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YU Zi, DING Wen-bo. Effect of Hyperon Couplings on Thermal Protoneutron Star Matter[J]. Nuclear Physics Review, 2011, 28(3): 272-275. doi: 10.11804/NuclPhysRev.28.03.272
Citation: YU Zi, DING Wen-bo. Effect of Hyperon Couplings on Thermal Protoneutron Star Matter[J]. Nuclear Physics Review, 2011, 28(3): 272-275. doi: 10.11804/NuclPhysRev.28.03.272
shu

Effect of Hyperon Couplings on Thermal Protoneutron Star Matter

doi: 10.11804/NuclPhysRev.28.03.272

  • 1 College of science, Nanjing Forestry University, Nanjing 210037, China;2 Physics Department of Bohai University, Jinzhou 121000, Liaoning, China

  • Received Date: 1900-01-01
  • Rev Recd Date: 1900-01-01
  • Publish Date: 2011-09-20
  • In the framework of the relativistic mean field theory(RMFT), protoneutron stars with hyperons are studied. To be compatible with neutron star masses, the hyperon scalar coupling χσ should lie in the range of 0.33—0.77. As the hyperon scalar coupling increases, in protoneutron star matter, the core temperature increases whereas the abundance of neutrinos decreases. The metastable mass range of protoneutron stars narrows as the temperature increases. It is found that a protoneutron star cannot subside into a low mass black hole when χσ>0.75. Furthermore, the case of SN1987A is discussed.
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Effect of Hyperon Couplings on Thermal Protoneutron Star Matter

doi: 10.11804/NuclPhysRev.28.03.272
  • 1 College of science, Nanjing Forestry University, Nanjing 210037, China;2 Physics Department of Bohai University, Jinzhou 121000, Liaoning, China
  • Received Date: 1900-01-01
  • Rev Recd Date: 1900-01-01
  • Publish Date: 2011-09-20

Abstract: In the framework of the relativistic mean field theory(RMFT), protoneutron stars with hyperons are studied. To be compatible with neutron star masses, the hyperon scalar coupling χσ should lie in the range of 0.33—0.77. As the hyperon scalar coupling increases, in protoneutron star matter, the core temperature increases whereas the abundance of neutrinos decreases. The metastable mass range of protoneutron stars narrows as the temperature increases. It is found that a protoneutron star cannot subside into a low mass black hole when χσ>0.75. Furthermore, the case of SN1987A is discussed.

YU Zi, DING Wen-bo. Effect of Hyperon Couplings on Thermal Protoneutron Star Matter[J]. Nuclear Physics Review, 2011, 28(3): 272-275. doi: 10.11804/NuclPhysRev.28.03.272
Citation: YU Zi, DING Wen-bo. Effect of Hyperon Couplings on Thermal Protoneutron Star Matter[J]. Nuclear Physics Review, 2011, 28(3): 272-275. doi: 10.11804/NuclPhysRev.28.03.272
shu

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