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2004A&A...420..987B - Astronomy and Astrophysics, volume 420987-991 (2004/6-4)

Surface gravity of neutron stars and strange stars.

BEJGER M. and HAENSEL P.

Abstract (from CDS):

The upper bound on the value of the surface gravity, gs, for neutron stars with equations of state respecting vsound≤c, is derived. This bound is inversely proportional to the maximum allowable mass Mmax, and it reads gs≤1.411x1015(Mmax/M☉)–1cm/s2. It implies an absolute upper bound 7.4x1014cm/s2 if one uses the 2σ lower bound on the neutron mass measured recently in 4U1700-37, 1.9M☉. A correlation between gs and the compactness parameter 2GM/Rc2 for baryonic stars is analyzed. The properties of gs of strange quark stars and its upper bounds are discussed using the scaling properties of the strange-star models.

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Journal keyword(s): dense matter - equation of state - stars: neutron

Simbad objects: 1

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