Open Access. Powered by Scholars. Published by Universities.®
Physical Sciences and Mathematics Commons™
Open Access. Powered by Scholars. Published by Universities.®
- Institution
- Publication
- Publication Type
Articles 1 - 10 of 10
Full-Text Articles in Physical Sciences and Mathematics
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 …
Hot Methane Line Lists For Exoplanet And Brown Dwarf Atmospheres, Robert J. Hargreaves, Christopher A. Beale, Laurent Michaux, Melis Irfan, Peter F. Bernath
Hot Methane Line Lists For Exoplanet And Brown Dwarf Atmospheres, Robert J. Hargreaves, Christopher A. Beale, Laurent Michaux, Melis Irfan, Peter F. Bernath
Chemistry & Biochemistry Faculty Publications
We present comprehensive experimental line lists of methane (CH4) at high temperatures obtained by recording Fourier transform infrared emission spectra. Calibrated line lists are presented for the temperatures 300-1400°C at twelve 100°C intervals spanning the 960-5000 cm-1 (2.0-10.4 μm) region of the infrared. This range encompasses the dyad, pentad, and octad regions, i.e., all fundamental vibrational modes along with a number of combination, overtone and hot bands. Using our CH4 spectra, we have estimated empirical lower state energies (Elow in cm-1) and our values have been incorporated into the line lists along …
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 …
Observations Of Herbig Ae/Be Stars With Herschel/Pacs. The Atomic And Molecular Contents Of Their Protoplanetary Discs, G Meeus, B Montesinos, I Mendigutia, I Kamp, W F. Thi, C Eiroa, C A. Grady, G Mathews, G Sandell, C. Martin-Zaidi, Sean D. Brittain, W.R.F. Dent, C Howard, F Menard, C Pinte, A Roberge, B Vandenbussche, J P. Williams
Observations Of Herbig Ae/Be Stars With Herschel/Pacs. The Atomic And Molecular Contents Of Their Protoplanetary Discs, G Meeus, B Montesinos, I Mendigutia, I Kamp, W F. Thi, C Eiroa, C A. Grady, G Mathews, G Sandell, C. Martin-Zaidi, Sean D. Brittain, W.R.F. Dent, C Howard, F Menard, C Pinte, A Roberge, B Vandenbussche, J P. Williams
Publications
We observed a sample of 20 representative Herbig Ae/Be stars and 5 A-type debris discs with PACS onboard Herschel, as part of the GAS in Protoplanetary Systems (GASPS) project. The observations were done in spectroscopic mode, and cover the far-infrared lines of [O i], [C ii], CO, CH+, H2O, and OH. We have a [Oi] 63 μm detection rate of 100% for the Herbig Ae/Be and 0% for the debris discs. The [Oi] 145 μm line is only detected in 25% and CO J = 18–17 in 45% (and fewer cases for higher J transitions) of the Herbig Ae/Be stars, …
Detection Of Thermal Emission From A Super-Earth, Brice-Olivier Demory, Michaël Gillon, Sara Seager, Bjoern Benneke, Drake Deming, Brian Jackson
Detection Of Thermal Emission From A Super-Earth, Brice-Olivier Demory, Michaël Gillon, Sara Seager, Bjoern Benneke, Drake Deming, Brian Jackson
Brian Jackson
We report on the detection of infrared light from the super-Earth 55 Cnc e, based on four occultations obtained with Warm Spitzer at 4.5 μm. Our data analysis consists of a two-part process. In a first step, we perform individual analyses of each data set and compare several baseline models to optimally account for the systematics affecting each light curve. We apply independent photometric correction techniques, including polynomial detrending and pixel mapping, that yield consistent results at the 1σ level. In a second step, we perform a global Markov Chain Monte Carlo analysis, including all four data sets that yield …
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 …
The Allen Telescope Array Search For Electrostatic Discharges On Mars, Marin M. Anderson, Andrew P.V. Siemion, William C. Barott, Geoffery C. Bower, Gregory T. Delory, Imke De Pater, Dan Werthimer
The Allen Telescope Array Search For Electrostatic Discharges On Mars, Marin M. Anderson, Andrew P.V. Siemion, William C. Barott, Geoffery C. Bower, Gregory T. Delory, Imke De Pater, Dan Werthimer
Department of Electrical Engineering and Computer Science - Daytona Beach
The Allen Telescope Array was used to monitor Mars between 2010 March 9 and June 2, over a total of approximately 30 hr, for radio emission indicative of electrostatic discharge. The search was motivated by the report from Ruf et al. of the detection of non-thermal microwave radiation from Mars characterized by peaks in the power spectrum of the kurtosis, or kurtstrum, at 10 Hz, coinciding with a large dust storm event on 2006 June 8. For these observations, we developed a wideband signal processor at the Center for Astronomy Signal Processing and Electronics Research. This 1024 channel spectrometer calculates …