{"paper":{"title":"Explaining changing-look AGN with state transition triggered by rapid mass accretion rate drop","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Chris Done, Hirofumi Noda","submitted_at":"2018-05-21T02:35:07Z","abstract_excerpt":"We model the broadband (optical/UV and X-ray) continuum spectrum of the \"changing-look\" active galactic nucleus (AGN) Mrk 1018 as it fades from Seyfert 1 to 1.9 in $\\sim 8$ years. The brightest spectrum, with Eddington ratio $L/L_{\\rm Edd}\\sim 0.08$, has a typical type 1 AGN continuum, with a strong \"soft X-ray excess\" spanning between the UV and soft X-rays. The dimmest spectrum, at $L/L_{\\rm Edd} \\sim 0.006$, is very different in shape as well as luminosity, with the soft excess dropping by much more than the hard X-rays. The soft X-ray excess produces most of the ionizing photons, so its dr"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1805.07873","kind":"arxiv","version":2},"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"}