four planets with orbital periods of 94.35, 202.08, 1070.35, and 3717.35 days and minimum masses of 0.46, 1.36, 1.22, and 0.69 MJ, respectively. The orbital eccentricities of the three inner planets are small, and the phase curves are well sampled. The inner two planets lie just outside the 2:1 resonance, suggesting …
Hst Hot-Jupiter Transmission Spectral Survey: Evidence For Aerosols And Lack Of Tio In The Atmosphere Of Wasp-12b, David K. Sing, Alain Lecavelier Des Etangs, Jonathan J. Fortney, Adam Burrows, Frederic Pont, Hannah R. Wakeford, Gilda E. Ballester, Nikolay Nikolov, Gregory W. Henry, Suzanne Aigrain, Drake Deming, Thomas M. Evans, Neale P. Gibson, Catherine M. Huitson, Heather Knutson, Adam P. Showman, Alfred Vidal-Madjar, Paul A. Wilson, Michael H. Williamson, Kevin J. Zahnle
Hst Hot-Jupiter Transmission Spectral Survey: Evidence For Aerosols And Lack Of Tio In The Atmosphere Of Wasp-12b, David K. Sing, Alain Lecavelier Des Etangs, Jonathan J. Fortney, Adam Burrows, Frederic Pont, Hannah R. Wakeford, Gilda E. Ballester, Nikolay Nikolov, Gregory W. Henry, Suzanne Aigrain, Drake Deming, Thomas M. Evans, Neale P. Gibson, Catherine M. Huitson, Heather Knutson, Adam P. Showman, Alfred Vidal-Madjar, Paul A. Wilson, Michael H. Williamson, Kevin J. Zahnle
Information Systems and Engineering Management Research Publications
We present Hubble Space Telescope (HST) optical transmission spectra of the transiting hot-Jupiter WASP-12b, taken with the Space Telescope Imaging Spectrograph instrument. The resulting spectra cover the range 2900–10 300 Å which we combined with archival Wide Field Camera 3 spectra and Spitzer photometry to cover the full optical to infrared wavelength regions. With high spatial resolution, we are able to resolve WASP-12A's stellar companion in both our images and spectra, revealing that the companion is in fact a close binary M0V pair, with the three stars forming a triple-star configuration. We derive refined physical parameters of the WASP-12 system, …
Hst Hot Jupiter Transmission Spectral Survey: Detection Of Water In Hat-P-1b From Wfc3 Near-Ir Spatial Scan Observations, Hannah R. Wakeford, David K. Sing, Drake Deming, Neale P. Gibson, Jonathan J. Fortney, Adam Burrows, Gilda E. Ballester, Nikolay Nikolov, Suzanne Aigrain, Gregory W. Henry, Heather Knutson, Alain Lecavelier Des Etangs, Frederic Pont, Adam P. Showman, Alfred Vidal-Madjar, Kevin J. Zahnle
Hst Hot Jupiter Transmission Spectral Survey: Detection Of Water In Hat-P-1b From Wfc3 Near-Ir Spatial Scan Observations, Hannah R. Wakeford, David K. Sing, Drake Deming, Neale P. Gibson, Jonathan J. Fortney, Adam Burrows, Gilda E. Ballester, Nikolay Nikolov, Suzanne Aigrain, Gregory W. Henry, Heather Knutson, Alain Lecavelier Des Etangs, Frederic Pont, Adam P. Showman, Alfred Vidal-Madjar, Kevin J. Zahnle
Information Systems and Engineering Management Research Publications
We present Hubble Space Telescope near-infrared transmission spectroscopy of the transiting hot-Jupiter HAT-P-1b. We observed one transit with Wide Field Camera 3 using the G141 low-resolution grism to cover the wavelength range 1.087–1.678 μm. These time series observations were taken with the newly available spatial-scan mode that increases the duty cycle by nearly a factor of 2, thus improving the resulting photometric precision of the data. We measure a planet-to-star radius ratio of Rp/R* = 0.117 09 ± 0.000 38 in the white light curve with the centre of transit occurring at 245 6114.345 ± 0.000 133 (JD). We achieve …
