Discovery of an Ancient Celestial City Undergoing Rapid Growth: A Young Protocluster of Active Star-Forming Galaxies
A team of astronomers has discovered an ancient protocluster of galaxies in the midst of a vigorous process of formation. It is the densest and most active protocluster ever identified at so great a distance from Earth. The rapid construction of this young protocluster helps us to understand the early growth of clusters and the effects of a dense environment on the formation and evolution of galaxies.
These results are published in the September 20, 2012 edition of the Astrophysical Journal (Hayashi et al., 2012, ApJ, 757, 15).