Krüger Christian J, Kokkotas Kostas D
Theoretical Astrophysics, IAAT, University of Tübingen, 72076 Tübingen, Germany.
Department of Physics, University of New Hampshire, 9 Library Way, Durham, New Hampshire 03824, USA.
Phys Rev Lett. 2020 Sep 11;125(11):111106. doi: 10.1103/PhysRevLett.125.111106.
We study oscillations and instabilities of relativistic stars using perturbation theory in general relativity and take into account the contribution of a dynamic spacetime. We present the oscillation spectrum as well as the critical values for the onset of the secular CFS instability of neutron stars, and propose universal relations for gravitational wave asteroseismology, which may help constrain the neutron star radius and/or the nuclear equation of state. The results are relevant for all stages during a neutron star's life but especially to nascent or remnant objects following a binary merger.
我们运用广义相对论中的微扰理论研究相对论性恒星的振荡和不稳定性，并考虑动态时空的贡献。我们给出了振荡谱以及中子星长期CFS不稳定性开始的临界值，并提出了引力波星震学的通用关系，这可能有助于约束中子星半径和/或核态方程。这些结果与中子星生命的所有阶段都相关，但尤其适用于双星合并后的新生或残余天体。
