{"paper":{"title":"Physical properties of 15 quasars at $z\\gtrsim 6.5$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"A.-C. Eilers, B. P. Venemans, C. Mazzucchelli, C. Waters, D. Stern, E. Ba\\~nados, E. Magnier, E. P. Farina, E. Schlafly, F. Walter, G. De Rosa, H.-W. Rix, J. Greiner, J. Hennawi, K. C. Chambers, N. Kaiser, N. Metcalfe, P. W. Draper, R. Decarli, R. J. Wainscoat, R.-P. Kudritzki, R. Simcoe, W. Burgett, X. Fan","submitted_at":"2017-10-03T16:16:51Z","abstract_excerpt":"Quasars are galaxies hosting accreting supermassive black holes; due to their brightness, they are unique probes of the early universe. To date, only few quasars have been reported at $z > 6.5$ ($<$800 Myr after the Big Bang). In this work, we present six additional $z \\gtrsim 6.5$ quasars discovered using the Pan-STARRS1 survey. We use a sample of 15 $z \\gtrsim 6.5$ quasars to perform a homogeneous and comprehensive analysis of this highest-redshift quasar population. We report four main results: (1) the majority of $z\\gtrsim$6.5 quasars show large blueshifts of the broad CIV 1549\\AA$\\,$emiss"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1710.01251","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"}