TITLE:
Quasi-Radial Modes of Pulsating Neutron Stars: Numerical Results for General-Relativistic Rigidly Rotating Polytropic Models
AUTHORS:
Vassilis Geroyannis, Eleftheria Tzelati
KEYWORDS:
General-Relativistic Polytropic Models, Hartle’s Perturbation Method, Neutron Stars, Quasi-Radial Pulsation Modes, Rigid Rotation
JOURNAL NAME:
International Journal of Astronomy and Astrophysics,
Vol.4 No.3,
August
19,
2014
ABSTRACT: In this paper we compute
general-relativistic polytropic models simulating rigidly rotating, pulsating
neutron stars. These relativistic compact objects, with a radius of ~10 km and
mass between ~1.4 and 3.2 solar masses, are closely related to pulsars. We
emphasize on computing the change in the pulsation eigenfrequencies owing to a
rigid rotation, which, in turn, is a decisive issue for studying stability of
such objects. In our computations, we keep rotational perturbation terms of up
to second order in the angular velocity.