Examination of the influence of the f0(975) and φ(1020) mesons on the surface gravitational redshift of the neutron star PSR J0348+0432

被引：12
作者：
Zhao, Xian-Feng [1 ,2 ]
机构：
[1] Southwest Petr Univ, Sch Sci, Chengdu 610500, Peoples R China
[2] Chuzhou Univ, Sch Elect & Elect Engn, Chuzhou 239000, Peoples R China
来源：
PHYSICAL REVIEW C | 2015年 / 92卷 / 05期
关键词：
MAXIMUM MASS; MATTER; HYPERONS;
D O I：
10.1103/PhysRevC.92.055802
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 effect of the mesons f(0)(975) and phi(1020) on the surface gravitational redshift of the neutron star PSR J0348+0432 is examined in the framework of the relativistic mean field theory by choosing the suitable hyperon coupling constants. We find that compared with that without considering the mesons f0(975) and f(1020), the value range of the radius R of the neutron star PSR J0348+0432 would be changed from a narrow range 12.964 km similar to 12.364 km to a wider range 12.941 km similar to 11.907 km corresponding to the observation mass M = 1.97 M-circle dot similar to 2.05 M-circle dot . We also find that the value range of the surface gravitational redshift z of the neutron star PSR J0348+0432 changes from 0.3469 similar to 0.3997 to 0.3480 similar to 0.4263 corresponding to the observation mass M = 1.97 M-circle dot similar to 2.05 M-circle dot with the mesons f(0)(975) and phi(1020) being considered. This means that the radius R and the surface gravitational redshift z both will be constrained in a wider scope with the mesons f0(975) and f(1020) being considered. We also can see that the difference of the radius and the surface gravitational redshift is not so large whether the mesons f(0)(975) and phi(1020) are considered or not. This indicates that the mesons f(0)(975) and phi(1020) do not play a major role in the massive neutron star PSR J0348+0432.
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页数：5
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