{"paper":{"title":"Enhancement of AGN in a protocluster at z=1.6","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Charutha Krishnan, Chris Simpson, Dale Kocevski, David T. Maltby, Elizabeth A. Cooke, Guenther Hasinger, Nina A. Hatch, Omar Almaini, Stuart I. Muldrew, William G. Hartley","submitted_at":"2017-05-30T18:00:31Z","abstract_excerpt":"We investigate the prevalence of AGN in the high-redshift protocluster $\\rm{Cl}\\,0218.3$-$0510$ at $z=1.62$. Using imaging from the Chandra X-ray Telescope, we find a large overdensity of AGN in the protocluster; a factor of $23\\pm9$ times the field density of AGN. Only half of this AGN overdensity is due to the overdensity of massive galaxies in the protocluster (a factor of $11\\pm2$), as we find that $17^{+6}_{-5}\\%$ of massive galaxies ($M_* > 10^{10}\\,\\rm{M}_{\\odot}$) in the protocluster host an X-ray luminous AGN, compared to $8\\pm1\\%$ in the field. This corresponds to an enhancement of A"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1705.10799","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}