Time evolution of rapidly rotating stratified neutron stars

Details Time evolution of rapidly rotating stratified neutron stars Time evolution of rapidly rotating stratified neutron stars

Oct 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009jphcs.189a2030p&link_type=abstract

Journal of Physics: Conference Series, Volume 189, Issue 1, pp. 012030 (2009).

Physics

Scientific paper

We study the time evolution of non-axisymmetric oscillations of rapidly rotating neutron stars. The rotation is assumed uniform and the stellar models have composition gradients that generate gravity restored oscillation modes. We work in linear Newtonian perturbation theory and in Cowling approximation, i.e. we neglect the gravitational potential perturbations. We study for the first time the behaviour of the inertia-gravity modes in fast spinning stars, and carry out a detailed comparison of non-stratified and stratified models. In particular, we show that each g-mode becomes rotation-dominated, i.e. approaches a particular inertial mode, as the rotation rate of the star is increased.

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