An Hst Optical-To-Near-Ir Transmission Spectrum Of The Hot Jupiter Wasp-19b: Detection Of Atmospheric Water And Likely Absence Of Tio, Catherine M. Huitson, David K. Sing, Frederic Pont, Jonathan J. Fortney, Adam Burrows, Paul A. Wilson, Gilda E. Ballester, Nikolay Nikolov, Neale P. Gibson, Drake Deming, Suzanne Aigrain, Thomas M. Evans, Gregory W. Henry, Alain Lecavelier Des Etangs, Adam P. Showman, Alfred Vidal-Madjar, Kevin J. Zahnle
An Hst Optical-To-Near-Ir Transmission Spectrum Of The Hot Jupiter Wasp-19b: Detection Of Atmospheric Water And Likely Absence Of Tio, Catherine M. Huitson, David K. Sing, Frederic Pont, Jonathan J. Fortney, Adam Burrows, Paul A. Wilson, Gilda E. Ballester, Nikolay Nikolov, Neale P. Gibson, Drake Deming, Suzanne Aigrain, Thomas M. Evans, Gregory W. Henry, Alain Lecavelier Des Etangs, Adam P. Showman, Alfred Vidal-Madjar, Kevin J. Zahnle
Information Systems and Engineering Management Research Publications
We measure the transmission spectrum of WASP-19b from three transits using low-resolution optical spectroscopy from the Hubble Space Telescope (HST) Space Telescope Imaging Spectrograph (STIS). The STIS spectra cover a wavelength range of 0.29–1.03 μm, with resolving power R = 500. The optical data are combined with archival near-infrared data from the HST Wide Field Camera 3 (WFC3) G141 grism, covering the wavelength range from 1.087 to 1.687 μm, with resolving power R = 130. We reach signal-to-noise levels between 3000 and 11 000 in 0.1 μm bins when measuring the transmission spectra from 0.53–1.687 μm. WASP-19 is known to …
The Prevalence Of Dust On The Exoplanet Hd 189733b From Hubble And Spitzer Observations, Frederic Pont, David K. Sing, Neale P. Gibson, Suzanne Aigrain, Gregory W. Henry, Nawal Husnoo
The Prevalence Of Dust On The Exoplanet Hd 189733b From Hubble And Spitzer Observations, Frederic Pont, David K. Sing, Neale P. Gibson, Suzanne Aigrain, Gregory W. Henry, Nawal Husnoo
Information Systems and Engineering Management Research Publications
The hot Jupiter HD 189733b is the most extensively observed exoplanet. Its atmosphere has been detected and characterized in transmission and eclipse spectroscopy, and its phase curve measured at several wavelengths. This paper brings together the results of our campaign to obtain the complete transmission spectrum of the atmosphere of this planet from UV to infrared with the Hubble Space Telescope, using the STIS, ACS and WFC3 instruments. We provide a new tabulation of the transmission spectrum across the entire visible and infrared range. The radius ratio in each wavelength band was re-derived, where necessary, to ensure a consistent treatment …
Host Star Properties And Transit Exclusion For The Hd 38529 Planetary System, Gregory W. Henry, Stephen R. Kane, Sharon X. Wang, Jason T. Wright, Tabetha S. Boyajian, Kaspar Von Braun, David R. Ciardi, Diana Dragomir, Chris D. Farrington, Debra A. Fischer, Natalie R. Hinkel, Andrew W. Howard, Eric Jensen, Gregory Laughlin, Suvrath Mahadevan, Genady Pilyavsky
Host Star Properties And Transit Exclusion For The Hd 38529 Planetary System, Gregory W. Henry, Stephen R. Kane, Sharon X. Wang, Jason T. Wright, Tabetha S. Boyajian, Kaspar Von Braun, David R. Ciardi, Diana Dragomir, Chris D. Farrington, Debra A. Fischer, Natalie R. Hinkel, Andrew W. Howard, Eric Jensen, Gregory Laughlin, Suvrath Mahadevan, Genady Pilyavsky
Information Systems and Engineering Management Research Publications
