Light Vs. Quantum Gravity,
2012
Department of Mathematical Science, University of Texas at El Paso
Light Vs. Quantum Gravity, Irving Martinez^*
COURI Symposium Abstracts, Spring 2012
No abstract provided.
Implementation And Testing Of The First Prompt Search For Gravitational Wave Transients With Electromagnetic Counterparts,
2012
The University of Texas Rio Grande Valley
Implementation And Testing Of The First Prompt Search For Gravitational Wave Transients With Electromagnetic Counterparts, J. Abadie, Matthew Benacquista, Teviet Creighton, Mario C. Diaz, Soumya Mohanty, Soma Mukherjee, Volker Quetschke, Malik Rakhmanov, Joseph D. Romano
Physics & Astronomy Faculty Publications
Aims. A transient astrophysical event observed in both gravitational wave (GW) and electromagnetic (EM) channels would yield rich scientific rewards. A first program initiating EM follow-ups to possible transient GW events has been developed and exercised by the LIGO and Virgo community in association with several partners. In this paper, we describe and evaluate the methods used to promptly identify and localize GW event candidates and to request images of targeted sky locations. Methods. During two observing periods (Dec. 17, 2009 to Jan. 8, 2010 and Sep. 2 to Oct. 20, 2010), a low-latency analysis pipeline was used to identify …
Implementation And Testing Of The First Prompt Search For Gravitational Wave Transients With Electromagnetic Counterparts,
2012
California Institute of Technology
Implementation And Testing Of The First Prompt Search For Gravitational Wave Transients With Electromagnetic Counterparts, J. Abadie, B. P. Abbott, R. Abbott, T. D. Abbott, M. Abernathy, T. Accadia, F. Acernese, C. Adams, R. Adhikari, C. Affeldt, M. Agathos, P. Ajith, B. Allen, G. S. Allen, E. Amador Ceron, D. Amariutei, R. S. Amin, S. B. Anderson, W. G. Anderson, K. Arai, M. A. Arain, M. C. Araya, S. M. Aston, P. Astone, D. Atkinson, P. Aufmuth, C. Aulbert, B. E. Aylott, S. Babak, P. Baker, G. Ballardin, Tiffany Z. Summerscales
Faculty Publications
Aims. A transient astrophysical event observed in both gravitational wave (GW) and electromagnetic (EM) channels would yield rich scientific rewards. A first program initiating EM follow-ups to possible transient GW events has been developed and exercised by the LIGO and Virgo community in association with several partners. In this paper, we describe and evaluate the methods used to promptly identify and localize GW event candidates and to request images of targeted sky locations. Methods. During two observing periods (Dec. 17, 2009 to Jan. 8, 2010 and Sep. 2 to Oct. 20, 2010), a low-latency analysis pipeline was used to identify …
Asteroid Retrieval Feasibility Study,
2012
California Institute of Technology
Asteroid Retrieval Feasibility Study, John Brophy, Fred Culick, Louis Friedman, Pedro Llanos, Et Al.
