Phase Transitions In Compact Stars

Details Phase Transitions In Compact Stars Phase Transitions In Compact Stars

2004-11-11

arxiv.org/abs/astro-ph/0411295v2

Eur.J.Phys. 26 (2005) 341-360

Astronomy and Astrophysics

Astrophysics

18 pages, 12 figures, refs. added, submitted to Eur. J. Phys

Scientific paper

10.1088/0143-0807/26/3/003

We report on a three--month research project for undergraduate students about the mass-radius relation of compact stars. The equation of state used is constrained at low densities by well-established equations of state of the nuclear phase (the solid crust) and then extended to higher densities with a phenomenological, parametric approach. A first order phase transition from hadronic matter to a phase of higher density, assumed to be quark matter is studied in addition. The mass-radius relation is obtained by solving numerically the Tolman-Oppenheimer-Volkoff equation. We derive some conditions for the existence of a third family of compact stars on the form of the equation of state and its different global properties.

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