Orbital Elements And Stellar Parameters Of The Active Binary Ux Arietis,
2017
European Southern Observatory
Orbital Elements And Stellar Parameters Of The Active Binary Ux Arietis, Christian A. Hummel, John D. Monnier, Rachael M. Roettenbacher, Guillermo Torres, Gregory W. Henry, Heidi Korhonen, Anthony Beasley, Gail H. Schaefer, Nils H. Turner, Theo A. Ten Brummelaar, Chris D. Farrington, Judit Sturmann, Laszlo Sturmann, Frédérique Baron, Stefan Kraus
Information Systems and Engineering Management Research Publications
Stellar activity observed as large surface spots, radio flares, or emission lines is often found in binary systems. UX Arietis exhibits these signs of activity, originating on the K0 subgiant primary component. Our aim is to resolve the binary, measure the orbital motion, and provide accurate stellar parameters such as masses and luminosities to aid in the interpretation of the observed phenomena. Using the CHARA six-telescope optical long-baseline array on Mount Wilson, California, we obtained amplitudes and phases of the interferometric visibility on baselines up to 330 m in length, resolving the two components of the binary. We reanalyzed archival …
Quantum Physics And Relativity In Lovecraft's Fiction,
2017
Ursinus College
Quantum Physics And Relativity In Lovecraft's Fiction, Garrison Mccammon
English and Creative Writing Summer Fellows
The early twentieth century brought about some of the best and most influential horror or weird tales ever written in the English speaking world. The most impressive and most lauded author of the group composed of such figures as Algernon Blackwood, M. R. James, Arthur Machen, Clark A. Smith, and Robert E. Howard was H. P. Lovecraft. Posthumously declared the literary successor to Edgar Allan Poe, Lovecraft’s fiction and tales of terror have cast such a huge shadow that every significant author in weird writing since his passing has claimed him as a literary heir. Lovecraft’s works were a landmark …
The Extended Baryonic Halo Of Ngc 3923,
2017
Case Western Reserve University
The Extended Baryonic Halo Of Ngc 3923, Stacy S. Mcgaugh, J. Christopher Mihos
Faculty Scholarship
Galaxy halos and their globular cluster systems build up over time by the accretion of small satellites. We can learn about this process in detail by observing systems with ongoing accretion events and comparing the data with simulations. Elliptical shell galaxies are systems that are thought to be due to ongoing or recent minor mergers. We present preliminary results of an investigation of the baryonic halo-light profile, globular clusters, and shells/streams-of the shell galaxy NGC 3923 from deep Dark Energy Camera (DECam) g and i-band imaging. We present the 2D and radial distributions of the globular cluster candidates out to …
Search For Intermediate Mass Black Hole Binaries In The First Observing Run Of Advanced Ligo,
2017
The University of Texas Rio Grande Valley
Search For Intermediate Mass Black Hole Binaries In The First Observing Run Of Advanced Ligo, B. P. Abbott, R. Abbott, T. D. Abbott, F. Acernese, K. Ackley, Teviet Creighton, Mario C. Diaz, Soma Mukherjee, Volker Quetschke, Malik Rakhmanov
Physics & Astronomy Faculty Publications
During their first observational run, the two Advanced LIGO detectors attained an unprecedented sensitivity, resulting in the first direct detections of gravitational-wave signals produced by stellar-mass binary black hole systems. This paper reports on an all-sky search for gravitational waves (GWs) from merging intermediate mass black hole binaries (IMBHBs). The combined results from two independent search techniques were used in this study: the first employs a matched-filter algorithm that uses a bank of filters covering the GW signal parameter space, while the second is a generic search for GW transients (bursts). No GWs from IMBHBs were detected; therefore, we constrain …
Search For High-Energy Neutrinos From Gravitational Wave Event Gw151226 And Candidate Lvt151012 With Antares And Icecube,
2017
The University of Texas Rio Grande Valley
Search For High-Energy Neutrinos From Gravitational Wave Event Gw151226 And Candidate Lvt151012 With Antares And Icecube, A. Albert, M. André, M. Anghinolfi, Teviet Creighton, Mario C. Diaz, Soma Mukherjee, Volker Quetschke, Malik Rakhmanov
