Radial oscillations of neutron stars and strange stars
Všth, H. M.; Chanmugam, G.
Astronomy and Astrophysics (ISSN 0004-6361), vol. 260, no. 1-2, p. 250-254. (A&A Homepage)
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We have determined the two lowest frequency radial oscillation modes constructed for several equations of state. The results for neutron stars differ from those of Glass & Lindblom (1983). We find that the central density where omega0 exp 2 = 0 agrees in our calculations with that where the star reaches its maximal mass, as expected, but contrary to their calculations. The oscillation frequencies of strange stars have a qualitatively different dependence on the central density compared with the case of neutron stars, as the periods of all modes go to zero when the central density of the strange star approaches its smallest possible value.