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WEN Dehua, JING Zhenzhen. Mechanics for Soft EOSs Supporting Massive Neutron Stars[J]. Nuclear Physics Review, 2014, 31(3): 359-365. doi: 10.11804/NuclPhysRev.31.03.359
Citation: WEN Dehua, JING Zhenzhen. Mechanics for Soft EOSs Supporting Massive Neutron Stars[J]. Nuclear Physics Review, 2014, 31(3): 359-365. doi: 10.11804/NuclPhysRev.31.03.359
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Mechanics for Soft EOSs Supporting Massive Neutron Stars

doi: 10.11804/NuclPhysRev.31.03.359

  • Department of Physics, South China University of Technology, Guangzhou 510641, China

  • Received Date: 1900-01-01
  • Rev Recd Date: 1900-01-01
  • Publish Date: 2014-09-20
  • The analysis of the laboratory data from the heavy-ion collisions and the correlated theoretical research prefer a soft equation of state (EOS) for the unsymmetric dense matters; and the presence of hyperons at density exceeding 2~3 times of normal nuclear density 0 also may soften the EOS of the dense matters.But a soft EOS cannot support a massive neutron star. After the observation of pulsar PSR J1614-2230 with a mass of (1.97±0.04) M⊙, we have to face this intractable contradiction. In order to solve this contradiction,people have proposed several possible mechanisms, including the modified gravity theory, the modified models for the description of the dense matters and so on. This paper has reviewed these mechanisms. In addition, we also calculated and discussed the effect of the strong electromagnetic field on the maximum mass of the neutron stars. It is found that the strong electromagnetic field can increase the maximum mass of the neutron stars efficaciously.
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Mechanics for Soft EOSs Supporting Massive Neutron Stars

doi: 10.11804/NuclPhysRev.31.03.359
  • Department of Physics, South China University of Technology, Guangzhou 510641, China
  • Received Date: 1900-01-01
  • Rev Recd Date: 1900-01-01
  • Publish Date: 2014-09-20

Abstract: The analysis of the laboratory data from the heavy-ion collisions and the correlated theoretical research prefer a soft equation of state (EOS) for the unsymmetric dense matters; and the presence of hyperons at density exceeding 2~3 times of normal nuclear density 0 also may soften the EOS of the dense matters.But a soft EOS cannot support a massive neutron star. After the observation of pulsar PSR J1614-2230 with a mass of (1.97±0.04) M⊙, we have to face this intractable contradiction. In order to solve this contradiction,people have proposed several possible mechanisms, including the modified gravity theory, the modified models for the description of the dense matters and so on. This paper has reviewed these mechanisms. In addition, we also calculated and discussed the effect of the strong electromagnetic field on the maximum mass of the neutron stars. It is found that the strong electromagnetic field can increase the maximum mass of the neutron stars efficaciously.

WEN Dehua, JING Zhenzhen. Mechanics for Soft EOSs Supporting Massive Neutron Stars[J]. Nuclear Physics Review, 2014, 31(3): 359-365. doi: 10.11804/NuclPhysRev.31.03.359
Citation: WEN Dehua, JING Zhenzhen. Mechanics for Soft EOSs Supporting Massive Neutron Stars[J]. Nuclear Physics Review, 2014, 31(3): 359-365. doi: 10.11804/NuclPhysRev.31.03.359
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