Fast Rotating Neutron Stars: Oscillations and Instabilities

Frontiers in Astronomy and Space Sciences

Sebastian H. Völkel¹  Christian J. Krüger³  Kostas D. Kokkotas³  Praveen Manoharan³ 

[1] IFPU, Trieste, Italy;SISSA, INFN Sezione di Trieste, Trieste, Italy;Theoretical Astrophysics, IAAT, University of Tübingen, Tübingen, Germany;

关键词: neutron star;    equation of state;    stars;    rotation;    stars;    Bayesiah analysis;   

DOI  :  10.3389/fspas.2021.736918

来源: DOAJ

【 摘 要 】

In this review article, we present the main results from our most recent research concerning the oscillations of fast rotating neutron stars. We derive a set of time evolution equations for the investigation of non-axisymmetric oscillations of rapidly rotating compact objects in full general relativity, taking into account the contribution of a dynamic spacetime. Using our code, which features high accuracy at comparably low computational expense, we are able to extract the frequencies of non-axisymmetric modes of compact objects with rotation rates up to the Kepler limit. We propose various universal relations combining bulk properties of isolated neutron stars as well as of binary systems before and after merger; these relations are independent of the true equation of state and may serve as a valuable tool for gravitational wave asteroseismology. We also present an introductory example using a Bayesian analysis.

【 授权许可】

Unknown