Physics & Astronomy Faculty Publications
The Advanced LIGO observatories detected gravitational waves from two binary black hole mergers during their first observation run (O1). We present a high-energy neutrino follow-up search for the second gravitational wave event, GW151226, as well as for gravitational wave candidate LVT151012. We find two and four neutrino candidates detected by IceCube, and one and zero detected by Antares, within ±500 s around the respective gravitational wave signals, consistent with the expected background rate. None of these neutrino candidates are found to be directionally coincident with GW151226 or LVT151012. We use nondetection to constrain isotropic-equivalent high-energy neutrino emission from GW151226, adopting …
Milky Way Tomography With K And M Dwarf Stars: The Vertical Structure Of The Galactic Disk,
2017
University of Kentucky
Milky Way Tomography With K And M Dwarf Stars: The Vertical Structure Of The Galactic Disk, Deborah Ferguson, Susan Gardner, Brian Yanny
Physics and Astronomy Faculty Publications
We use the number density distributions of K and M dwarf stars with vertical height from the Galactic disk, determined using observations from the Sloan Digital Sky Survey, to probe the structure of the Milky Way disk across the survey's footprint. Using photometric parallax as a distance estimator we analyze a sample of several million disk stars in matching footprints above and below the Galactic plane, and we determine the location and extent of vertical asymmetries in the number counts in a variety of thin- and thick-disk subsamples in regions of some 200 square degrees within 2 kpc in vertical …
The Validity Of 21 Cm Spin Temperature As A Kinetic Temperature Indicator In Atomic And Molecular Gas,
2017
University of Mumbai, India
The Validity Of 21 Cm Spin Temperature As A Kinetic Temperature Indicator In Atomic And Molecular Gas, Gargi Shaw, Gary J. Ferland, I. Hubeny
Physics and Astronomy Faculty Publications
The gas kinetic temperature (TK) of various interstellar environments is often inferred from observations that can deduce level populations of atoms, ions, or molecules using spectral line observations; H I 21 cm is perhaps the most widely used, and has a long history. Usually the H I 21 cm line is assumed to be in thermal equilibrium and the populations are given by the Boltzmann distribution. A variety of processes, many involving Lyα, can affect the 21 cm line. Here we show how this is treated in the spectral simulation code Cloudy, and present numerical …
Photoelectric Magnitude Measurements Of The Lunar Eclipses On May 16, 2003 And Oct. 28, 2004,
2017
Gordon State College
Photoelectric Magnitude Measurements Of The Lunar Eclipses On May 16, 2003 And Oct. 28, 2004, Richard W. Schmude Jr.
Georgia Journal of Science
The Moon's brightness dropped by 10.73 ± 0.07 and 10.61 ± 0.15 magnitudes during the total lunar eclipses on May 16, 2003 and Oct. 28, 2004 respectively. These magnitude drops are close to the corresponding value for the Jan., 2000 total lunar eclipse and indicate that not much change in the transparency of the atmosphere has occurred in the last 4 years.
Shakespeare, A Supernova, And A Little Green Man Walk Into A Mathematics Classroom,
2017
City University of New York
Shakespeare, A Supernova, And A Little Green Man Walk Into A Mathematics Classroom, Sheila Kirstin Miller
Journal of Humanistic Mathematics
Creativity amidst constraints is a hallmark of the STEM researcher. It is precisely what is required to see what has never been seen. It is also at the core of creative mathematics, more commonly called “research”. We in the 21st century tell ourselves that science and story are separate enterprises. One goal of this article is to tell parts of the human story—featuring Shakespeare, Tycho Brahe, visiting stars, Little Green Men, and modern astrophysics—that might erode belief in that duality and illustrate why dissolving the artificial barriers between talents within individuals is to the benefit of ourselves, our students, …
Wideband Photometry Of Saturn In 2004-2005,
2017
Gordon State College
Wideband Photometry Of Saturn In 2004-2005, Richard W. Schmude Jr.
