Acta Scientiarum Naturalium Universitatis Pekinensis

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Thermal Characters of Molecular Clouds and Evolutionary States of Young Stars in the Taurus and Ophiuchus

WU Jingwen, WU Yuefang   

  1. Department of Geophysics, Peking University, Academy of Sciences of China-Peking University joint Beijing Astrophysics Center, Beijing, 100871
  • Received:1998-09-28 Online:1999-09-20 Published:1999-09-20



  1. 北京大学地球物理学系,中国科学院-北京大学联合北京天体物理中心,北京, 100871

Abstract: Gas kinetic temperature Tk and dust temperature Td were obtained for the clouds in Ophiuchus and Taurus based on CO observation as well as IRAS data. The requested Td>Tk for dust collision heating mechanism has been tested. The relationship between Td, Tbol and evolutionary states has been analyzed. Results show that young stars in Ophiuchus core are younger than in those of Taurus, and IRAS colour temperature can be used to estimate the evolutionary states of young stars as a whole.

Key words: interstellar molecular, infrared radiation, dynamics of interstellar molecular

摘要: 运用CO分子谱线及红外天文卫星资料,求出了金牛座、蛇夫座核心2个恒星形成区的气体运动温度Tk和尘埃温度Td,验证了尘埃加热分子云的基本条件;着重探讨了用Td参量比较年轻星体演化状态的方法,得出蛇夫座核心区恒星比金牛座恒星年轻的初步结论。

关键词: 星际分子, 红外辐射, 星际介质动力学

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