Publications
This report describes the results of a study sponsored by the Keck Institute for Space Studies (KISS) to investigate the feasibility of identifying, robotically capturing, and returning an entire Near-Earth Asteroid (NEA) to the vicinity of the Earth by the middle of the next decade. The KISS study was performed by people from Ames Research Center, Glenn Research Center, Goddard Space Flight Center, Jet Propulsion Laboratory, Johnson Space Center, Langley Research Center, the California Institute of Technology, Carnegie Mellon, Harvard University, the Naval Postgraduate School, University of California at Los Angeles, University of California at Santa Cruz, University of Southern …
Swift Follow-Up Observations Of Unclassified Asca Sources,
2012
University of Michigan
Swift Follow-Up Observations Of Unclassified Asca Sources, N. Degenaar, R. L. C. Starling, P. A. Evans, A. P. Beardmore, D. N. Burrows, E. M. Cackett, S. Campana, D. Grupe, A. Moretti, C. Pagani, K. L. Page, V. La Parola, R. Wijnands
Physics and Astronomy Faculty Research Publications
We present Swift follow-up observations of a sample of 35 unclassified faint X-ray sources drawn from the ASCA Galactic centre and Galactic plane surveys. Our short, pointed XRT observations allow detections down to a limiting 0.3-10 keV flux of FX ~ 10-13 erg cm-2 s-1, which translates into a luminosity of LX ~ 1033 erg s-1 for an assumed distance of D = 8 kpc. The brightest source in our sample reaches a maximum 0.3-10 keV luminosity of LX ~ 2 × 1036 (D/8 kpc)2 erg s-1 during …
Low Earth Orbiting Photographer (Leop) Cube Satellite,
2012
Utah State University
Low Earth Orbiting Photographer (Leop) Cube Satellite, Jan J. Sojka, J. Alex Landon
Posters
The exploration and study of space is critical for the future of our society, but the opportunities for educational institutions to get involved in space research have faded dramatically in the last decade with the retirement of the space shuttle program. The USU Get Away Special (GAS) team is designing a new, low cost solution to space research, CubeSat (Cube Satellite). This small satellite, with a volume of approximately one liter, will have a high resolution camera directed at earth, and students will be able to request a picture of their area when the satellite flies overhead. In this way, …
A Chandra Survey Of Supermassive Black Holes With Dynamical Mass Measurements,
2012
University of Michigan
A Chandra Survey Of Supermassive Black Holes With Dynamical Mass Measurements, Kayhan Gültekin, Edward M. Cackett, Jon M. Miller, Tiziana Di Matteo, Sera Markoff, Douglas O. Richstone
Physics and Astronomy Faculty Research Publications
We present Chandra observations of 12 galaxies that contain supermassive black holes (SMBHs) with dynamical mass measurements. Each galaxy was observed for 30 ks and resulted in a total of 68 point-source detections in the target galaxies including SMBH sources, ultraluminous X-ray sources (ULXs), and extragalactic X-ray binaries. Based on our fits of the X-ray spectra, we report fluxes, luminosities, Eddington ratios, and slope of the power-law spectrum. Normalized to the Eddington luminosity, the 2-10 keV band X-ray luminosities of the SMBH sources range from 10-8 to 10-6, and the power-law slopes are centered at ~2 with …
Calibrating The Star Endcap Electromagnetic Calorimeter Using Pi-O’S,
2012
Valparaiso University
Calibrating The Star Endcap Electromagnetic Calorimeter Using Pi-O’S, Benjamin Barber
Symposium on Research and Creative Expression (SORCE)
The default energy calibration of the STAR EEMC (Endcap ElectroMagnetic Calorimeter) uses the energy deposition of minimally ionizing particles (MIPs). An alternate method is to use pi-0's. We are reporting a preliminary proof-of-principle calibration method using pi-0's. This method reconstructs the invariant mass of photon pairs, assumed to be resulting from pi-0 decays, using standard two-body kinematics. When many photon pairs are analyzed, a peak is expected in the resulting invariant mass distribution near the pi-0 mass. Using the measured mass of this peak, and the known mass of the pi-0, a minimization routine adjusts the detector gains to optimize …
A Study Of Pixelated Cdznte Detector Setups For Future 0Νββ Decay Searches,
2012
Louisiana State University
A Study Of Pixelated Cdznte Detector Setups For Future 0Νββ Decay Searches, Alexander Leder
Honors Capstones
No abstract provided.
Measurements Of The Angular Cross-Sections Of The Decay Products Of Proton Capture By Lithium-6,
2012
Valparaiso University
Measurements Of The Angular Cross-Sections Of The Decay Products Of Proton Capture By Lithium-6, Benjamin Barber
Symposium on Research and Creative Expression (SORCE)
We have studied the nuclear reaction Li-6 + p => He-3 + He-4 using protons from the 200-keV linear accelerator located in the Manning Nuclear Physics Laboratory in the Neils Science Center. We have measured the angular distribution and energy of the resulting He-3 and He-4 nuclei. Measurements were made using a Si surface barrier detector. The incident proton energy was 125 keV, and the angular measurements were made between 150 and 120 degrees downstream of the beam. Results and highlights are presented.
