Bulletin of the American Physical Society
Joint Spring 2014 Meeting of the Texas Sections of the APS, AAPT, and Zone 13 of the SPS
Volume 59, Number 2
Thursday–Saturday, March 20–22, 2014; Abilene, Texas
Session S4: Astrophysics II |
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Room: Hunter Welcome Center C |
Saturday, March 22, 2014 10:40AM - 10:52AM |
S4.00001: Observations and Modeling of Two New W UMa Stars Nick Hedlesky W Ursae Majoris (W UMa) binary stars are important in the investigation of the the evolution of close contacting binary stars. ~We present the discovery of two new W UMa binary stars in the boundary between the Lyra and Hercules regions: USNO-B1.0 11159-0266370 and 1154-0266276. Using time sequenced differential photometry and PHOEBE we determined the characteristics and classifications of systems and created a preliminary models, which will be presented. [Preview Abstract] |
Saturday, March 22, 2014 10:52AM - 11:04AM |
S4.00002: Automated asteroid detection and tracking at the Stephen F. Austin State University observatory David Fuls Undiscovered asteroids and those with not well described orbits pose a constant threat to our world. Currently, asteroid detection is primarily carried out by amateur astronomers with small to medium sized (8''-16'') optical instruments. Most observatories devote their large optical instruments to other areas of astronomy research, thus leaving a large section of dim asteroids undetected. We present a plan and progress report for upgrading the 41'' telescope at the Stephen F. Austin State University observatory to automatically scan sections of the sky for asteroids in an attempt to better characterize the orbits of known asteroids and discover new ones. [Preview Abstract] |
Saturday, March 22, 2014 11:04AM - 11:16AM |
S4.00003: Effects of clustering in the equation of state for neutron stars Jared Lalmansingh, Carlos Bertulani, Stefan Typel Neutron stars are highly dense stars - which are almost wholly comprised of neutrons - originating from the aftermath of supernova of Type Ib, Ic or Type II of a massive progenitor star. Of particular interest for the determination of neutron star properties is the thermodynamics for the coexistence of nuclear clusters entering the equation of state of nuclear matter. We present some analytical developments obtained so far. [Preview Abstract] |
Saturday, March 22, 2014 11:16AM - 11:28AM |
S4.00004: Blazhko Effect in a Newly Discovered and a Known RR Lyrae Star Matthew Melendez, Richard Olenick, Arthur Sweeney, Thaddeus Howard, Nick Hedlesky, Anthony Kersting Studies of RR Lyrae stars provide insight into the pulsation processes of variable stars. Several RR Lyrae stars were observed in a wide angle search for extrasolar planets in the boundary between Hercules and Lyra. We present observations of a newly observed RR Lyrae star, USNO-B1.0 1138-0264690, as well as a new perspective on a known RR Lyrae Star, LW Her. Variations in the period and amplitude of RR Lyrae stars, known as the Blazhko effect, were observed found in these stars. The data, analysis, and preliminary dynamical systems modeling of the Blazhko effect in these stars will be presented. [Preview Abstract] |
Saturday, March 22, 2014 11:28AM - 11:40AM |
S4.00005: Stellar oscillations induced by the passage of a fast stellar object M. Naizer, C.A. Bertulani, W. Newton The scattering event between a star and a massive object (such as a black hole or neutron star) results in bulk oscillations in the star. We consider near-miss collisions along a hyperbolic trajectory with impact parameters greater than a grazing collision. Such oscillations are studied and modeled using a simplified quadrupole oscillation model. Such oscillations will lead to a sudden and large luminosity variation of the star. [Preview Abstract] |
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