WR双星情况A演化的研究  

Discussion for Evolution of Case A of WR Binary Stars

作　　者：冯文波[1] 

机构地区：[1]中南民族学院物理系

出　　处：《中南民族学院学报（自然科学版）》1999年第2期8-13,共6页Journal of South-Central University for Nationalities(Natural Sciences)

摘　　要：在较严格地考虑了辐射、潮汐、自转以及角动量损失的基础上，对ＷＲ双星情况Ａ的演化进行了深入的讨论．通过计算，可以看出，由于潮汐、自转作用对情况Ａ的演化影响较大，所以主星在进入赫罗图中ＷＲ区域时暴露出了较晚期的核反应状态，其表面氢丰度比相应的情况Ｂ演化要低，Ｃ／Ｏ比则比相应的情况Ｂ演化高．这说明，虽然５０个太阳质量是人们通常认为的产生ＷＮＥ和ＷＣ的主星初始质量下限，但是只要选定足够小的初始周期，不到５０个太阳质量的主星同样能够产生ＷＮＥ和ＷＣ。The evolution of WR binary from case has been discussed considering it's radiation ,tide,rotation and loss of angular momentum.It is concluded that a primary star less than 50M ⊙ can also form WNE and WC just when it have a short enough initial period,although 50M ⊙ is usually considered as lower limit to form WNE and WC. So,the article provide another potential channel to form WR binary stars.

关 键 词：WR双星 表面化学丰度 有效温度 演化 

分 类 号：P153[天文地球—天文学] P148