The transit signature of exoplanets provides an avenue through which characterization of exoplanetary properties may be undertaken, such as studies of mean density, structure, and atmospheric composition. The Transit Ephemeris Refinement and Monitoring Survey is a program to expand the catalog of transiting planets around bright host stars by refining the orbits of known planets discovered with the radial velocity technique. Here we present results for the HD 38529 system. We determine fundamental properties of the host star through direct interferometric measurements of the radius and through spectroscopic analysis. We provide new radial velocity measurements that are used to improve …
The Discovery Of Hd 37605c And A Dispositive Null Detection Of Transits Of Hd 37605b, Sharon Xuesong Wang, Jason T. Wright, William D. Cochran, Stephen R. Kane, Gregory W. Henry, Matthew J. Payne, Michael Endl, Phillip J. Macqueen, Jeff A. Valenti, Victoria Antoci, Diana Dragomir, Jaymie M. Matthews, Andrew W. Howard, Geoffrey W. Marcy, Howard Isaacson, Eric B. Ford, Suvrath Mahadevan, Kaspar Von Braun
The Discovery Of Hd 37605c And A Dispositive Null Detection Of Transits Of Hd 37605b, Sharon Xuesong Wang, Jason T. Wright, William D. Cochran, Stephen R. Kane, Gregory W. Henry, Matthew J. Payne, Michael Endl, Phillip J. Macqueen, Jeff A. Valenti, Victoria Antoci, Diana Dragomir, Jaymie M. Matthews, Andrew W. Howard, Geoffrey W. Marcy, Howard Isaacson, Eric B. Ford, Suvrath Mahadevan, Kaspar Von Braun
Information Systems and Engineering Management Research Publications
We report the radial velocity discovery of a second planetary mass companion to the K0 V star HD 37605, which was already known to host an eccentric, P ∼ 55 days Jovian planet, HD 37605b. This second planet, HD 37605c, has a period of ∼7.5 years with a low eccentricity and an Msin i of ∼3.4 MJup. Our discovery was made with the nearly 8 years of radial velocity follow-up at the Hobby–Eberly Telescope and Keck Observatory, including observations made as part of the Transit Ephemeris Refinement and Monitoring Survey effort to provide precise ephemerides to long-period planets for transit …
Non-Detection Of Previously Reported Transits Of Hd 97658b With Most* Photometry, Diana Dragomir, Jaymie M. Matthews, Andrew W. Howard, Victoria Antoci, Gregory W. Henry, David B. Guenther, John A. Johnson, Rainer Kuschnig, Geoffrey W. Marcy, Anthony F. J. Moffat, Jason F. Rowe, Slavek M. Rucinski, Dimitar Sasselov, Werner W. Weiss
Non-Detection Of Previously Reported Transits Of Hd 97658b With Most* Photometry, Diana Dragomir, Jaymie M. Matthews, Andrew W. Howard, Victoria Antoci, Gregory W. Henry, David B. Guenther, John A. Johnson, Rainer Kuschnig, Geoffrey W. Marcy, Anthony F. J. Moffat, Jason F. Rowe, Slavek M. Rucinski, Dimitar Sasselov, Werner W. Weiss
Information Systems and Engineering Management Research Publications
The radial velocity-discovered exoplanet HD 97658b was recently announced to transit, with a derived planetary radius of 2.93 ± 0.28 R⊕. As a transiting super-Earth orbiting a bright star, this planet would make an attractive candidate for additional observations, including studies of its atmospheric properties. We present and analyze follow-up photometric observations of the HD 97658 system acquired with the Microvariability and Oscillations of STars space telescope. Our results show no transit with the depth and ephemeris reported in the announcement paper. For the same ephemeris, we rule out transits for a planet with radius larger than 2.09 R⊕, corresponding …
The Lick–Carnegie Survey: A New Two-Planet System Around The Star Hd 207832, Nader Haghighipour, R. Paul Butler, Eugenio J. Rivera, Gregory W. Henry, Steve Vogt
The Lick–Carnegie Survey: A New Two-Planet System Around The Star Hd 207832, Nader Haghighipour, R. Paul Butler, Eugenio J. Rivera, Gregory W. Henry, Steve Vogt
