IRAS05391-0217和IRAS06572-0742源的热动性质  

THERMODYNAMIC PROPERTIES OF THE SOURCES IRAS05391 0217 AND IRAS06572 0742

作　　者：李月兴[1,2] 吴月芳[1,2] 

机构地区：[1]北京大学地球物理系 [2]中国科学院--北京大学联合北京天体物理中心

出　　处：《天文学报》1999年第1期44-50,共7页Acta Astronomica Sinica

基　　金：国家自然科学基金;中国科学院射电天文联合实验室资助项目

摘　　要：利用紫金山天文台青海观测站１３．７米射电望远镜对源ＩＲＡＳ０５３９１０２１７和ＩＲＡＳ０６５７２０７４２进行了１２ＣＯＪ＝１－０观测，获得了气体的相应参数；用ＩＲＡＳ及其他红外观测资料，获得了尘埃热结构；探讨了云中气体的热平衡．对于ＩＲＡＳ０５３９１０２１７中由远红外得出的Ｔｄ＜Ｔｋ的情形，考虑了几种可能的加热机制．光电加热对该云可能是比较重要的；激波可能是另一种加热途径．By analyzing the CO J=1-0 spectra of IRAS05391 0217 and IRAS06572 0742 obtained with the 13.7m radio telescope of Purple Mountain Observatory at Qinghai Station, we calculated their gas kinetic temperature distributions. With the IRAS and other infrared data, we fitted the dust thermal structures and investigated their thermal equilibria. In the case of T d<T k in IRAS05391 0217, we considered several possible heating mechanisms. Since there are bright brims in its northern and western parts, calculation shows that the photoelectric heating may be important. There is also high velocity gas in the cloud discussed, so the shock heating can be another possible mechanism.

关 键 词：星际分子 星际介质动力学 热动性质 射电望远镜 

分 类 号：P155.22[天文地球—天文学]