Optical observations and model for Cygnus X-1
Optical observations and model for Cygnus X-1
复制标题
Cygnus X-1 的光学观测和模型
DOI：
10.1086/152163
复制
发表时间：
1973
期刊：
影响因子：
--
通讯作者：
G. Walker
中科院分区：
文献类型：
--
作者：
J. Hutchings;D. Crampton;J. Glaspey;G. Walker
Spectrophotometric observations have been made with an image isocon camera of thc lambda 4686 region of the spectrum of HDE 226868. After compensation for the underiying absorption spectum, the He II emission line is found to vary in velocity 120 deg out of phase with the absorption spectrum, with about twice the velocity amplitude. There is evidence for structure in the emission profile which changes with orbital phase. These results, and an analysis of the ellipsoidal light variations, suggest that the system is viewed at i approx equal 27 deg m with masses of approx equal 22 and 14 M sub solar . The spectral energy distribution seems to be normal for a reddened BO star. A weak unidentified emission line is detected at phase ~0.2 at ~ lambda 5230. (auth)