Information Systems and Engineering Management Research Publications
Keck/HIRES precision radial velocities of HD 207832 indicate the presence of two Jovian-type planetary companions in Keplerian orbits around this G star. The planets have minimum masses of Msin i = 0.56 MJup and 0.73 MJup, with orbital periods of ∼162 and ∼1156 days, and eccentricities of 0.13 and 0.27, respectively. Strömgren b and y photometry reveals a clear stellar rotation signature of the host star with a period of 17.8 days, well separated from the period of the radial velocity variations, reinforcing their Keplerian origin. The values of the semimajor axes of the planets suggest that these objects have …
The Hd 192263 System: Planetary Orbital Period And Stellar Variability Disentangled, Diana Dragomir, Stephen R. Kane, Gregory W. Henry, David R. Ciardi, Debra A. Fischer, Andrew W. Howard, Eric L. N. Jensen, Gregory Laughlin, Suvrath Mahadevan, Jaymie M. Matthews, Genady Pilyavsky, Kaspar Von Braun, Sharon X. Wang, Jason T. Wright
The Hd 192263 System: Planetary Orbital Period And Stellar Variability Disentangled, Diana Dragomir, Stephen R. Kane, Gregory W. Henry, David R. Ciardi, Debra A. Fischer, Andrew W. Howard, Eric L. N. Jensen, Gregory Laughlin, Suvrath Mahadevan, Jaymie M. Matthews, Genady Pilyavsky, Kaspar Von Braun, Sharon X. Wang, Jason T. Wright
Information Systems and Engineering Management Research Publications
As part of the Transit Ephemeris Refinement and Monitoring Survey, we present new radial velocities and photometry of the HD 192263 system. Our analysis of the already available Keck-HIRES and CORALIE radial velocity measurements together with the five new Keck measurements we report in this paper results in improved orbital parameters for the system. We derive constraints on the size and phase location of the transit window for HD 192263b, a Jupiter-mass planet with a period of 24.3587 ± 0.0022 days. We use 10 years of Automated Photoelectric Telescope photometry to analyze the stellar variability and search for planetary transits. …
3.6 And 4.5 Μm Phase Curves And Evidence For Non-Equilibrium Chemistry In The Atmosphere Of Extrasolar Planet Hd 189733b, Heather A. Knutson, Nikole K. Lewis, Jonathan J. Fortney, Adam Burrows, Adam P. Showman, Nicolas B. Cowan, Eric Agol, Suzanne Aigrain, David Charbonneau, Drake Deming, Jean-Michel Désert, Gregory W. Henry, Jonathan Langton, Gregory Laughlin
3.6 And 4.5 Μm Phase Curves And Evidence For Non-Equilibrium Chemistry In The Atmosphere Of Extrasolar Planet Hd 189733b, Heather A. Knutson, Nikole K. Lewis, Jonathan J. Fortney, Adam Burrows, Adam P. Showman, Nicolas B. Cowan, Eric Agol, Suzanne Aigrain, David Charbonneau, Drake Deming, Jean-Michel Désert, Gregory W. Henry, Jonathan Langton, Gregory Laughlin
Information Systems and Engineering Management Research Publications
We present new, full-orbit observations of the infrared phase variations of the canonical hot Jupiter HD 189733b obtained in the 3.6 and 4.5 μm bands using the Spitzer Space Telescope. When combined with previous phase curve observations at 8.0 and 24 μm, these data allow us to characterize the exoplanet's emission spectrum as a function of planetary longitude and to search for local variations in its vertical thermal profile and atmospheric composition. We utilize an improved method for removing the effects of intrapixel sensitivity variations and robustly extracting phase curve signals from these data, and we calculate our best-fit parameters …
