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Chinese Physics C > 2014, Vol. 38 > Issue(1): 015101 DOI: 10.1088/1674-1137/38/1/015101

Transition density of the large mass hyperon star

  • The difference between the transition density of a larger mass hyperon star (for example, the neutron star PSR J1614-2230) and that of a smaller mass hyperon star is investigated in the framework of the relativistic mean field theory. We see that the transition density ρ 0Hincreases with the increase of x ω(i.e. the mass of the neutron star). For the nucleons parts, the neutrons make the main contribution to the transition density as the baryon density ρ= ρ 0H. With the increase of the x ω(i.e. the mass of the neutron star), the relative particle number density of neutrons decreases while that of protons increases. For the parts of hyperons, the Λ and Ξ -make the main contributions to the transition density as the baryon density ρ= ρ 0H. The relative particle number density of Λ decreases while that of Ξ -increases with the increase of the x ω(i.e. the mass of the neutron star). For the hyperons Σ -, Σ 0and Σ -, the total contributions are less than 16 per cent.
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ZHAO Xian-Feng and JIA Huan-Yu. Transition density of the large mass hyperon star[J]. Chinese Physics C, 2014, 38(1): 015101. doi: 10.1088/1674-1137/38/1/015101
ZHAO Xian-Feng and JIA Huan-Yu. Transition density of the large mass hyperon star[J]. Chinese Physics C, 2014, 38(1): 015101. doi:10.1088/1674-1137/38/1/015101 shu
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Received: 2012-12-03
Revised: 1900-01-01
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    Transition density of the large mass hyperon star

      Corresponding author:ZHAO Xian-Feng,
    • Received Date:2012-12-03
    • Accepted Date:1900-01-01
    • Available Online:2014-01-05

      Abstract:The difference between the transition density of a larger mass hyperon star (for example, the neutron star PSR J1614-2230) and that of a smaller mass hyperon star is investigated in the framework of the relativistic mean field theory. We see that the transition density ρ0Hincreases with the increase ofxω(i.e. the mass of the neutron star). For the nucleons parts, the neutrons make the main contribution to the transition density as the baryon densityρ=ρ0H. With the increase of thexω(i.e. the mass of the neutron star), the relative particle number density of neutrons decreases while that of protons increases. For the parts of hyperons, the Λ and Ξ-make the main contributions to the transition density as the baryon densityρ=ρ0H. The relative particle number density of Λ decreases while that of Ξ-increases with the increase of thexω(i.e. the mass of the neutron star). For the hyperons Σ-, Σ0and Σ-, the total contributions are less than 16 per cent.

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