Bulletin of the American Physical Society
85th Annual Meeting of the APS Southeastern Section
Volume 63, Number 19
Thursday–Saturday, November 8–10, 2018; Holiday Inn at World’s Fair Park, Knoxville, Tennessee
Session D05: Poster Session (6:00pm-7:30pm)
6:00 PM,
Thursday, November 8, 2018
Holiday Inn Knoxville Downtown
Room: Atrium
Abstract ID: BAPS.2018.SES.D05.55
Abstract: D05.00055 : Effects of general relativity on nonradial stellar pulsations of compact stars
Presenter:
Abhijit Gupta
(North Carolina School of Science and Mathematics)
Authors:
Abhijit Gupta
(North Carolina School of Science and Mathematics)
S. Reece Boston
(Department of Physics and Astronomy, University of North Carolina-Chapel Hill, Chapel Hill, NC 27599)
Charles R. Evans
(Department of Physics and Astronomy, University of North Carolina-Chapel Hill, Chapel Hill, NC 27599)
Jonathan Bennett
(North Carolina School of Science and Mathematics)
In the present age of space-based photometry, telescopes such as K2 and TESS are providing pulsation frequencies of stellar objects to unprecedented accuracy, requiring equally precise theoretical models correlating these observations to mass- and composition-dependent characteristics of stars. At this precision, relativistic models are required for compact objects such as white dwarfs and neutron stars. We model these stars as polytropes using the Tolman-Oppenheimer-Volkoff equation, and compute relativistic nonradial stellar pulsations around this equilibrium state. Outside the stellar surface, we integrate the Zerilli equation to locate resonant quasinormal modes, where ingoing gravitational radiation vanishes. We compare the frequencies of a subset of these modes to their corresponding pressure-modes in the Newtonian limit, as a function of the strength of relativity inside the star. Our results contribute to our understanding of the impact of general relativity on stellar oscillations, and can be used to determine the conditions under which the Newtonian approximation is justified.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.SES.D05.55
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