Ongoing Assembly of Massive Galaxies by Major Merging in Large Groups and Clusters from the SDSS

Daniel H. McIntosh, Yicheng Guo, Jen Hertzberg +4

We investigate the incidence of major mergers creating >10e11 Msun galaxies in present-day groups and clusters more massive than 2.5e13 Msun. We identify 38 pairs of massive galaxi…