Lagrangian perturbation theory of nonrelativistic rotating superfluid stars

Details Lagrangian perturbation theory of nonrelativistic rotating superfluid stars Lagrangian perturbation theory of nonrelativistic rotating superfluid stars

2004-02-26

arxiv.org/abs/astro-ph/0402640v1

Astronomy and Astrophysics

Astrophysics

10 pages, MNRAS style, no figures

Scientific paper

10.1111/j.1365-2966.2004.08370.x

We develop a Lagrangian perturbation framework for rotating non-relativistic superfluid neutron stars. This leads to the first generalization of classic work on the stability properties of rotating stars to models which account for the presence of potentially weakly coupled superfluid components. Our analysis is based on the standard two-fluid model expected to be relevant for the conditions that prevail in the outer core of mature neutron stars. We discuss the implications of our results for dynamical and secular instabilities of a simple neutron star model in which the two fluids are allowed to assume different (uniform) rotation rates.

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