小质量比深度相接双星的统计分析

发布时间：2018-04-01 11:38

本文选题：过相接双星　切入点：最小质量比　出处：《科学通报》2010年34期

【摘要】：基于30颗小质量比深度相接双星的观测数据,获得一些重要的统计结论:(ⅰ)质光关系和质径关系指出,此类双星可能由于演化和膨胀而使光度下降、半径变大,预示它们可能处在演化的最后阶段.(ⅱ)Mtotal-Jtotal关系表明,随着总质量的减小,总的比角动量也相应减小.因此,此类双星系统从深度相接到并合的过程中,不断损失质量和角动量.(ⅲ)由q-f关系和q-Jspin/Jorb关系,确定出过相接双星的最小质量比可能在0.0439~0.0465.这对双星演化并合理论提出了重要的挑战.目前观测到的最小质量比双星V857Her通过次子星到主子星的守恒质量转移的并合时标约为1.07Ga.
[Abstract]:30 tiny mass ratio depth observation data based on binary phase, obtained some important statistical conclusions: (I) pointed out that the mass luminosity relation and mass radius relations, such binaries can make luminosity decline due to evolution and expansion, the radius becomes larger, indicating that they may be in the final stages of evolution. (II) Mtotal-Jtotal show that the relationship between the with the decrease of the total mass of the total angular momentum decreases correspondingly. Therefore, this kind of binary system connected to and from the depth in the process of continuous loss of mass and angular momentum. (III) by q-f and q-Jspin/Jorb relations, determined overcontact binary minimum quality than possible in the binary evolution and 0.0439~0.0465. the theory put forward an important challenge. The minimum quality currently observed than binary V857Her through the second star to the primary star of conservation of mass transfer and time scale of about 1.07Ga.

【作者单位】：淮北师范大学物理与电子信息学院;
【基金】：国家自然科学基金天文联合基金资助项目(10778707)
【分类号】：P153

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