星际甲醇分子脉泽的辐射抽运研究

A STUDY OF THE RADIATIVE PUMPING OF INTERSTELLAR METHANOL MASERS

本项研究给出了17个具有Ⅱ类星际甲醇分子脉泽源的致密氢11区的轫致辐射、尘埃红外辐射和中心年轻恒星Layman辐射的特征．以脉泽的光子发射率和辐射亮温度作为两个主要的辐射抽运约束条件，讨论了Ⅱ类星际甲醇分子脉泽的几种可能的激发机制．我们认为热辐射亮温度为100K与致密氢Ⅱ区成协的红外辐射体很可能是Ⅱ类甲醇脉泽的抽运源．

17 sources with the Oass II interstellar methanol masers, their continua of compact H II regions as well as the associated infrared and Lyman radiations from newly forming stars are presented in this paper. We have examined the possibleexcitation mechanism for the methanol masers. The results show that the infrared oh jects with brightness temperature of 100 K and photon rate of about 1053s-1associated with compact H II regions are reasonably excitation sources for the Class II interstellar methanol masers.