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Neutron stars including the effects of chaotic magnetic fields and anomalous magnetic moments

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【作者】 吴飞； 吴琛； 任中洲；

【Author】 Fei Wu;Chen Wu;Zhong-Zhou Ren;Physics Department,Nanjing University;Shanghai Institute of Applied Physics,Chinese Academy of Science;Center of Theoretical Nuclear Physics,National Laboratory of Heavy-Ion Accelerator;Kavli Institute for Theoretical Physics China,Chinese Academy of Sciences;

【机构】 Physics Department,Nanjing University； Shanghai Institute of Applied Physics,Chinese Academy of Science； Center of Theoretical Nuclear Physics,National Laboratory of Heavy-Ion Accelerator； Kavli Institute for Theoretical Physics China,Chinese Academy of Sciences；

【摘要】 The relativistic mean field（RMF） FSUGold model extended to include hyperons is employed to study the properties of neutron stars with strong magnetic fields.The chaotic magnetic field approximation is utilized.The effect of anomalous magnetic moments（AMMs） is also investigated.It is shown that the equation of state（EOS）of neutron star matter is stiffened by the presence of the magnetic field,which increases the maximum mass of a neutron star by around 6%.The AMMs only have a small influence on the EOS of neutron star matter,and increase the maximum mass of a neutron star by 0.02Msun.Neutral particles are spin polarized due to the presence of the AMMs.

【Abstract】 The relativistic mean field（RMF） FSUGold model extended to include hyperons is employed to study the properties of neutron stars with strong magnetic fields.The chaotic magnetic field approximation is utilized.The effect of anomalous magnetic moments（AMMs） is also investigated.It is shown that the equation of state（EOS）of neutron star matter is stiffened by the presence of the magnetic field,which increases the maximum mass of a neutron star by around 6%.The AMMs only have a small influence on the EOS of neutron star matter,and increase the maximum mass of a neutron star by 0.02Msun.Neutral particles are spin polarized due to the presence of the AMMs.

【关键词】 magnetic field； neutron stars； equation of state；
【Key words】 magnetic field； neutron stars； equation of state；
【基金】 Supported by National Natural Science Foundation of China(11535004,11375086,11120101005,11175085,11235001);973 National Major State Basic Research and Development of China(2013CB834400);Science and Technology Development Fund of Macau(068/2011/A)
  • 【文献出处】 Chinese Physics C ,中国物理C , 编辑部邮箱 ,2017年04期
  • 【分类号】O412.3
  • 【下载频次】20
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