Limiting angular velocity of realistic relativistic neutron star models |
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Authors: | F Weber N K Glendenning |
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Institution: | 1. Nuclear Science Division, Lawrence Berkeley Laboratory, University of California, 94720, Berkeley, CA, USA
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Abstract: | The Keplerian velocity as well as those frequencies at which instability against gravitational radiation-reaction sets in are calculated for rotating neutron star models of gravitational mass 1.5M
. The investigation is based on four different, realistic neutron star matter equations of state. Our results indicate that the gravitational radiation instability sets in wellbelow (i.e., 63–71% of) the Keplerian frequency, and thatyoung neutron stars are limited to rotational periods greater than about 1 ms. In young and therefore hot (T 1010 K) neutron stars them=5(±1) modes and in old stars after being spun up and reheated by mass accretion, them=4 and/orm=3 modes may set the limit on stable rotation.Dedicated to Prof. Dr. H.J. Mang on the occasion of his 60th birthday. |
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Keywords: | PACS" target="_blank">PACS 97 10 Kc 97 60 Jd |
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