| GEOPHYSICS, ASTRONOMY, AND ASTROPHYSICS |
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Effects of $\sigma^{\ast }$ and $\varPhi$ mesons on the surface redshift of a neutron star |
| Zhao Xian-Feng(赵先锋)† |
| Department of Electronics Engineering, Chuzhou University, Chuzhou 239000, China |
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Abstract The effects of $\sigma^{\ast}$ and $\varPhi $ mesons on the surface redshift of a neutron star have been investigated within the framework of relativistic mean field theory for the baryon octet {$n,p,\varLambda , \varSigma ^{ - },\varSigma ^{0},\varSigma ^{ + },\varXi ^{ - },\varXi ^{0}$} system. It is found that compared with those without considering the contributions of $\sigma ^{\ast }$ and $\varPhi $ mesons, the surface redshift decreases and that corresponding to the maximum value of the mass also decreases from 0.2540 to 0.2236, about by 12%. Meanwhile, it is also found that including $\sigma ^{\ast }$ and $\varPhi $ mesons, the $M/R$ and that corresponding to the maximum mass decrease.
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Received: 22 April 2010
Revised: 08 October 2010
Accepted manuscript online:
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PACS:
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97.60.Jd
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(Neutron stars)
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26.60.Kp
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(Equations of state of neutron-star matter)
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21.65.Mn
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(Equations of state of nuclear matter)
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| Fund: Project supported by the Science Research Program of Institutions of Higher Education of Anhui Province, China (Grant No. KJ2009B106), the Science Research Program of Chuzhou University, China (Grant No. 2008kj019B), and the Scientific Research Starting Foundation for Doctoral Scientists of Chuzhou University, China. |
Cite this article:
Zhao Xian-Feng(赵先锋) Effects of $\sigma^{\ast }$ and $\varPhi$ mesons on the surface redshift of a neutron star 2011 Chin. Phys. B 20 039701
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