Fast rotation of neutron stars and equation of state of dense matter

Details Fast rotation of neutron stars and equation of state of dense matter Fast rotation of neutron stars and equation of state of dense matter

2008-05-13

arxiv.org/abs/0805.1820v1

New Astronomy Reviews, 51, 785-790 (2008)

Astronomy and Astrophysics

Astrophysics

7 pages, 7 figures, proceedings of the "Jean-Pierre Lasota, X-ray binaries, accretion disks and compact stars" conference, edi

Scientific paper

10.1016/j.newar.2008.03.007

Fast rotation of compact stars (at submillisecond period) and, in particular, their stability, are sensitive to the equation of state (EOS) of dense matter. Recent observations of XTE J1739-285 suggest that it contains a neutron star rotating at 1122 Hz (Kaaret et al. 2007). At such rotational frequency the effects of rotation on star's structure are significant. We study the interplay of fast rotation, EOS and gravitational mass of a submillisecond pulsar. We discuss the EOS dependence of spin-up to a submillisecond period, via mass accretion from a disk in a low-mass X-ray binary.

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