The Reduction And Reporting Of Data On Proto-Planetary Nebulae From Two Observatories,
2012
Valparaiso University
The Reduction And Reporting Of Data On Proto-Planetary Nebulae From Two Observatories, Wesley Cheek
Symposium on Research and Creative Expression (SORCE)
I am documenting the light variability in a sample of proto-planetary nebulae (PPNs) observed from two observatories. PPNs are stars in the stage of evolution between the AGB and planetary nebula phases. I analyzed the digital images of the data taken on 34 nights from the SARA-South observatory located in Cerro Tololo, Chile along with data taken from the SARA-North Observatory located in Tucson, Arizona. This was done to obtain quantitative measurements of the brightness variations over time. Once I had this information for each object, I plotted light curves, which can be used to document the amplitudes and possible …
Section Abstracts: Astronomy, Mathematics And Physics With Materials Science,
2012
Old Dominion University
Section Abstracts: Astronomy, Mathematics And Physics With Materials Science
Virginia Journal of Science
Abstracts of the Astronomy, Mathematics, and Physics with Material Science Section for the 90th Annual Meeting of the Virginia Academy of Science, May 23-25, 2012, Norfolk State University, Norfolk, Virginia
1112+3548_Nir_Spex,
2012
City University of New York (CUNY)
The S4g Perspective On Circumstellar Dust Extinction Of Asymptotic Giant Branch Stars In M100.,
2012
Max-Planck-Institut für Astronomie
The S4g Perspective On Circumstellar Dust Extinction Of Asymptotic Giant Branch Stars In M100., Sharon Meidt, Eva Schinnerer, Juan Carlos Munoz-Mateos, Benne W. Holwerda, Luis C. Ho, Barry F. Madore, Johan H. Knapen, Albert Bosma, E. Athanassoula, Joannah L. Hinz, Kartik Sheth, Michael Regan, Armando Gil De Paz, Karin Menendez-Delmestre, Mark Seibert, Taehyun Kim, Trisha Mizusawa, Dimitri A. Gadotti, Eija Laurikainen, Heikki Salo, Jarkko Laine, Sebastien Comeron
Faculty and Staff Scholarship
We examine the effect of circumstellar dust extinction on the near-IR (NIR) contribution of asymptotic giant branch (AGB) stars in intermediate-age clusters throughout the disk of M100. For our sample of 17 AGB-dominated clusters we extract optical-to-mid-IR spectral energy distributions (SEDs) and find that NIR brightness is coupled to the mid-IR dust emission in such a way that a significant reduction of AGB light, of up to 1 mag in the K band, follows from extinction by the dust shell formed during this stage. Since the dust optical depth varies with AGB chemistry (C-rich or O-rich), our results suggest that …
The Relationship Between Γ Cassiopeiae’S X-Ray Emission And Its Circumstellar Environment,
2012
Catholic University of America
The Relationship Between Γ Cassiopeiae’S X-Ray Emission And Its Circumstellar Environment, Myron A. Smith, Raimundo Lopes De Oliveira, Christian Motch, Gregory W. Henry, Noel D. Richardson, Karen S. Bjorkman, Philippe Stee, Denis Mourard, John D. Monnier, Xiao Che, R. Bücke, E. Pollmann, Douglas R. Gies, Gail Schaefer, Theo A. Ten Brummelaar, Harold Mcalister, Nils H. Turner, Judit Sturmann, Laszlo Sturmann, Stephen T. Ridgway
Information Systems and Engineering Management Research Publications
γ Cas is the prototypical classical Be star and is recently best known for its variable hard X-ray emission. To elucidate the reasons for this emission, we mounted a multiwavelength campaign in 2010 centered around four XMM-Newton observations. The observational techniques included long baseline optical interferometry (LBOI) from two instruments at CHARA, photometry carried out by an automated photometric telescope and Hα observations. Because γ Cas is also known to be in a binary, we measured radial velocities from the Hα line and redetermined its period as 203.55 ± 0.20 days and its eccentricity as near zero. The LBOI observations …
The Creation And Propagation Of Radiation: Fields Inside And Outside Of Sources,
2012
University of Texas at Brownsville
The Creation And Propagation Of Radiation: Fields Inside And Outside Of Sources, Stanislaw Olbert, John Belcher, Richard H. Price
Physics & Astronomy Faculty Publications
