晚型富氧星在双色图上的分布和可能的演化途径

THE DISTRIBUTION AND POSSIBLE EVOLUTION TRACES OF LATETYPE O-RICH STARS IN THE IR COLOUR-COLOUR DIAGRAM

本文利用IRAS的天文观测数据,对含有9.7μm硅酸盐特征的1442个点源,利用能谱分布(双色图)的方法得出了一些统计规律,提出了计算晚型富氧星演化规律的模型,揭示了这类恒星过去在主序上的质量大小,以及(2—8)M_θ的恒星各自在双色图上的演化规律和Miras星及OH/IR星的物理特征。

We used IRAS data and got 1442 point source stars with 9.7μm feature of sinicate. Some peculiar statistical results have been obtained. Then we have proposed the model calculation of late-type O-rich red giant star evolution. Shows the mass size of this kind of stars in the main-star sequence in past. The individual evolution laws of (2—8)M_θ stars and some physical properties of Miras stars and OH/IR stars have been acquired.