Large-mass neutron stars with hyperonization

Research paper by Wei-Zhou Jiang, Bao-An Li, Lie-Wen Chen

Indexed on: 19 Aug '12Published on: 19 Aug '12Published in: arXiv - Astrophysics - Solar and Stellar Astrophysics

Abstract

Within a density-dependent relativistic mean-field model using in-medium meson-hadron coupling constants and meson masses, we explore effects of in-medium hyperon interactions on properties of neutron stars. It is found that the hyperonic constituents in large-mass neutron stars can not be simply ruled out, while the recently measured mass of the millisecond pulsar J1614-2230 can constrain significantly the in-medium hyperon interactions. Moreover, effects of nuclear symmetry energy on hyperonization in neutron stars are also discussed.