Spacetime modes of relativistic stars
Andersson, Nils, Kokkotas, Kostas D. and Schutz, Bernard F. (1996) Spacetime modes of relativistic stars. Monthly Notices of the Royal Astronomical Society, 280, 12301234.
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Description/Abstract
The problem of relativistic stellar pulsations is studied in a somewhat ad hoc approximation that ignores all fluid motions. This {\em Inverse Cowling Approximation} (ICA) is motivated by two observations: 1) For highly damped (wmode) oscillations the fluid plays very little role. 2) If the fluid motion is neglected the problem for polar oscillation modes becomes similar to that for axial modes. Using the ICA we find a polar mode spectrum that has all features of the wmode spectrum of the full problem. Moreover, in the limit of superdense stars, we find the ICA spectrum to be qualitatively similar to that of the axial modes. These results clearly show the importance of general relativity for the pulsation modes of compact stars, and that there are modes whose existence do not depend on motions of the fluid at all; pure ``spacetime'' modes.
Item Type:  Article  

ISSNs:  00358711 (print) 

Related URLs:  
Subjects:  Q Science > QB Astronomy Q Science > QC Physics 

Divisions :  University Structure  Pre August 2011 > School of Mathematics > Applied Mathematics 

ePrint ID:  29417  
Accepted Date and Publication Date: 


Date Deposited:  12 Mar 2007  
Last Modified:  31 Mar 2016 11:55  
URI:  http://eprints.soton.ac.uk/id/eprint/29417 
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