Oscillations of rapidly rotating stratified neutron stars
Passamonti, A., Haskell, B., Andersson, N., Jones, D.I. and Hawke, I. (2009) Oscillations of rapidly rotating stratified neutron stars. Monthly Notices of the Royal Astronomical Society, 394, (2), 730-741. (doi:10.1111/j.1365-2966.2009.14408.x)
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Official URL: http://dx.doi.org/10.1111/j.1365-2966.2009.14408.x
Description/Abstract
We use time-evolutions of the linear perturbation equations to study the oscillations of rapidly rotating neutrons stars. Our models account for the buoyancy due to composition
gradients and we study, for the first time, the nature of the resultant g-modes in a fast spinning star. We provide detailed comparisons of non-stratified and stratified models. This leads to an improved understanding of the relationship between the
inertial modes of a non-stratified star and the g-modes of a stratified system. In particular, we demonstrate that each g-mode becomes rotation-dominated, i.e. approaches
a particular inertial mode, as the rotation rate of the star is increased. We also discuss issues relating to the gravitational-wave driven instability of the various classes of oscillation modes.
| Item Type: | Article |
|---|---|
| ISSN: | 0035-8711 (print) |
| Uncontrolled Keywords: | methods: numerical, stars: neutron, stars: oscillation, stars: rotation |
| Related URLs: | http://arxiv.org/abs/0807.3457 http://dx.doi.org/10.1111/j.13...09.14408.x |
| Subjects: | Q Science > QB Astronomy Q Science > QA Mathematics Q Science > QC Physics |
| Divisions: | University Structure - Pre August 2011 > School of Mathematics > Applied Mathematics |
| ePrint ID: | 54978 |
| Deposited On: | 04 Aug 2008 |
| Last Modified: | 01 Jun 2011 01:31 |
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