Modeling Hybrid Stars with an SU(3) non-linear sigma model

Details Modeling Hybrid Stars with an SU(3) non-linear sigma model Modeling Hybrid Stars with an SU(3) non-linear sigma model

2010-06-02

arxiv.org/abs/1006.0380v3

Phys.Rev.C82:035803,2010

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

Revised version, references and figures added. Accepted for publication in Physical Review C

Scientific paper

10.1103/PhysRevC.82.035803

We study the behavior of hybrid stars using an extended hadronic and quark SU(3) non-linear sigma model. The degrees of freedom change naturally, in this model, from hadrons to quarks as the density/temperature increases. At zero temperature, we reproduce massive neutron stars containing a core of hybrid matter of 2 km for the non-rotating case and 1.18 km and 0.87 km, in the equatorial and polar directions respectively, for stars rotating at the Kepler frequency (physical cases lie in between). The cooling of such stars is also analyzed.

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