Pōniuā‘ena: A Luminous z = 7.5 Quasar Hosting a 1.5 Billion Solar Mass Black Hole

@article{Yang2020PniuenaAL,
  title={Pōniuā‘ena: A Luminous z = 7.5 Quasar Hosting a 1.5 Billion Solar Mass Black Hole},
  author={Jinyi Yang and Feige Wang and Xiaohui Fan and Joseph F. Hennawi and Frederick B. Davies and Minghao Yue and Eduardo Ba{\~n}ados and Xue-bing Wu and Bram P. Venemans and Aaron J. Barth and Fuyan Bian and Konstantina Boutsia and Roberto Decarli and Emanuele Paolo Farina and Richard Green and Linhua Jiang and Jiangtao Li and Chiara Mazzucchelli and Fabian Walter},
  journal={The Astrophysical Journal Letters},
  year={2020},
  volume={897}
}
We report the discovery of a luminous quasar, J1007+2115 at z = 7.515 (“Pōniuā‘ena”), from our wide-field reionization-era quasar survey. J1007+2115 is the second quasar now known at z > 7.5, deep into the reionization epoch. The quasar is powered by a (1.5 ± 0.2) × 109 M⊙ supermassive black hole (SMBH), based on its broad Mg ii emission-line profile from Gemini and Keck near-IR spectroscopy. The SMBH in J1007+2115 is twice as massive as that in quasar J1342+0928 at z = 7.54, the current quasar… 

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