%0 Generic %1 hennawi2015quasar %A Hennawi, Joseph F. %A Prochaska, J. Xavier %A Cantalupo, Sebastiano %A Arrigoni-Battaia, Fabrizio %D 2015 %K cgm giant nebula quasars %R 10.1126/science.aaa5397 %T Quasar Quartet Embedded in Giant Nebula Reveals Rare Massive Structure in Distant Universe %U http://arxiv.org/abs/1505.03786 %X All galaxies once passed through a hyperluminous quasar phase powered by accretion onto a supermassive black hole. But because these episodes are brief, quasars are rare objects typically separated by cosmological distances. In a survey for Lyman-alpha emission at redshift z ~ 2, we discovered a physical association of four quasars embedded in a giant nebula. Located within a substantial overdensity of galaxies, this system is probably the progenitor of a massive galaxy cluster. The chance probability of finding a quadruple quasar is estimated to be ~10^-7, implying a physical connection between Lyman-alpha nebulae and the locations of rare protoclusters. Our findings imply that the most massive structures in the distant universe have a tremendous supply (~ 10^11 solar masses) of cool dense (volume density ~1 cm^-3) gas, which is in conflict with current cosmological simulations.

@misc{hennawi2015quasar, abstract = {All galaxies once passed through a hyperluminous quasar phase powered by accretion onto a supermassive black hole. But because these episodes are brief, quasars are rare objects typically separated by cosmological distances. In a survey for Lyman-alpha emission at redshift z ~ 2, we discovered a physical association of four quasars embedded in a giant nebula. Located within a substantial overdensity of galaxies, this system is probably the progenitor of a massive galaxy cluster. The chance probability of finding a quadruple quasar is estimated to be ~10^-7, implying a physical connection between Lyman-alpha nebulae and the locations of rare protoclusters. Our findings imply that the most massive structures in the distant universe have a tremendous supply (~ 10^11 solar masses) of cool dense (volume density ~1 cm^-3) gas, which is in conflict with current cosmological simulations.}, added-at = {2015-05-15T09:53:54.000+0200}, author = {Hennawi, Joseph F. and Prochaska, J. Xavier and Cantalupo, Sebastiano and Arrigoni-Battaia, Fabrizio}, biburl = {https://www.bibsonomy.org/bibtex/23a15acf11eabb1a5a9464e4d68d9c19e/miki}, description = {[1505.03786] Quasar Quartet Embedded in Giant Nebula Reveals Rare Massive Structure in Distant Universe}, doi = {10.1126/science.aaa5397}, interhash = {62a6f9b1198916bf27c73f856e936793}, intrahash = {3a15acf11eabb1a5a9464e4d68d9c19e}, keywords = {cgm giant nebula quasars}, note = {cite arxiv:1505.03786Comment: accepted for publication in Science. Main text: 11 pages, 4 figures; Supplementary Online Material: 52 pages, 10 figures, 6 tables}, timestamp = {2015-05-15T09:53:54.000+0200}, title = {Quasar Quartet Embedded in Giant Nebula Reveals Rare Massive Structure in Distant Universe}, url = {http://arxiv.org/abs/1505.03786}, year = 2015 }