| 均匀强磁场中中子星物质的物态方程 |
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| 引用本文： | 陈伟,刘良钢.均匀强磁场中中子星物质的物态方程[J].中国物理 C,2005,29(2):119-123. |
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| 作者姓名： | 陈伟 刘良钢 |
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| 作者单位： | [1]暨南大学理工学院物理系，广州510632 [2]中山大学理工学院物理系，广州510275 |
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| 基金项目： | 国家自然科学基金(10275099,10175096,10347124)，暨南大学自然科学基金(640567)资助~~ |
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| 摘 要： | 在Walecka模型的平均场近似下,研究了由质子、中子和电子组成的中子星物质在均匀强磁场中的性质,发现磁场增强,物态方程会在一定程度上变硬,中子所占比例显著增加,质子和电子所占比例会显著减少,磁场对物态方程的影响比它对粒子组分的影响小.本文还分别利用流体力学公式和热力学公式分别计算了中子星物质的压强,发现磁场越强,用这两种方式计算的压强越接近,当磁场为1014T时,它们完全重合.
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| 关 键 词： | 均匀强磁场 中子星物质 物态方程 平均场近似 |
| 收稿时间： | 2004-6-14 |
Equation of State of Neutron Star Matter in Uniform Strong Magnetic Fields |
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| CHEN Wei, LIU Liang-Gang.Equation of State of Neutron Star Matter in Uniform Strong Magnetic Fields[J].High Energy Physics and Nuclear Physics,2005,29(2):119-123. |
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| Authors: | CHEN Wei LIU Liang-Gang |
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| Institution: | CHEN Wei~1,1) LIU Liang-Gang2 1 |
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| Abstract: | The Walecka model is extended to the neutron star matter, and in it's mean field approximation, the properties of neutron star matter consisted of proton, neutron and electron in uniform strong magnetic fields are studied. It is found that the ~equation of state (EOS) becomes stiffer in some degree, and the ratio of neutron increase evidently while the one of proton and electron decrease with the magnetic field being stronger. The influence of the magnetic to the EOS is smaller than the one to the fractions of the particles. The pressure of the neutron star matter is calculated by hydrodynamics and thermodynamics respectively. The stronger the magnetic field is, The more adjacent the curves of pressure depicted in these two ways are, and they are in superposition completely when the magnetic field is 10~14 T. |
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| Keywords: | uniform strong magnetic field neutron star matter equation of state mean field approximation |
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