Abstract: 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 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T_k和尘埃温度T_d，验证了尘埃加热分子云的基本条件；着重探讨了用T_d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