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Constraints on the properties of the massive neutron star PSR J0348+0432 from the f0(975) and φ(1020) mesons

  • Xian-Feng ZhaoEmail author
Regular Article - Theoretical Physics

Abstract

The effect of the f 0(975) and φ(1020) mesons on the properties of the massive neutron star PSR J0348+0432 is examined in the framework of the relativistic mean-field theory by choosing the suitable hyperon coupling constants. It is found that, compared with that without the f 0(975) and φ(1020) mesons, the radius of the neutron star PSR J0348+0432 increases from R = 12.072 km to R = 12.08 km (i.e. by 0.07%), the central energy density ɛ c decreases from 5.6695 fm−4 to 5.6492 fm−4 (i.e. by 0.36%), the central pressure decreases from 1.585 fm−4 to 1.58 fm−4 (i.e. by 0.32%), the moment of inertia increases from 1.4592 × 1045 g · cm2 to 1.4615 × 1045 g · cm2 (i.e. by 0.16%) and the surface gravitational redshift decreases from z = 0.4026 to z = 0.4022 (i.e. by 0.1%). Our results show that the effect of the f 0(975) and φ(1020) mesons on the properties of the massive neutron star PSR J0348+0432 is very small (i.e. no more than 0.5%) and therefore they do not play a major role.

Keywords

Neutron Star Central Pressure Pling Constant Hybrid Star Massive Neutron Star 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© SIF, Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  1. 1.College of Mechanical and Electronic EngineeringChuzhou UniversityChuzhouChina

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