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金牛座、蛇夫座中分子云的热性质和年轻星体的演化状态

Thermal Characters of Molecular Clouds and Evolutionary States of Young Stars in the Taurus and Ophiuchus
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摘要 运用 C O 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。 Gas kinetic temperature T k and dust temperature T \-d were obtained for the clouds in Ophiuchus and Taurus based on CO observation as well as IRAS data . The requested T \-d> T k for dust collision heating mechanism has been tested. The relationship between T \-d\, T bol and evolutionary stat es has been analyzed. Results show that young stars in Ophiuchus core are younge r than in those of Taurus, and IRAS colour temperature can be used to estimate t he evolutionary states of young stars as a whole.
出处 《北京大学学报(自然科学版)》 CAS CSCD 北大核心 1999年第5期665-671,共7页 Acta Scientiarum Naturalium Universitatis Pekinensis
基金 国家自然科学基金 中科院射电天文联合实验室资助项目
关键词 星际分子 分子云 金牛座 热性质 蛇夫座 星体 interstellar molecular infrared radiation dynamics of interstellar molecular
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  • 1斯必泽L 蔡贤德译.星际介质物理学[M].北京:科学出版社,1988..
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