Hyperon-rich matter in a two-solar-mass neutron star within the Thomas-Fermi approximation

被引：11
作者：
Mojarrad, M. Ghazanfari [1 ]
Arabsaeidi, R. [1 ]
机构：
[1] Univ Kashan, Dept Phys, POB 87317-51167, Kashan, Iran
来源：
INTERNATIONAL JOURNAL OF MODERN PHYSICS E | 2016年 / 25卷 / 12期
关键词：
Equation of state; hyperon-rich matter; neutron stars; EQUATION-OF-STATE; NUCLEAR PROPERTIES; 3-BODY FORCES; MAXIMUM MASS; PHYSICS;
D O I：
10.1142/S0218301316501020
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
The equation of state (EOS) of hyperon-rich matter for neutron stars (NSs) is investigated in a semi-classical mean-field (MF) model. We present a new generalized baryon-baryon interaction in phase space to derive the EOS by the Thomas-Fermi approximation. Our findings have profound consequences for the structure and properties of NSs. Within this statistical model, the EOS of NS matter with hyperons is stiff enough. Consequently, the results for the maximum mass of NSs are consistent with PSR J1614 - 2230 (1.97 +/- 0.04M(circle dot)) and PSR J0348 + 0432 (2.01 +/- 0.04M(circle dot)). It is also revealed that the hyperon-hyperon interactions slightly soften the EOS.
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页数：17
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