{"paper":{"title":"Rapid Black Hole Growth at the Dawn of the Universe: A Super-Eddington Quasar at z=6.6","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Chia-Ying Chiang, Chichuan Jin, Chris Done, Ece Kilerci Eser, Ji-Jia Tang, Seong Jin Kim, Tetsuya Hashimoto, Ting-Yi Lu, Tomotsugu Goto, Youichi Ohyama","submitted_at":"2019-01-09T06:30:46Z","abstract_excerpt":"We present the analysis of a new near-infrared (NIR) spectrum of a recently discovered $z=6.621$ quasar PSO J006+39 in an attempt to explore the early growth of supermassive black holes (SMBHs). This NIR (rest-frame ultraviolet, UV) spectrum shows blue continuum slope and rich metal emission lines in addition to Ly$\\alpha$ line. We utilize the MgII line width and the rest frame luminosity $L_\\text{3000\\AA}$ to find the mass of SMBH ($M_\\text{BH}$) to be $\\sim 10^8 M_\\odot$, making this one of the lowest mass quasars at high redshift. The power-law slope index ($\\alpha_\\lambda$) of the continuu"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.02615","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"}