题  目：Mass stream and Cusp relation

 
报告人：Dr Li Guoliang
 

单  位：Argelander Institute for Astronomy
　　　　Bonn University

 

Abstract: The statistic of cusp relation from observation provides a very
strong constraint on the abundance of substructure in lens while the previews research shows that the observation needs much more substructures than N-body simulation can provide. This has been a challenge to the structure formation theory in the CDM cosmology for a long time . In this talk, I'll show how the disrupted substructure, mass stream, can violate the cusp relation and this will provide a possible way to weaken that discrepancy between observation and theoretical
predication.

 

时  间：12月9日（星期三）上午11:00
 

地  点：鼓楼大楼3楼327教室

 

欢迎大家光临

 

　　　　　　　　　　　　　　　　　　　　　 紫金山天文台学术委员会学术交流工作委员会
　　　　　　　　　　　　　　　　　　　　　　　　　　　　  2009年12月7日