The g-mode spectrum of reactive neutron star cores. (arXiv:1905.00010v1 [gr-qc])
<a href="http://arxiv.org/find/gr-qc/1/au:+Andersson_N/0/1/0/all/0/1">N. Andersson</a>, <a href="http://arxiv.org/find/gr-qc/1/au:+Pnigouras_P/0/1/0/all/0/1">P. Pnigouras</a>
We discuss the impact of nuclear reactions on the spectrum of gravity g-modes
of a mature neutron star, demonstrating the anticipated disappearance of these
modes when the timescale associated with the oscillations is longer than that
of nuclear reactions. This is the expected result, but different aspects of the
demonstration may be relevant for related problems in neutron star
astrophysics. In particular, we develop the framework required for an explicit
implementation of finite-time nuclear reactions in neutron star oscillation
problems and demonstrate how this formulation connects with the usual bulk
viscosity prescription. We also discuss implications of the absence of very
high order g-modes for problems of astrophysical relevance.
We discuss the impact of nuclear reactions on the spectrum of gravity g-modes
of a mature neutron star, demonstrating the anticipated disappearance of these
modes when the timescale associated with the oscillations is longer than that
of nuclear reactions. This is the expected result, but different aspects of the
demonstration may be relevant for related problems in neutron star
astrophysics. In particular, we develop the framework required for an explicit
implementation of finite-time nuclear reactions in neutron star oscillation
problems and demonstrate how this formulation connects with the usual bulk
viscosity prescription. We also discuss implications of the absence of very
high order g-modes for problems of astrophysical relevance.
http://arxiv.org/icons/sfx.gif