Probing The Haze In The Atmosphere Of Hd 189733b With Hubble Space Telescope/Wfc3 Transmission Spectroscopy, Neale P. Gibson, Suzanne Aigrain, Frederic Pont, David K. Sing, Jean-Michel Désert, Thomas M. Evans, Gregory W. Henry, Nawal Husnoo, Heather Knutson
Probing The Haze In The Atmosphere Of Hd 189733b With Hubble Space Telescope/Wfc3 Transmission Spectroscopy, Neale P. Gibson, Suzanne Aigrain, Frederic Pont, David K. Sing, Jean-Michel Désert, Thomas M. Evans, Gregory W. Henry, Nawal Husnoo, Heather Knutson
Information Systems and Engineering Management Research Publications
We present Hubble Space Telescope near-infrared transmission spectroscopy of the transiting exoplanet HD 189733b, using the Wide Field Camera 3 (WFC3). This consists of time series spectra of two transits, used to measure the wavelength dependence of the planetary radius. These observations aim to test whether the Rayleigh scattering haze detected at optical wavelengths extends into the near-infrared, or if it becomes transparent leaving molecular features to dominate the transmission spectrum. Due to saturation and non-linearity affecting the brightest (central) pixels of the spectrum, light curves were extracted from the blue and red ends of the spectra only, corresponding to …
A High-Eccentricity Component In The Double-Planet System Around Hd 163607 And A Planet Around Hd 164509*, Matthew J. Giguere, Debra A. Fischer, Andrew W. Howard, John A. Johnson, Gregory W. Henry, Jason T. Wright, Geoffrey W. Marcy, Howard Isaacson, Fengji Hou, Julien Spronck
A High-Eccentricity Component In The Double-Planet System Around Hd 163607 And A Planet Around Hd 164509*, Matthew J. Giguere, Debra A. Fischer, Andrew W. Howard, John A. Johnson, Gregory W. Henry, Jason T. Wright, Geoffrey W. Marcy, Howard Isaacson, Fengji Hou, Julien Spronck
Information Systems and Engineering Management Research Publications
We report the detection of three new exoplanets from Keck Observatory. HD 163607 is a metal-rich G5IV star with two planets. The inner planet has an observed orbital period of 75.29 ± 0.02 days, a semi-amplitude of 51.1 ± 1.4 m s−1, an eccentricity of 0.73 ± 0.02, and a derived minimum mass of MPsin i = 0.77 ± 0.02 MJup. This is the largest eccentricity of any known planet in a multi-planet system. The argument of periastron passage is 78.7 ± 2fdg0; consequently, the planet's closest approach to its parent star is very near the line of sight, leading …
A Search For The Transit Of Hd 168443b: Improved Orbital Parameters And Photometry, Genady Pilyavsky, Suvrath Mahadevan, Stephen R. Kane, Andrew W. Howard, David R. Ciardi, Chris De Pree, Diana Dragomir, Debra A. Fischer, Gregory W. Henry, Eric L. N. Jensen, Gregory Laughlin
A Search For The Transit Of Hd 168443b: Improved Orbital Parameters And Photometry, Genady Pilyavsky, Suvrath Mahadevan, Stephen R. Kane, Andrew W. Howard, David R. Ciardi, Chris De Pree, Diana Dragomir, Debra A. Fischer, Gregory W. Henry, Eric L. N. Jensen, Gregory Laughlin
Information Systems and Engineering Management Research Publications
The discovery of transiting planets around bright stars holds the potential to greatly enhance our understanding of planetary atmospheres. In this work we present the search for transits of HD 168443b, a massive planet orbiting the bright star HD 168443 (V = 6.92) with a period of 58.11 days. The high eccentricity of the planetary orbit (e = 0.53) significantly enhances the a priori transit probability beyond that expected for a circular orbit, making HD 168443 a candidate for our ongoing Transit Ephemeris Refinement and Monitoring Survey. Using additional radial velocities from Keck High Resolution Echelle Spectrometer, we refined the …