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Describing neutron stars by the relativistic mean field theory |
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| Authors: | Huan-yu Jia Bao-xi Sun Jie Meng En-guang Zhao |
| Institution: | a Department of Technical Physics, Peking University, Beijing 100871, People's Republic of China b Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100080, People's Republic of China c Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator, Lanzhou 730000, People's Republic of China |
| Abstract: | Neutron stars are studied in the framework of the relativistic mean field theory of interacting nucleons, hyperons, and mesons. Within the hadronic freedom, the cores of neutron stars are found to be dominated by hyperons when the density is sufficiently high. The influence of hyperon coupling constants on the transition from a neutron star to a hyperon-dominated strange neutron star is also investigated. It is found that the transition density gets its minimum value when the ratio of hyperon coupling constant to nucleon's takes the value of 0.65, and the calculated maximum mass of the neutron star is 1.4 M which lies within the range of the observational results. |
| Keywords: | stars: neutron—equation of state—relativity |
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