S140电离氢区─分子云复合体的红外发射研究

Infrared Sandy of the H Ⅱ Region molecular Cloud Complex S140

本文使用ＩＲＡＳ巡天数据的最新版本ＩＲＡＳ巡天图（ＩＳＳＡ—ｃｏａｄｄｅｄ），经过进一步处理，得到了Ｓ１４０分子云复合体红外发射的强度、温度及尘埃的分布图。分析结果表明，分子云复合体（在３５角秒范围内）的红外发射总光度为２．９×１０４Ｌ⊙，Ｓ１４０区在各波段的分布里各向同性，红外连续发射在１２μｍ和１００μｍ有着较大的延伸，热而小的尘埃微粒的平均色温是１８４Ｋ，冷而大的尘埃平均色温为２９Ｋ。另外，在Ｓ１４０电离氢区—分子云复合体的核心部分（尤其是西部边缘和东部红外点源星团附近区域）有大量恒星正处于形成之中。

The infrared emission behavior of H Ⅱ region-molecular cloud complex S141 is examined through the IRAS Sky Survey Atlases. The IRAF and Skyview are used to analyze and thus the contours of the infrared intensity, color temperature and optical depth of S141 are presented. The results show that the total infrared luminosity within the～15pc region is 1.71×103L⊙. The mean dust temperature is 178.5K for the hot small grains and 26.8K for the colder larger grains. There are three major infrared emission areas presented in the molecular complex, another weaker one locates at the nouth-east of the molecular cloud. It is found that the possible exciting star of S141 may be the optical counterpart of the infrared point source 22268+6122, and the lower mass star formation may be taking place in S141.