Quark matter in compact stars: astrophysical implications and possible signatures

Details Quark matter in compact stars: astrophysical implications and possible signatures Quark matter in compact stars: astrophysical implications and possible signatures

2008-09-24

arxiv.org/abs/0809.4228v1

Proceedings of "the Eleventh Marcel Grossman Meeting on General Relativity", Edited by H. Kleinert, R.T. Jantzen and R. Ruffin

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

Invited talk at "the Eleventh Marcel Grossman Meeting on General Relativity", Berlin 2006

Scientific paper

After a brief non technical introduction of the basic properties of strange quark matter (SQM) in compact stars, we consider some of the late important advances in the field, and discuss some recent astrophysical observational data that could shed new light on the possible presence of SQM in compact stars. We show that above a threshold value of the gravitational mass a neutron star (pure hadronic star) is metastable to the decay (conversion) to an hybrid neutron star or to a strange star. We explore the consequences of the metastability of "massive" neutron stars and of the existence of stable compact "quark" stars (hybrid neutron stars or strange stars) on the concept of limiting mass of compact stars, and we give an extension of this concept with respect to the "classical" one given in 1939 by Oppenheimer and Volkoff.

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