Virgo Cluster Survey
Source:News Date:2015/07/05

   

Research assistant Chengze Liu obtained the first and the largest complete sample of ultra compact dwarf galaxy (UCD) in the Vigro cluster through multiband image data of Next generation Virgo Cluster Survey(NGVS),and derived the first spatial distribution of UCD in Virgo cluster.Further study shows that there is a strong connection between distribution of UCD ,hot gas and dark matter distribution in the cluster.These results have been published on ApJ,ApJS and other Journals in 2014.

Figure: By employing the line of sight velocities of 922 globular cluster ,the total mass within 180kpc near the center of Vigro cluster is M(<180kpc)=(1.5+/-0.2)times 10 ^{13}M_{star}.