揭开宇宙中最大星系的形成路线
Unveiling the formation route of the largest galaxies in the universe
摘要：
观测证据表明，在星系团中心最明亮的球状体的形成中，气体的作用仅次于重力，正如最初在80年代末/90年代初所描述的那样。然而，试图解释起源的基本面（FP）的大规模早期型星系（ETG）-一个倾斜版本的标度关系连接的大小，速度色散和质量的维里化同源系统-基于序列的成对合并，有系统地得出结论，耗散不能忽略。我们使用控制模拟的prerialization阶段的星系群，以表明多个无碰撞合并是能够创造现实的第一排名的星系。我们的模拟残留物定义了一个薄FP，它完美地拟合了本地体积中各种巨型ETG的数据，表明这些系统存在统一的关系。高等级星系在FP中占据的区域与标准天体不同，这种分离本质上被视为该平面标准投影所产生的2D相关性中的零点偏移。我们的研究结果使一个强有力的情况下，考虑层次耗散合并的可行路线形成的最大的星系在宇宙中。
英文摘要：
Observational evidence indicates that the role of gas is secondary to that of gravity in the formation of the most luminous spheroids inhabiting the centres of galaxy associations, as originally conjectured in the late 80's/early 90's. However, attempts to explain the origin of the Fundamental Plane (FP) of massive early-type galaxies (ETGs) -- a tilted version of the scaling relation connecting the size, velocity dispersion and mass of virialized homologous systems -- based on sequences of pairwise mergers, have systematically concluded that dissipation cannot be ignored. We use controlled simulations of the previrialization stage of galaxy groups to show that multiple collisionless merging is capable of creating realistic first-ranked galaxies. Our mock remnants define a thin FP that perfectly fits data from all kinds of giant ETGs in the local volume, showing the existence of a unified relationship for these systems. High-ranked galaxies occupy in the FP different areas than standard objects, a segregation which is viewed essentially as zero-point offsets in the 2D correlations arising from standard projections of this plane. Our findings make a strong case for considering hierarchical dissipationless merging a viable route for the formation of the largest galaxies in the universe.
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。
