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Chinese Physics C> 2018, Vol. 42> Issue(8) : 084105 DOI: 10.1088/1674-1137/42/8/084105

Effects of σ* and φ on the proto-neutron star PSR J0348+0432

  • 1.

      Department of Physics, Nanjing University, Nanjing 210008, China

  • 2.

     Department of Physics, Nanjing University, Nanjing 210008, China

  • 3.

     School of Physics Science and Engineering, Tongji University, Shanghai 200092, China

  • The influence of σ* and φ on the proto-neutron star (PNS) PSR J0348+0432 is described by the relativistic mean field theory (RMFT) through choosing effective coupling constants. We use an entropy per baryon S=1 to describe the thermal effects on PSR J0348+0432 in this work and compare this PNS with and without σ*, φ. These effects include the particle number distribution, mass-radius relation, moment of inertia and surface gravitational redshift. The PNS PSR J0348+0432 with σ* and φ has more nucleons and will push forward the threshold for the appearance of the hyperons. The mass-radius relations are (2.010M⊙, 12.6520 km) with σ* and φ and (2.010M⊙, 12.6170 km) without σ* and φ. The moments of inertia corresponding to PNS PSR J0348+0432 are (2.010M⊙, 1.510×1045 g·cm2) and (2.010M⊙, 1.559×1045 g·cm2) respectively, and the surface gravitational redshifts are (2.010M⊙, 0.3747) and (2.010M⊙, 0.3701) respectively. With the help of these calculations, we study the restriction of σ* and φ on the interactions between baryons in the PNS core.
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  • References

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Bin Hong and Zhong-Zhou Ren. Effects of σ* and φ on the proto-neutron star PSR J0348+0432[J]. Chinese Physics C, 2018, 42(8): 084105. doi: 10.1088/1674-1137/42/8/084105
Bin Hong and Zhong-Zhou Ren. Effects of σ* and φ on the proto-neutron star PSR J0348+0432[J]. Chinese Physics C, 2018, 42(8): 084105.  doi: 10.1088/1674-1137/42/8/084105 shu
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Received: 2018-05-03
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    Supported by National Natural Science Foundation of China (11535004, 11761161001) and the National Major State Basic Research and Development Program of China (2016YFE0129300)

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Effects of σ* and φ on the proto-neutron star PSR J0348+0432

  • 1.  Department of Physics, Nanjing University, Nanjing 210008, China
  • 2. Department of Physics, Nanjing University, Nanjing 210008, China
  • 3. School of Physics Science and Engineering, Tongji University, Shanghai 200092, China
  • Received Date: 2018-05-03
  • Available Online: 2018-08-05
Fund Project:  Supported by National Natural Science Foundation of China (11535004, 11761161001) and the National Major State Basic Research and Development Program of China (2016YFE0129300)

Abstract: The influence of σ* and φ on the proto-neutron star (PNS) PSR J0348+0432 is described by the relativistic mean field theory (RMFT) through choosing effective coupling constants. We use an entropy per baryon S=1 to describe the thermal effects on PSR J0348+0432 in this work and compare this PNS with and without σ*, φ. These effects include the particle number distribution, mass-radius relation, moment of inertia and surface gravitational redshift. The PNS PSR J0348+0432 with σ* and φ has more nucleons and will push forward the threshold for the appearance of the hyperons. The mass-radius relations are (2.010M⊙, 12.6520 km) with σ* and φ and (2.010M⊙, 12.6170 km) without σ* and φ. The moments of inertia corresponding to PNS PSR J0348+0432 are (2.010M⊙, 1.510×1045 g·cm2) and (2.010M⊙, 1.559×1045 g·cm2) respectively, and the surface gravitational redshifts are (2.010M⊙, 0.3747) and (2.010M⊙, 0.3701) respectively. With the help of these calculations, we study the restriction of σ* and φ on the interactions between baryons in the PNS core.

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