arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0708.0949astro-ph
收藏

星系演化

The Evolution of Galaxies

Jan Palouš

摘要:

星系的演化是内部和外部过程共同作用的结果。恒星的形成是一个内部过程,将分子云的冷而致密的核心转化为恒星。它可能是由膨胀的外壳内部触发的,也可能是外部触发的。G.银河系碰撞。气体吸积和星系合并事件是星系演化的外部贡献者。它们与星系演化的另一个内部过程竞争,这是长期演化重新分配星系内部的质量和角动量,作为棒臂和旋臂形成的结果。作为附近的气体吸积的例子,我们提到相互作用系统银河系-大麦哲伦云和小麦哲伦云。作为星系与环境相互作用的另一个例子,对星系团中ISM的剥离进行了评述。

英文摘要:

The evolution of galaxies results from a combination of internal and external processes. The star formation is an internal process transforming cold and dense cores of molecular clouds to stars. It may be triggered internally by expanding shells, or externally, e. g. by galaxy collisions. The gas accretion and galaxy merging events are external contributors to galaxy evolution. They compete with another internal process of galaxy evolution, which is the secular evolution redistributing the mass and angular momentum inside of galaxies as a consequence of bar and spiral arms formation. As a nearby example of gas accretion we mention the interacting system Milky Way - Large and Small Magellanic Clouds. Stripping of ISM in galaxy clusters is reviewed as another example of interaction of galaxies with their environment.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