{"paper":{"title":"Supermassive black holes at high redshifts","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Alberto Dominguez, Alessandro de Angelis, Alexandre Marcowith, Daniel Castro, Dario Gasparrini, David Thompson, Dieter Hartmann, Elena Orlando, Elisa Prandini, Elizabeth Hays, Filippo D'Ammando, Francesco Longo, Hui Li, Ivan Agudo, Jeremy S. Perkins, John Tomsick, John W. Hewitt, J. Patrick Harding, Julie McEnery, Lea Marcotulli, Lih-Sin The, Marco Ajello, Maria Petropoulou, Matthew Baring, Michele Doro, Paolo Coppi, Roopesh Ojha, Sara Buson, Sylvain Guiriec, Tonia Venters, Vaidehi S. Paliya, Vladimir Bozhilov, Volker Beckmann, Zorawar Wadiasingh","submitted_at":"2019-03-14T16:36:24Z","abstract_excerpt":"MeV blazars are the most luminous persistent sources in the Universe and emit most of their energy in the MeV band. These objects display very large jet powers and accretion luminosities and are known to host black holes with a mass often exceeding $10^9 M_{\\odot}$. An MeV survey, performed by a new generation MeV telescope which will bridge the entire energy and sensitivity gap between the current generation of hard X-ray and gamma-ray instruments, will detect $>$1000 MeV blazars up to a redshift of $z=5-6$. Here we show that this would allow us: 1) to probe the formation and growth mechanism"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1903.06106","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"}