Volume 97, Number 3, February 2012
|Number of page(s)||5|
|Section||Geophysics, Astronomy and Astrophysics|
|Published online||06 February 2012|
On the maximum mass of hyperonic neutron stars
Institut de Physique Nucléaire, IN2P3-CNRS and Université Paris-Sud - F-91406 Orsay Cedex, France, EU
2 Département de physique, École Normale Supérieure - 24 rue Lhomond, F-75231 Paris Cedex 05, France, EU
3 IPN Lyon, Université de Lyon, Univ. Lyon 1, CNRS/IN2P3, UMR5822 F-69622 Villeurbanne Cedex, France, EU
Accepted: 2 January 2012
Chiral Lagrangian and quark-meson coupling models of hyperon matter are used to estimate the maximum mass of neutron stars. Our relativistic calculations include, for the first time, both Hartree and Fock contributions in a consistent manner. Being related to the underlying quark structure of baryons, these models are considered to be good candidates for describing the dense core of neutron stars. Taking account of the known experimental constraints at saturation density, the equations of state deduced from these relativistic approaches cannot sustain a neutron star with a mass larger than 1.6–1.66M⊙.
PACS: 97.60.Jd – Neutron stars / 26.60.Kp – Equations of state of neutron-star matter
© EPLA, 2012
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