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arXiv · 1804.03351

The restriction of $σ^{*}$ and $ϕ$ on the protoneutron stars PSR J0348+0432

Bin Hong·Zhong-Zhou Ren
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Abstract

The restriction of $σ^{*}$ and $ϕ$ on the protoneutron star (PNS) PSR J0348+0432 is described by the relativistic mean field theory (RMFT) through choosing the effective coupling constants. We use an entropy per baryon S=1 to describe thermal effect on PSR J0348+0432 in this work and compare the differences between PNS PSR J0348+0432 with $σ^{*}$,$ϕ$ and without $σ^{*}$,$ϕ$. These effects include the particle number distribution, the mass-radius relation, the moment of inertia and the surface gravitational redshift. The PNS PSR J0348+0432 with $σ^{*}$ and $ϕ$ has more nucleons and will pushed forward the threshold for the appearance of the hyperons. The mass-radius relations are ($2.010M_{\odot}$,12.6520km) with $σ^{*}$ and $ϕ$ and ($2.010M_{\odot}$,12.6170km) without $σ^{*}$ and $ϕ$ respectively. The moment of inertia corresponding PNS PSR J0348+0432 are ($2.010M_{\odot}$,1.510$\times 10^{45}$g.cm$^{2}$) and ($2.010M_{\odot}$,1.559$\times 10^{45}$g.cm$^{2}$) respectively, the surface gravitational redshift corresponding PNS PSR J0348+0432 are ($2.010M_{\odot}$,0.3747) and ($2.010M_{\odot}$,0.3701) respectively. With the help of these calculations, we study the restriction of $σ^{*}$ and $ϕ$ on the interactions between baryons in PNS core.

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Bin Hong, Zhong-Zhou Ren. 2018-04-10. The restriction of $σ^{*}$ and $ϕ$ on the protoneutron stars PSR J0348+0432. https://doi.org/10.1088/1674-1137%2F42%2F8%2F084105

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