Separation of space-time and matter in polar oscillations of compact stars
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AbstractThe dynamics of polar oscillations of compact stars are conventionally described by a set of coupled differential equations and the roles that space-time and matter play in such oscillations are consequently difficult to track. In this paper, we develop a scheme for polar oscillations in terms of one space-time and one matter variables. With our judicious choice of variables, the coupling between space-time and matter is weak, which enables the separation of these two parties. Two independent second-order ordinary differential equations are obtained, corresponding to the Cowling and inverse-Cowling approximations, and leading to accurate determination of p- and w-mode quasi-normal modes, respectively, in a unified framework.
All Author(s) ListZhang YJ, Zhu QQ, Wu J, Chan TK, Leung PT
Journal nameMonthly Notices of the Royal Astronomical Society
Volume Number438
Issue Number4
PublisherOxford University Press (OUP): Policy P - Oxford Open Option A
Pages3222 - 3232
LanguagesEnglish-United Kingdom
Keywordsasteroseismology; equation of state; gravitation; gravitational waves; stars: neutron; stars: oscillations
Web of Science Subject CategoriesAstronomy & Astrophysics; ASTRONOMY & ASTROPHYSICS

Last updated on 2020-19-09 at 01:40