Volume 559, November 2013
|Number of page(s)||10|
|Section||Stellar structure and evolution|
|Published online||26 November 2013|
Neutron star properties with unified equations of state of dense matter⋆
Institut d’Astronomie et d’Astrophysique, CP226, Université Libre de
2 Dépt. de Physique, Université de Montréal, Montréal (Québec), H3C 3J7, Canada
Accepted: 5 August 2013
Aims. In this paper, we study the global properties of neutron stars (NSs), as predicted by the Brussels-Montreal equations of state (EoSs). These EoSs, which provide a unified description of all regions of a NS, are based on the generalised Skyrme functionals BSk19, BSk20, and BSk21 that were simultaneously fitted to almost all the nuclear mass data and constrained to reproduce various properties of infinite nuclear matter, as obtained from microscopic calculations.
Methods. We solved Einstein’s equations of general relativity for both non-rotating and rigidly rotating NSs using these unified EoSs.
Results. The NS properties thus obtained are compared with various astrophysical observations. We find that only the stiffest EoS, based on the functional BSk21, is compatible with all the constraints inferred from these observations.
Key words: stars: neutron / equation of state / gravitation / dense matter / methods: numerical
Tables of the equations of state are only available at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (220.127.116.11) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/559/A128
© ESO, 2013
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