Georgia Journal of Science
The writer made 60 photometric measurements of Saturn + rings between Nov. 5, 2004 and Jan. 21, 2005. The normalized magnitudes of Saturn for a ring tilt angle of 22° are B(1,0) = -8.55 ± 0.01, V(1,0) = -9.60 ± 0.01, B(1,0) = -10.27 ± 0.01, and I(1,0) = -10. 4 7 ± 0.01; the corresponding solar phase angle coefficients are cB = 0.027 ± 0.006, cV = 0.021 ± 0.005, cB = 0.020 ± 0.005, and cB = 0.022 ± 0.005. The 2005 opposition surge values (in magnitudes at a = 0°) are B = …
Direct Virtual Photon Production In Au+Au Collisions At √SNn = 200 Gev,
2017
AGH University of Science and Technology, Poland
Direct Virtual Photon Production In Au+Au Collisions At √SNn = 200 Gev, L. Adamczyk, James K. Adkins, G. Agakishiev, M. M. Aggarwal, Z. Ahammed, N. N. Ajitanand, I. Alekseev, D. M. Anderson, R. Aoyama, A. Aparin, D. Arkhipkin, E. C. Aschenauer, M. U. Ashraf, A. Attri, G. S. Averichev, X. Bai, V. Bairathi, A. Behera, R. Bellwied, A. Bhasin, A. K. Bhati, P. Bhattarai, J. Bielcik, J. Bielcikova, L. C. Bland, I. G. Bordyuzhin, J. Bouchet, J. D. Brandenburg, A. V. Brandin, D. Brown, Renee H. Fatemi, Suvarna Ramachandran
Physics and Astronomy Faculty Publications
We report the direct virtual photon invariant yields in the transverse momentum ranges 1 < pT < 3 GeV/c and 5 < pT < 10 GeV/c at mid-rapidity derived from the dielectron invariant mass continuum region 0.10 < Mee < 0.28 GeV/c2 for 0–80% minimum-bias Au+Au collisions at √sNN = 200 GeV. A clear excess in the invariant yield compared to the nuclear overlap function TAA scaled p + p reference is observed in the pT range 1 < pT < 3 GeV/c. For pT > 6 GeV/c the production follows TAA scaling. Model calculations with contributions from thermal radiation …
Wideband Photometric Magnitude Measurements Of Saturn Made During The 2005-06 Apparition,
2017
Gordon State College
Wideband Photometric Magnitude Measurements Of Saturn Made During The 2005-06 Apparition, Richard W. Schmude Jr.
Georgia Journal of Science
The writer made 37 brightness measurements of Saturn + rings between Nov. 3, 2005 and March 16, 2006 using the B (blue), V (green), R (red), and I (infrared) filters. The selected normalized magnitudes of Saturn at a ring tilt angle of 18° are: B(1,0) = - 8.43 ± 0.03, V(1,0) = -9.48 ± 0.02, R(1,0) = -10.16 ± 0.04, and 1(1,0) = -10.28 ± 0.02. The selected phase angle coefficients of Saturn, in magnitudes/degree, are: cB = 0.022 ± 0.014, cV = 0.021 ± 0.008, cR = 0.027 ± 0.015, and cI = 0.018 ± …
Wideband Photometry Of Saturn In 2006-2007,
2017
Gordon State College
Wideband Photometry Of Saturn In 2006-2007, Richard W. Schmude Jr.
