拱星OH脉泽辐射频谱的双峰结构和多重分离的膨胀拱星壳  

DOUBLE-PEAKED SPECTRAL PROFILES OF CIRCUMSTELLAR OH MASER EMISSION AND MULTIPLE DISTINCY AND EXPANDING CIRCUMSTELLAR SHELLS

作　　者：俞志尧[1] 

机构地区：[1]中国科学院上海天文台,上海200030

出　　处：《天文学报》1998年第3期237-243,共7页Acta Astronomica Sinica

基　　金：国家自然科学基金;中国科学院天文委员会和射电天文联合实验室资助

摘　　要：对一些OH／IR星的拱星OH脉泽的观测结果表明，在双峰结构谱线轮廓上常常可以发现一些小峰叠加在双峰上，即在谱线轮廓的双峰结构中的每个峰是由几个小峰叠加而成的．从脉泽的辐射转移方程和拱星包层的速度结构出发，研究拱星OH脉泽辐射频谱的轮廓特征，提出多重分离的膨胀拱星亮模型，很好地解释了双峰结构的奇特观测现象．The results of measurements of some circumstellar OH masers of OH / IR stars indicate that several small peaks are located on the double peaks. This implies that each peak of the double-peaked spectral profile is superposed by several small peaks.Using the equation of radiative transfer and the velocity field in the circumstellar envelope, the author has studied the double-peaked spectral profile and has proposed a new model, i.e. a multiple distinct and expading circumstellar shell. Finally, he has interpreted some strange observahonal phenomena with mis model.

关 键 词：拱星 OH脉泽辐射 双峰结构 膨胀 拱星壳 

分 类 号：P151[天文地球—天文学] P155.22