标题： 星系合并引起的转变 显示英文标题

标题： Galaxy Transformation by Merging

摘要： 理论考虑和观测数据支持过去合并事件更频繁的观点。 在高红移处，剧烈的相互作用和合并可能与Lyman-break星系、亚毫米波星爆以及活动星系核的起源有关。 星系团椭圆星系中的大多数恒星可能形成于红移z > 2时，银河系的晕和球状星团的大部分也在此时形成；这些事件可能都与合并有关。 但高红移时是什么样的星系发生了合并，这些早期事件与当前时期的合并有何联系？ 我将通过描述银河系、椭圆星系以及球状星团群体的形成观点来探讨这些问题。 显示英文摘要

摘要： Theoretical considerations and observational data support the idea that mergers were more frequent in the past. At high redshifts, violent interactions and mergers may be implicated in the origin of Lyman-break galaxies, sub-mm starbursts, and active galactic nuclei. Most stars in cluster ellipticals probably formed at redshifts z > 2, as did most of the halo and globular clusters of the Milky Way; these events may all be connected with mergers. But what kind of galaxies merged at high redshifts, and how are these early events connected to present-epoch mergers? I will approach these questions by describing ideas for the formation of the Milky Way, elliptical galaxies, and populations of globular clusters.