A Luminous Quasar at Redshift 7.642

  title={A Luminous Quasar at Redshift 7.642},
  author={Feige Wang and Jinyi Yang and Xiaohui Fan and Joseph F. Hennawi and Aaron J. Barth and Eduardo Ba{\~n}ados and Fuyan Bian and Konstantina Boutsia and Thomas Connor and Frederick B. Davies and Roberto Decarli and Anna-Christina Eilers and Emanuele Paolo Farina and Richard F. Green and Linhua Jiang and Jiangtao Li and Chiara Mazzucchelli and Riccardo Nanni and Jan-Torge Schindler and Bram P. Venemans and Fabian Walter and Xue-bing Wu and Minghao Yue},
  journal={The Astrophysical Journal Letters},
Distant quasars are unique tracers to study the formation of the earliest supermassive black holes (SMBHs) and the history of cosmic reionization. Despite extensive efforts, only two quasars have been found at z ≥ 7.5, due to a combination of their low spatial density and the high contamination rate in quasar selection. We report the discovery of a luminous quasar at z = 7.642, J0313−1806, the most distant quasar yet known. This quasar has a bolometric luminosity of 3.6 × 1013 L ⊙. Deep… 

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Discovery of the most distant luminous quasar to date: J0313-1806

  • Physics
  • 2022
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An 800-million-solar-mass black hole in a significantly neutral Universe at a redshift of 7.5

Strong evidence of absorption of the spectrum of the quasar redwards of the Lyman α emission line (the Gunn–Peterson damping wing), as would be expected if a significant amount of the hydrogen in the intergalactic medium surrounding J1342 + 0928 is neutral, and a significant fraction of neutral hydrogen is derived, although the exact fraction depends on the modelling.