The Distances of Subclusters in the Virgo Area

By using the Mixture Model and radial velocity data from CfA redshift catalogue, we resolve the substructures of the Virgo cluster.Distances of three main subclusters are determined by the Tully-Fisher galaxies, they are 18.0±1.3Mpc, 25.0 ±2.3Mpc and 30.9±3.1Mpc respectively, which implicate that they are independent clusters, and the Virgo area has a significant depth in the line-of-sight direction.