콜로퀴움
처녀자리 은하단내 은하간 구성성단의 거대구조 발견 (Detection of a Large Scale Structure of Intracluster Globular Clusters in the Virgo Cluster ) 2010-03-24
- Speaker : 박 홍수 박사 [Dr. Hong Soo Park] (KASI)
- Date : 2010-03-24 01:00 ~ 01:00
- Location :
본 연구는 수천 개의 은하를 포함하고 있는 처녀자리 은하단에서, 은하와 은하 사이를 방랑하는 구상성단으로 이루어진 거대구조를 발견한 내용을 소개한다. 처녀자리 은하단 에서 은하간 구상성단은 어떤 분포를 보이는 지를 보여주며, 이러한 발견이 갖는 의의와 함축하는 내용을 언급한다.
Globular clusters are found usually in galaxies and they are an excellent tracer of dark matter. Long ago it was suggested that there may exist intracluster globular clusters (IGCs) bound to a galaxy cluster rather than to any single galaxy. Here we present a map showing the large scale distribution of globular clusters over the entire Virgo cluster. It shows that IGCs are found out to 1.5 Mpc from the Virgo center, and that they are concentrated in several substructures much larger than galaxies. These objects might have been mostly stripped off from low-mass dwarf galaxies.
Globular clusters are found usually in galaxies and they are an excellent tracer of dark matter. Long ago it was suggested that there may exist intracluster globular clusters (IGCs) bound to a galaxy cluster rather than to any single galaxy. Here we present a map showing the large scale distribution of globular clusters over the entire Virgo cluster. It shows that IGCs are found out to 1.5 Mpc from the Virgo center, and that they are concentrated in several substructures much larger than galaxies. These objects might have been mostly stripped off from low-mass dwarf galaxies.