Dry Mergers and the Size Evolution of Early-type Galaxies

被引：0
|
作者：
Nipoti, C. [1 ]
机构：
[1] Univ Bologna, Dipartimento Astron, I-40127 Bologna, Italy
来源：
ADVANCES IN COMPUTATIONAL ASTROPHYSICS: METHODS, TOOLS AND OUTCOMES | 2012年 / 453卷
关键词：
ELLIPTIC GALAXIES; ASSEMBLY HISTORIES; FUNDAMENTAL PLANE; SIMULATIONS; CONSTRAINTS; COMPACT;
D O I：
暂无
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Dry (i.e. dissipationless) merging has been proposed as the main driver of the observed size evolution of early-type galaxies (ETGs). The actual role of this mechanism is questioned by the tightness of the local stellar mass-size relation of ETGs. Combining this observed scaling law with simple merging models, which should bracket cosmologically motivated merging histories, we draw the following conclusions: 1) local massive ETGs can have assembled at most similar to 45% of their stellar mass via dry mergers; 2) extreme fine tuning is required for this to be the case.
引用
收藏
页码：233 / 236
页数：4
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