{"paper":{"title":"Overmassive black holes in the $M_{\\rm BH} - \\sigma$ diagram do not belong to over (dry) merged galaxies","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Alister W. Graham, Giulia A. D. Savorgnan","submitted_at":"2014-10-27T20:00:47Z","abstract_excerpt":"Semi-analytical models in a $\\Lambda$CDM cosmology have predicted the presence of outlying, \"overmassive\" black holes at the high-mass end of the (black hole mass -- galaxy velocity dispersion) $M_{\\rm BH} - \\sigma$ diagram (which we update here with a sample of 89 galaxies). They are a consequence of having experienced more dry mergers -- thought not to increase a galaxy's velocity dispersion -- than the \"main-sequence\" population. Wet mergers and gas-rich processes, on the other hand, preserve the main correlation. Due to the scouring action of binary supermassive black holes, the extent of "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1410.7405","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"}