详尽大质量双星演化的演化星族合成模型和星系演化链

大质量恒星是星系演化中最重要的恒星类型之一。观测发现大质量恒星多属于双星系统(2/3～1), 模型预言某些双星在演化中产生的元素、能量和动量等完全不同于单星。Sana曾预言星团中～75%的双星会发生并合、吸积加速或包层剥离等，这将影响星系演化中的一些物理过程和一些星系的演化。..然而迄今没有囊括各种类型的、利用详尽结果的自洽双星演化库，双星演化结果要么是单一类型的详尽的，要么是所有类型的分析的，直接拼接利用各类双星的详尽演化结果会不自洽。另外没有据此的、符合观测双星比例和分布的演化星族合成EPS模型和双星对星系物理过程影响的研究。双星演化理论已经得到了充足发展，将其应用到星系研究领域的时机已成熟。本项目研究内容是建立一个含各种类型的、利用详尽结果的自洽双星演化库、据此构建符合观测双星比例和分布的EPS模型、研究星系演化中的气体冷却和反馈等物理过程，小质量、低红移富金属和短时标等星系的演化。

Massive stars are the most important objects in galaxy evolution. Observations found that most of massive stars are in binary systems (2/3~1), and theory predicts that binary evolution can produce different amounts of elements, ejected energy and momentum as expected from single star evolution. Sana (2012) has predicted that ~75 per cent of binaries in clusters would experience merge, accretion & spin up or common envelope and envelope-stripping processes, this would affect some physical processes during galaxy evolution and the evolutions of some galaxy types...So far, there is not a self-consistent binary evolution library, which includes all kinds of binary systems and uses the detailed binary evolutionary results. The binary evolutionary results are detailed for a given type or analytic for all binary types, the direct combination of some detailed binary evolutionary results would lead to non-self-consistency. Moreover, there are not the evolutionary population synthesis (EPS) and galaxy models based on the above binary evolution library and observed binary fraction and distributions. Binary theory has made great processes during the past decades, and the time is ripe for applying them to the galaxy field. This project is to build a self-consistent binary evolution library, which includes all kinds of binaries and uses detailed binary evolutionary results, to construct EPS models based on the above results and observed binary fraction and distributions, and to study the physical processes (gas-cooling, feedback, etc.) during the galaxy evolution and the evolutions for some galaxy types (low-mass, low-redshift metal-rich, short-timescale, etc.).