转动恒星引力昏暗效应及演化研究

发布时间：2018-07-03 21:33

本文选题：恒星结构与演化 + 转动　；参考：《山东大学学报(理学版)》2016年05期

【摘要】：转动和潮汐效应是影响恒星结构和演化非常重要的物理因素。根据Achernar的观测数据,用考虑转动和潮汐效应的单、双星模型,研究了Achernar引力昏暗现象。发现转动双星模型比单星模型更能符合Achernar的赤道和极半径之比观测值。计算结果表明,初始转动角速度快的恒星,其等价半径和中心密度在主序阶段的开始至40 M yr较大,随后变小。同时,由于初始转动角速度大的恒星,星风携带自转角动量损失多,造成后期演化角速度变小。另外,转动效应能增加恒星的中心集中度,但减少恒星的四极矩、回旋半径、中心温度、氢燃烧产能率,使转动恒星向赫罗图的低温和低光度演化。
[Abstract]:Rotation and tidal effects are very important physical factors that affect the structure and evolution of a star. According to the observation data of Achernar, a single, double star model, which considers the rotation and tidal effects, is used to study the Achernar gravitational dark phenomenon. It is found that the ratio of the equator and polar radius to Achernar more than that of a single star model is calculated. The results show that the equivalent radius and the center density of the star with high initial rotation angle are larger at the beginning of the main sequence stage to 40 M yr, and then smaller. At the same time, due to the star with large initial rotational angular velocity, the star wind carries the self turning momentum loss much, which causes the later evolution angular velocity to be smaller. In addition, the rotation effect can increase the central concentration of the star. However, the star's quadrupole moment, radius of gyration, central temperature and hydrogen production rate will reduce the rotational stars to the low and low luminosity of heroto.
【作者单位】：贵州大学理学院物理系;中国科学院天体结构与演化重点实验室;中科院国家天文台-贵州大学天文联合研究中心;
【基金】：国家自然科学基金资助项目(11463002) 中科院天体结构与演化重点实验室开放课题资助项目(OP201405) 贵州大学自然科学青年基金资助项目(贵大自青基合字(2013)06号);贵州大学研究生创新基金资助项目(研理工2015055)
【分类号】：P152

【参考文献】