Quasar quartet embedded in giant nebula reveals rare massive structure in distant universe
Science2015Vol. 348(6236), pp. 779–783
Citations Over TimeTop 1% of 2015 papers
Abstract
In a cluster of protogalaxies far, far away Astronomers constantly scour the sky for astronomical objects that can provide insight and constrain their models and simulations of galaxy evolution. Hennawi et al. surveyed the ancient sky at an epoch when the universe was half its age for nebulae: large clouds of ionized hydrogen. They stumbled across a system containing four active galactic nuclei, or quasars; objects that are thought to be the progenitors of galaxies. Finding a nebula with a rare quadruple quasar system embedded within it allows detailed spectroscopic and motional studies that may help to refine current models of galaxy and galaxy cluster formation. Science , this issue p. 779
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