| Title | A Luminous Quasar at Redshift 7.642 |
| Authors | Wang, Feige Yang, Jinyi Fan, Xiaohui Hennawi, Joseph F. Barth, Aaron J. Banados, Eduardo Bian, Fuyan Boutsia, Konstantina Connor, Thomas Davies, Frederick B. Decarli, Roberto Eilers, Anna-Christina Farina, Emanuele Paolo Green, Richard Jiang, Linhua Li, Jiang-Tao Mazzucchelli, Chiara Nanni, Riccardo Schindler, Jan-Torge Venemans, Bram Walter, Fabian Wu, Xue-Bing Yue, Minghao |
| Affiliation | Univ Arizona, Steward Observ, 933 North Cherry Ave, Tucson, AZ 85721 USA Univ Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106 USA Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg, Germany Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA European Southern Observ, Alonso Cordova 3107,Casilla 19001, Santiago 19, Chile Carnegie Observ, Las Campanas Observ, Casilla 601, La Serena, Chile CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA Lawrence Berkeley Natl Lab, 1 Cyclotron Rd, Berkeley, CA 94720 USA INAF, Osservatorio Astrofis & Sci Spazio Bologna, Via Gobetti 93-3, I-40129 Bologna, Italy MIT, Kavli Inst Astrophys & Space Res, 77 Massachusetts Ave,Bldg 37,Room 664L, Cambridge, MA 02139 USA Max Planck Inst Astrophys, Karl Schwarzschild Str 1, D-85748 Garching, Germany Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China Univ Michigan, Dept Astron, 311 West Hall,1085 South Univ Ave, Ann Arbor, MI 48109 USA Peking Univ, Sch Phys, Dept Astron, Beijing 100871, Peoples R China |
| Keywords | MASSIVE BLACK-HOLES EMISSION-LINE CONTINUUM |
| Issue Date | Jan-2021 |
| Publisher | ASTROPHYSICAL JOURNAL LETTERS |
| Abstract | 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 x 10(13)L. Deep spectroscopic observations reveal a SMBH with a mass of (1.6 0.4) x 10(9) M in this quasar. The existence of such a massive SMBH just similar to 670 million years after the big bang challenges significantly theoretical models of SMBH growth. In addition, the quasar spectrum exhibits strong broad absorption line (BAL) features in C iv and Si iv, with a maximum velocity close to 20% of the speed of light. The relativistic BAL features, combined with a strongly blueshifted C iv emission line, indicate that there is a strong active galactic nucleus (AGN)-driven outflow in this system. Atacama Large Millimeter/submillimeter Array observations detect the dust continuum and [C ii] emission from the quasar host galaxy, yielding an accurate redshift of 7.6423 0.0013 and suggesting that the quasar is hosted by an intensely star-forming galaxy, with a star formation rate of similar to 200 M yr(-1) and a dust mass of similar to 7 x 10(7) M. Follow-up observations of this reionization-era BAL quasar will provide a powerful probe of the effects of AGN feedback on the growth of the earliest massive galaxies. |
| URI | http://hdl.handle.net/20.500.11897/603323 |
| ISSN | 2041-8205 |
| DOI | 10.3847/2041-8213/abd8c6 |
| Indexed | SCI(E) |
| Appears in Collections: | 科维理天文与天体物理研究所 物理学院 |
