| 磁中子星的一维吸积柱模型 |
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| 引用本文： | 吴皓,徐海光,尤峻汉,林宣滨.磁中子星的一维吸积柱模型[J].中国天文和天体物理学报,1999(3). |
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| 作者姓名： | 吴皓 徐海光 尤峻汉 林宣滨 |
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| 作者单位： | 上海交通大学应用物理系!上海２０００３０(吴皓，徐海光，尤峻汉)，中国科学技术大学天体物理中心!合肥２３００２６(林宣滨) |
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| 摘 要： | 本文给出了改进的一维吸积柱模型，探讨了在大吸积率下吸积柱的结构及物理性质，并理论推导吸积柱内下落物质的温度、密度及速度的变化．计算结果表明，它自上而下可以分为几个部分：冲击区（辐射压减速区）、理想气体压减速区、简并气体压减速区、外流区．作为例证，详细计算了吸积率Ｍ≈１０~１７ｇ／ｓ，极区磁场强度Ｂｍ≈１０~８Ｔ的中子星吸积柱．探讨了吸积柱内的热核反应，认为它可能与低质量Ｘ射线双星的低频ＱＰＯ（准周期振荡）现象有关．
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| 关 键 词： | 中子星 吸积 热核反应 |
One-Dimensional Accretion Column Model ofa Magnetized Neutron Star |
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| WU Hao, XU Hai-guang, YOU Jun-hau.One-Dimensional Accretion Column Model ofa Magnetized Neutron Star[J].Chinese Journal of Astronomy and Astrophysics,1999(3). |
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| Authors: | WU Hao XU Hai-guang YOU Jun-hau |
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| Institution: | WU Hao, XU Hai-guang, YOU Jun-hau1 |
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| Abstract: | he infalling movement of the matter accreted onto a magnetized neutron star is discussed. A one-dimensional accretion column model is presented to describe the variationsof the infalling velocity, density and temperature of the infalling plasma. The column canbe divided from top down into four zones, impact, deceleration of ideal gas, decelerationo f degenerate gas and outflow. As an example, the accretion column for an accretion rateof 10~17g/s and a polar magnetic field of108 T was calculated. We discuss thermonuclear reaction inside the column, and consider that it may be related to the quasi-periodicoscillation (QPO) of the X-ray flux in low-mass close binaries. |
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| Keywords: | neutron star-accretion-thermonuclear reaction |
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