Bulletin of the American Physical Society
2007 Joint Spring Meeting of the Texas Sections of APS, AAPT, and SPS
Volume 52, Number 2
Thursday–Saturday, March 22–24, 2007; Abilene, Texas
Session SPS2: SPS II - Astrophysics, Gravitation |
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Chair: Morgan Lynch, Angelo State University Room: Biblical Studies Building 120 |
Friday, March 23, 2007 11:00AM - 11:12AM |
SPS2.00001: Characterization of near earth objects via orbital perturbations: A numerical study Henry Schreiner, Christian Poppeliers It is now recognized that near earth objects (NEOs) may pose a collision risk with the earth. Physical characterization of an NEO may help aid in mitigating collision risks. In this work, we report a potential way to characterize an NEO using non-destructive means. Specifically, by measuring the orbit and orbital perturbations of a fly-by space craft, it may be possible to determine the mass, the aspect ratio, and rotational velocity of an NEO. In this work, we preformed numerical simulations of a spacecraft orbiting an NEO. Tests show that we can extract a visible perturbation signal. Ongoing work will explore the possibility of a relationship between the perturbation signal and the shape of the NEO. [Preview Abstract] |
Friday, March 23, 2007 11:12AM - 11:24AM |
SPS2.00002: Eclipsing Binary Star NP Andromeda Kellie Fletcher |
Friday, March 23, 2007 11:24AM - 11:36AM |
SPS2.00003: The Search for Extra- Solar Planets Billy Quarles |
Friday, March 23, 2007 11:36AM - 11:48AM |
SPS2.00004: The Light Curve of the Rotating Asteroid Kittikul Kovitanggoon |
Friday, March 23, 2007 11:48AM - 12:00PM |
SPS2.00005: Detecting Low Frequency Timing Irregularities in Radio Pulsar Data Cesar Ernesto Cantu, Fredrick A. Jenet Pulsars, particularly millisecond pulsars, are known to be some of the most precise clocks in the universe. Because of their stability, pulsars have been proposed as a means to detect gravitational waves. As it turns out gravitational waves introduce low frequency timing irregularities. Here, we discuss a new technique to detect this low frequency timing irregularities and compared them to standard Fourier Transform based techniques. [Preview Abstract] |
Friday, March 23, 2007 12:00PM - 12:12PM |
SPS2.00006: Testing Pulsar Timing Algorithms by Simulating Pulsar Data Vilma N. Ordu\~na, Fredrick A. Jenet The validity of Einstein's theory of general relativity has a direct relation to the detection of gravitational waves (G-waves). By the observation of radio pulsars, ultra-low frequency G-waves can be characterized and detected. This is possible through pulsar timing which is the measure of the time of arrival (TOA) of individual pulses. The development of a pulsar data simulator will help characterize different timing algorithms and determine which one provides the most accurate measure of the TOAs. This will allow us to improve pulsar timing techniques which will ultimately aid in the detection of G-waves. [Preview Abstract] |
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