Georgia Journal of Science
The writer carried out brightness measurements of Saturn and its rings with four different color filters. The selected normalized magnitudes of Saturn + rings for a ring tilt angle of 14° are B(1,0) = -8.25 ± 0.03, V(1,0) = -9.36 ± 0.03, R(1,0) = -10.01 ± 0.04 and 1(1,0) -10.16 ± 0.04. The opposition surge values for Saturn+ rings on Feb. 11, 2007 (solar phase angle = 0.15°) were 0.19 and 0.06 magnitudes for the Band V filters respectively. The writer concludes that the B-V and V-R color indexes of Saturn+ rings do not change much when the solar phase …
Oxygen Isotope Composition Of Water In Martian Meteorites,
2017
University of New Mexico
Oxygen Isotope Composition Of Water In Martian Meteorites, Oleg Vitalivich Maltsev
Earth and Planetary Sciences ETDs
The oxygen isotope composition of water extracted from Martian meteorites appears not to be in isotopic equilibrium with the silicate portion of the meteorites. This disequilibrium suggests the existence of multiple distinct oxygen isotope reservoirs on planet Mars. Here we present oxygen isotope measurements of waters extracted from Martian shergottites Tissint, Zagami and NWA-7042 and from nakhlite NWA-10153. These waters were extracted by stepwise heating to preserve segregation between low temperature adsorbed waters, intermediate temperature mineral waters and the high temperature mineral structural OH groups. The results of our study, analyzed cooperatively with previous work by Karlsson et al., (1992) …
The Sluggs Survey: Dark Matter Fractions At Large Radii And Assembly Epochs Of Early-Type Galaxies From Globular Cluster Kinematics,
2017
Swinburne University of Technology
The Sluggs Survey: Dark Matter Fractions At Large Radii And Assembly Epochs Of Early-Type Galaxies From Globular Cluster Kinematics, Adebusola Alabi, Duncan Forbes, Aaron Romanowsky, Jean Brodie, Jay Strader, Joachim Janz, Christopher Usher, Lee Spitler, Sabine Bellstedt, Anna Ferré-Mateu
Faculty Publications
We use globular cluster kinematics data, primarily from the SAGES Legacy Unifying Globulars and GalaxieS (SLUGGS) survey, to measure the dark matter fraction (fDM) and the average dark matter density (〈ρDM〉) within the inner 5 effective radii (Re) for 32 nearby early-type galaxies (ETGs) with stellar mass log (M*/M⊙) ranging from 10.1 to 11.8. We compare our results with a simple galaxy model based on scaling relations as well as with cosmological hydrodynamical simulations where the dark matter profile has been modified through various physical processes. We find a high fDM (≥0.6) within 5 Re in most of our sample, …
Using Advanced Psf Subtraction Techniques On Archival Data Of Herbig Ae/Be Stars To Search For New Candidate Companions,
2017
Brigham Young University
Using Advanced Psf Subtraction Techniques On Archival Data Of Herbig Ae/Be Stars To Search For New Candidate Companions, Emily Diane Safsten
Theses and Dissertations
Herbig Ae/Be (HAeBe) stars are intermediate mass (2-10 solar mass) pre-main sequence stars with circumstellar disks. Observing planets within these young disks would greatly aid in understanding planet formation processes and timescales particularly around massive stars. So far, only one planet, HD 100546 b, has been confirmed to orbit a HAeBe star. With over 250 HAeBe stars known, and several observed to have disks with structures thought to be related to planet formation, it seems likely that there are as yet undiscovered planetary companions within the circumstellar disks of some of these young stars. Direct detection of a low-luminosity companion …
Creating An Experimental Learning And Research Driven Spacesuit Lab For Erau,
2017
Embry-Riddle Aeronautical University
Creating An Experimental Learning And Research Driven Spacesuit Lab For Erau, Ryan L. Kobrick, Erik Seedhouse
Publications
