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arXiv · 1712.08856

Examination of the influence of the f$_{0}$(975) and $ϕ$(1020) mesons on the surface gravitional redshift of the neutron star PSR J0348+0432

Xian-Feng Zhao
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Abstract

The effect of the mesons $f_{0}(975)$ and $ϕ(1020)$ on the surface gravitional 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 $f_{0}(975)$ and $ϕ(1020)$, the value range of the radius $R$ of the neutron star PSR J0348+0432 would be changed from a narrow range 12.964 km $\sim$ 12.364 km to a wider range 12.941 km $\sim$ 11.907 km corresponding to the observation mass M=1.97 M$_{\odot}$$\sim$2.05 M$_{\odot}$. We also find that the value range of the surface gravitational redshift $z$ of the neutron star PSR J0348+0432 changes from 0.3469 $\sim$ 0.3997 to 0.3480 $\sim$ 0.4263 corresponding to the observation mass M=1.97 M$_{\odot}$$\sim$2.05 M$_{\odot}$ as the mesons $f_{0}(975)$ and $ϕ(1020)$ being considered. These mean the radius $R$ and the surface gravitational redshift $z$ all will be constrained in a wider scope as the mesons $f_{0}(975)$ and $ϕ(1020)$ 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 $ϕ(1020)$ being considered or not. This indicates that the mesons $f_{0}(975)$ and $ϕ(1020)$ do not play a major role in the massive neutron star PSR J0348+0432.

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Xian-Feng Zhao. 2017-12-23. Examination of the influence of the f$_{0}$(975) and $ϕ$(1020) mesons on the surface gravitional redshift of the neutron star PSR J0348+0432. https://doi.org/10.1103/physrevc.92.055802

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