{"paper":{"title":"Extremely Massive Quasars are not Good Proxies for Dense Environments Compared to Massive Galaxies: Environments of Extremely Massive Quasars and Galaxies","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Byeong-Gon Park, Hyunsung David Jun, Minhee Hyun, Minjin Kim, Myungshin Im, Narae Hwang, Yongmin Yoon","submitted_at":"2019-01-08T11:51:51Z","abstract_excerpt":"Black hole mass scaling relations suggest that extremely massive black holes (EMBHs) with $M_\\mathrm{BH}\\ge10^{9.4}\\,M_{\\odot}$ are found in the most massive galaxies with $M_\\mathrm{star}\\ge10^{11.6}\\,M_{\\odot}$, which are commonly found in dense environments, like galaxy clusters. Therefore, one can expect that there is a close connection between active EMBHs and dense environments. Here, we study the environments of 9461 galaxies and 2943 quasars at $0.24 \\le z \\le 0.40$, among which 52 are extremely massive quasars with $\\log(M_\\mathrm{BH}/M_{\\odot}) \\ge 9.4$, using Sloan Digital Sky Surve"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.02267","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"}