Density dependence of proton fraction in neutron stars

Citation
Wf. Li et al., Density dependence of proton fraction in neutron stars, HIGH EN P N, 25(8), 2001, pp. 759-764
Citations number
12
Language
CHINESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
HIGH ENERGY PHYSICS AND NUCLEAR PHYSICS-CHINESE EDITION
ISSN journal
0254-3052 → ACNP
Volume
25
Issue
8
Year of publication
2001
Pages
759 - 764
Database
ISI
SICI code
0254-3052(200108)25:8<759:DDOPFI>2.0.ZU;2-D
Abstract
Within the framework of Skyrme-Hartree-Fock theory based on the extended Sk yrme effective interaction, the proton fraction in beta -stable neutron sta rs was investigated for the charge neutrality condition. The density depend ence of symmetry energy strength coefficient was studied with different pot ential parameters, and the behavior of proton fraction in neutron stars at high density for these potential parameters was obtained. The calculated re sults show that the proton fraction disappears at high density for potentia l parameters SII, SIII and SKM, which implies that the pure neutron matter may exist in the interior of neutron stars. It is also found that adding mu ons in neutron stars will increase the proton fraction.