請用此 Handle URI 來引用此文件:
http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/46316
標題: | 利用弱重力透鏡效應探測星系團中的暗質次結構 Weak Lensing Mass Measurement of Dark Matter Subhalos in Clusters |
作者: | Li-Yen Hsu 徐立研 |
指導教授: | 陳丕燊(Pisin Chen) |
關鍵字: | 弱重力透鏡,暗質,星系團, weak gravitational lensing,galaxy-galaxy lensing,dark matter,subhalos,clusters, |
出版年 : | 2010 |
學位: | 碩士 |
摘要: | According to the cold dark matter (CDM) model, cosmic structures are formed hierarchically through a succession of mergers and accretions. Since more massive structures are merged from less massive structures, there should be some surviving dark matter substructures (subhalos) in cluster-sized dark matter halos. Numerous numerical simulations have shown that about (5-20)% of the total mass of a cluster is contributed by these subhalos. In addition, the size and mass of subhalos depend strongly on the cluster-centric radius due to the tidal force induced by the host halo. Therefore, the comparison between observation of subhalos properties and the simulation prediction is important, in order to gain a deeper understanding of the growth and evolution of the clusters. Here we present the technique of galaxy-galaxy lensing using both the N-body simulation and the observational data in order to explore substructures in cluster halos. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/46316 |
全文授權: | 有償授權 |
顯示於系所單位: | 物理學系 |
文件中的檔案:
檔案 | 大小 | 格式 | |
---|---|---|---|
ntu-99-1.pdf 目前未授權公開取用 | 1.63 MB | Adobe PDF |
系統中的文件,除了特別指名其著作權條款之外,均受到著作權保護,並且保留所有的權利。