Volume 428, Number 1, December II 2004
|Page(s)||191 - 197|
|Section||Stellar structure and evolution|
|Published online||23 November 2004|
Analytical representations of unified equations of state of neutron-star matter
N. Copernicus Astronomical Center, Polish Academy of Sciences, Bartycka 18, 00-716 Warszawa, Poland e-mail: email@example.com
2 Ioffe Physico-Technical Institute, Politekhnicheskaya 26, 194021 St. Petersburg, Russia
3 Isaac Newton Institute of Chile, St. Petersburg Branch, Russia
Accepted: 7 August 2004
Analytical representations are derived for two equations of state (EOSs) of neutron-star matter: FPS and SLy. Each of these EOSs is unified, that is, it describes the crust and the core of a neutron star using the same physical model. Two versions of the EOS parametrization are considered. In the first one, pressure and mass density are given as functions of the baryon density. In the second version, pressure, mass density, and baryon density are given as functions of the pseudo-enthalpy, which makes this representation particularly useful for 2-D calculations of stationary rotating configurations of neutron stars.
Key words: equation of state / dense matter / stars: neutron
© ESO, 2004
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