We present an algorithm for computing the electromagnetic fields due to currents inside and outside of finite sources with a high degree of spatial symmetry for arbitrary time-dependent currents. The solutions for these fields do not involve the time derivatives of the currents but involve only the currents and their time integrals. We give solutions for moving planar sheets of charge, and a rotating spherical shell carrying a uniform charge density. We show that the general solutions reduce to the standard expressions for magnetic dipole radiation for slow time variations of the currents. If the currents are turned on very …
The Curious Conundrum Regarding Sulfur Abundances In Planetary Nebulae,
2012
University of Oklahoma
The Curious Conundrum Regarding Sulfur Abundances In Planetary Nebulae, R. B. C. Henry, Angela Speck, Amanda I. Karakas, Gary J. Ferland, Mason Maguire
Physics and Astronomy Faculty Publications
Sulfur abundances derived from optical emission line measurements and ionization correction factors (ICFs) in planetary nebulae are systematically lower than expected for the objects' metallicities. We have carefully considered a large range of explanations for this "sulfur anomaly," including: (1) correlations between the size of the sulfur deficit and numerous nebular and central star properties, (2) ICFs which undercorrect for unobserved ions, (3) effects of dielectronic recombination on the sulfur ionization balance, (4) sequestering of S into dust and/or molecules, and (5) excessive destruction of S or production of O by asymptotic giant branch stars. It appears that all but …
A Quantitative Analysis Of Solar Flare Characteristics As Observed In The Solar Observing Optical Network And The Global Oscillation Network Group,
2012
Air Force Institute of Technology
A Quantitative Analysis Of Solar Flare Characteristics As Observed In The Solar Observing Optical Network And The Global Oscillation Network Group, Thomas M. Wittman
Theses and Dissertations
This study consists of a quantitative comparison of H-alpha solar flare area and brightness as recorded by the Solar Observing Optical Network (SOON) and the Global Oscillation Network Group (GONG) from March 11 through November 30, 2011. The Air Force utilizes the three-site SOON network for H-alpha flare monitoring, while the six-site GONG network, managed by the National Solar Observatory, provides backup H alpha flare monitoring for SOON. A total of 1000 flares were observed and 100 of these were rated larger or brighter than the 0-F category. In the SOON network, 8% of flares observed by two sites had …
Ensemble Forecasting Of Coronal Mass Ejections Using The Wsa-Enlil With Coned Model,
2012
Air Force Institute of Technology
Ensemble Forecasting Of Coronal Mass Ejections Using The Wsa-Enlil With Coned Model, Daniel J. Emmons Ii
Theses and Dissertations
The combination of the Wang-Sheeley-Arge (WSA) coronal model, ENLIL heliospherical model version 2.7, and Coned Model version 1.3 (WSA-ENLIL with Coned Model) was employed to form ensemble forecasts for 15 halo coronal mass ejections (CME's). The input parameter distributions were formed from 100 sets of CME cone parameters derived from the Coned Model. The Coned Model employed image processing along with the bootstrap approach to automatically calculate cone parameter distributions from SOHO-LASCO imagery based on techniques described by Pulkkinen et al. [2010]. The input parameter distributions were used as input to WSA-ENLIL to calculate the temporal evolution of the …
Hadamard Renormalisation Of The Stress Energy Tensor On The Horizons Of A Spherically Symmetric Black Hole Space-Time,
2012
Technological University Dublin
Hadamard Renormalisation Of The Stress Energy Tensor On The Horizons Of A Spherically Symmetric Black Hole Space-Time, Cormac Breen, Adrian Ottewill
Articles
We consider a quantum field which is in a Hartle-Hawking state propagating in a general spherically symmetric black hole space-time. We make use of uniform approximations to the radial equation to calculate the components of the stress tensor, renormalized using the Hadamard form of the Green's function, on the horizons of this space-time. We then specialize these results to the case of the `lukewarm' Reissner-Nordstrom-de Sitter black hole and derive some conditions on the stress tensor for the regularity of the Hartle-Hawking state