This paper evaluates key functional data parameters that must be considered for suborbital spaceflight participants wearing pressurized suits for intravehicular activity (IVA). Data parameters of an analog spacesuit worn in an analog flight environment were obtained from 40 civilian participants using the Suborbital Space Flight Simulator (SSFS) at Embry-Riddle Aeronautical University (ERAU) while donning Final Frontier Design’s (FFD) fully pressurized third-generation spacesuit as part of their training for Project PoSSUM (the Polar Suborbital Science in the Upper Mesosphere Project). The physiological data collected included: blood pressure, electrocardiograms, heart rate, grip strength, and skin temperature. These parameters were measured using a …
Ionic Thermoelectric Paper,
2017
Linköping Universitet, Sweden
Ionic Thermoelectric Paper, Fei Jiao, Ali Naderi, Dan Zhao, Joshua Schlueter, Maryam Shahi, Jonas Sundström, Hjalmar Granberg, Jesper Edberg, Ujwala Ail, Joseph W. Brill, Tom Lindström, Magnus Berggren, Xavier Crispin
Physics and Astronomy Faculty Publications
Ionic thermoelectric materials, for example, polyelectrolytes such as polystyrene sulfonate sodium (PSSNa), constitute a new class of materials which are attracting interest because of their large Seebeck coefficient and the possibility that they could be used in ionic thermoelectric SCs (ITESCs) and field effect transistors. However, pure polyelectrolyte membranes are not robust or flexible. In this paper, the preparation of ionic thermoelectric paper using a simple, scalable and cost-effective method is described. After a composite was fabricated with nanofibrillated cellulose (NFC), the resulting NFC–PSSNa paper is flexible and mechanically robust, which is desirable if it is to be used in …
Sloan Digital Sky Survey Iv: Mapping The Milky Way, Nearby Galaxies, And The Distant Universe,
2017
New York University
Sloan Digital Sky Survey Iv: Mapping The Milky Way, Nearby Galaxies, And The Distant Universe, Michael R. Blanton, Matthew A. Bershady, Bela Abolfathi, Franco D. Albareti, Carlos Allende Prieto, Andres Almeida, Javier Alonso-García, Friedrich Anders, Scott F. Anderson, Brett Andrews, Erik Aquino-Ortíz, Alfonso Aragón-Salamanca, Maria Argudo-Fernández, Eric Armengaud, Eric Aubourg, Vladimir Avila-Reese, Carles Badenes, Stephen Bailey, Kathleen A. Barger, Jorge Barrera-Ballesteros, Curtis Bartosz, Dominic Bates, Falk Baumgarten, Julian Bautista, Rachael Beaton, Francesco Belfiore, Chad F. Bender, Andreas A. Berlind, Mariangela Bernardi, Florian Beutler, Renbin Yan, Daniel Lazarz, Kai Zhang
Physics and Astronomy Faculty Publications
We describe the Sloan Digital Sky Survey IV (SDSS-IV), a project encompassing three major spectroscopic programs. The Apache Point Observatory Galactic Evolution Experiment 2 (APOGEE-2) is observing hundreds of thousands of Milky Way stars at high resolution and high signal-to-noise ratios in the near-infrared. The Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) survey is obtaining spatially resolved spectroscopy for thousands of nearby galaxies (median z ~ 0.03). The extended Baryon Oscillation Spectroscopic Survey (eBOSS) is mapping the galaxy, quasar, and neutral gas distributions between z ~ 0.6 and 3.5 to constrain cosmology using baryon acoustic oscillations, redshift space distortions, …
Wideband Photometry Of Saturn In 2007-2008,
2017
Gordon State College
Wideband Photometry Of Saturn In 2007-2008, Richard W. Schmude Jr.
Georgia Journal of Science
The writer made 45 brightness measurements of Saturn + rings between Nov. 28, 2007 and April 24, 2008. The selected B(1,0), V(1,0), R(1,0) and I(1,0) values for Saturn + rings for b = 7° are: -8.10 ± 0.01, -9.14 ± 0.01, -9.77 ± 0.01 and -9.87 ± 0.02 respectively. The selected solar phase angle coefficients (in magnitudes/degree) are: 0.041 ± 0.006, 0.034 ± 0.005, 0.022 ± 0.007 and 0.027 ± 0.007 respectively. It is concluded that the angle between the ring plane and the Sun (B') has as much affect on the results as the angle between the ring plane …
