The surface gravitational redshift of the neutron star PSR B2303+46

Xian-Feng Zhao 1*, and Huan-Yu Jia 2
1College of Mechanical and Electronic Engineering, Chuzhou University, Chuzhou 239000, China
2Institute for Modern Physics, Southwest Jiaotong University, Chengdu, 610031, China
Received: 07 October 2013 | Accepted: 03 December 2013

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Abstract

The surface gravitational redshift of the neutron star PSR B2303+46 is investigated within the framework of relativistic mean field theory for the baryon octet system through adjusting the hyperon coupling constants. We obtain any models for the neutron star B2303+46 by choosing suitable hyperon coupling constants xσh and xωh with xρh being determined by SU(6) symmetry and the nucleon coupling constant being chosen as CZ11. Our calculations show that the radius and the surface gravitational redshift of the neutron star PSR B2303+46 are determined as R=12.477~12.493 km and z=0.2184~0.2187, respectively. Our results are not consistent with the recent discovery of the massive neutron star PSR J1614-2230 and PSR J0348+0432.

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Keywords : gravitation - stars: neutron - pulsars: individual: PSR B2303+46