Open AccessPulsation modes for increasingly relativistic polytropes
Author(s) -
Andersson Nils,
Kokkotas Kostas D.
Publication year - 1998
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1046/j.1365-8711.1998.01541.x
Subject(s) - physics , stars , gravitational wave , relativistic quantum chemistry , gravitation , astrophysics , classical mechanics , quantum mechanics
We present the results of a numerical study of the fluid f, p and the gravitational w modes for increasingly relativistic non‐rotating polytropes. The results for f and w modes are in good agreement with previous data for uniform density stars, which supports an understanding of the nature of the gravitational wave modes based on the uniform density data. We show that the p modes can become extremely long‐lived for some relativistic stars. This effect is attributed to the change in the perturbed density distribution as the star becomes more compact.