Entropy & equation of state (EOS) for hot bare strange stars

Details Entropy & equation of state (EOS) for hot bare strange stars Entropy & equation of state (EOS) for hot bare strange stars

2000-03-31

arxiv.org/abs/astro-ph/0003472v2

Astron.Astrophys.364:L89,2000

Astronomy and Astrophysics

Astrophysics

4 pages, including 4 figures

Scientific paper

Compactness of some stars is explained if they are strange stars (SS) as shown by Dey et al. (1998) (D98) and Li et al. (1999a). One of these compact star candidates is the SAX J1808.4-3658 (SAX in short) believed to be an important link in the genesis of radio pulsars. SS have also been suggested for bursting X-ray pulsars (GRO J1744-28, Cheng et al. 1998), from quasi-periodic oscillations (QPO) of X-ray binaries (4U 1728-34, Li et al. 1999b) and from peculiarity of properties of radio pulsars (PSR 0943+10, Xu et al.1999; Kapoor et al. 2000). We now extend the calculation to include high temperatures upto T = 70 MeV ~ 8 times 10^{11} ^oK and find that the nature of the mass (M) and radius (R), derived from astrophysical data, is still retained. The entropy is calculated and matches onto that calculated from hadronic models thus supporting the idea that the quark-hadron transition may be continuous.

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