| Mira星包层中的OH脉泽模型 |
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| 引用本文： | 施建荣,李守中,孙锦.Mira星包层中的OH脉泽模型[J].中国天文和天体物理学报,1999(1). |
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| 作者姓名： | 施建荣 李守中 孙锦 |
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| 作者单位： | 上海交通大学应用物理系，中国科学院北京天文台，北京大学地球物理系，北京师范大学天文系 |
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| 摘 要： | 采用拱星包层物质轴对称分布的模型，计算了Ｍｉｒａ星拱星包层的物质分布和速度场分布，并通过解统计平衡方程得到了ＯＨ１８ｃｍ的四条谱线的反转区．模型假定辐射压来自中心星和尘埃本身的辐射．计算中考虑了中心星的辐射、ＯＨ分子与电子的碰撞、尘埃本身的辐射和微波背景辐射等抽运机制，计算结果基本上反映了观测到的ＯＨ脉泽的径向分布和角向分布等性质．
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| 关 键 词： | Mira星，拱星包层，OH脉泽 |
Model of OH Maser in the Circumstellar Envelope ofMira Stars |
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| SHI Jian-rong, Li Shou-zhong SUN Jin.Model of OH Maser in the Circumstellar Envelope ofMira Stars[J].Chinese Journal of Astronomy and Astrophysics,1999(1). |
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| Authors: | SHI Jian-rong Li Shou-zhong SUN Jin |
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| Institution: | SHI Jian-rong1,2 Li Shou-zhong3 SUN Jin41 |
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| Abstract: | In this paper,we calculate the mass and velocity distribution of the envelope of Mirastars,for an axisymmetric distribution of the envelope mass.We also calculate the inversionregions of the four 18 cm lines of OH.We assume that the radiation pressure comes from thecentral star and the thermal emission of the dust itself.We consider pumping mechanismsdue to emission from the central star,collision,emission from the dust itself and cosmicmicrowave background.The model reproduces some of the general features seen in the realsources. |
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| Keywords: | mira stars-envelope-OH maser |
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