TY - JOUR
T1 - The Discovery of a Luminous Broad Absorption Line Quasar at a Redshift of 7.02
AU - Wang, Feige
AU - Yang, Jinyi
AU - Fan, Xiaohui
AU - Yue, Minghao
AU - Wu, Xue Bing
AU - Schindler, Jan Torge
AU - Bian, Fuyan
AU - Li, Jiang Tao
AU - Farina, Emanuele P.
AU - Bañados, Eduardo
AU - Davies, Frederick B.
AU - Decarli, Roberto
AU - Green, Richard
AU - Jiang, Linhua
AU - Hennawi, Joseph F.
AU - Huang, Yun Hsin
AU - Mazzucchelli, Chiara
AU - McGreer, Ian D.
AU - Venemans, Bram
AU - Walter, Fabian
AU - Beletsky, Yuri
N1 - Funding Information:
J. Yang, X. Fan, M. Yue, J.-T. Schindler, and I. D. McGreer acknowledge support from the US NSF grant AST-1515115 and NASA ADAP grant NNX17AF28G. X.-B.W. and L.J. acknowledge support from the National Key R&D Program of China (2016YFA0400703) and the National Science Foundation of China (11533001 and 11721303). B. Venemans and F. Walter acknowledge funding through the ERC grants “Cosmic Dawn” and “Cosmic Gas.” This research based on observations obtained at the Gemini Observatory (GN-2018AFT-114) and based on observations collected at the European Organization for Astronomical Research in the Southern Hemisphere under ESO program 2100.A-5033 (A). We especially thank the Directors of VLT, and UKIRT for granting us Director Discretionary time for follow-up observations of this object. We acknowledge the use of data obtained at the Gemini Observatory, Magellan Telescope, and MMT Observatory. We acknowledge the use of public DELS, PS1, and WISE data.
Publisher Copyright:
© 2018. The American Astronomical Society. All rights reserved..
PY - 2018/12/10
Y1 - 2018/12/10
N2 - Despite extensive efforts, to date only two quasars have been found at z > 7, due to a combination of low spatial density and high contamination from more ubiquitous Galactic cool dwarfs in quasar selection. This limits our current knowledge of the super-massive black hole growth mechanism and reionization history. In this Letter, we report the discovery of a luminous quasar at z = 7.021, DELS J003836.10-152723.6 (hereafter J0038-1527), selected using photometric data from Dark Energy Spectroscopic Instrument Legacy Imaging Survey, Pan-STARRS1 (PS1) imaging Survey, as well as Wide-field Infrared Survey Explore mid-infrared all-sky survey. With an absolute magnitude of M 1450 = -27.1 and bolometric luminosity of L Bol = 5.6 - 1013 L o, J0038-1527 is the most luminous quasar known at z > 7. Deep optical to near-infrared spectroscopic observations suggest that J0038-1527 hosts a 1.3 billion solar mass black hole accreting at the Eddington limit, with an Eddington ratio of 1.25 - 0.19. The C iv broad emission line of J0038-1527 is blueshifted by more than 3000 km s-1 relative to the quasar systemic redshift. More detailed investigations of the high-quality spectra reveal three extremely high-velocity C iv broad absorption lines with velocity from 0.08 to 0.14 times the speed of light and total "balnicity" index of more than 5000 km s-1, suggesting the presence of relativistic outflows. J0038-1527 is the first quasar found at the epoch of reionization with such strong outflows, and therefore provides a unique laboratory to investigate active galactic nuclei feedback on the formation and growth of the most massive galaxies in the early universe.
AB - Despite extensive efforts, to date only two quasars have been found at z > 7, due to a combination of low spatial density and high contamination from more ubiquitous Galactic cool dwarfs in quasar selection. This limits our current knowledge of the super-massive black hole growth mechanism and reionization history. In this Letter, we report the discovery of a luminous quasar at z = 7.021, DELS J003836.10-152723.6 (hereafter J0038-1527), selected using photometric data from Dark Energy Spectroscopic Instrument Legacy Imaging Survey, Pan-STARRS1 (PS1) imaging Survey, as well as Wide-field Infrared Survey Explore mid-infrared all-sky survey. With an absolute magnitude of M 1450 = -27.1 and bolometric luminosity of L Bol = 5.6 - 1013 L o, J0038-1527 is the most luminous quasar known at z > 7. Deep optical to near-infrared spectroscopic observations suggest that J0038-1527 hosts a 1.3 billion solar mass black hole accreting at the Eddington limit, with an Eddington ratio of 1.25 - 0.19. The C iv broad emission line of J0038-1527 is blueshifted by more than 3000 km s-1 relative to the quasar systemic redshift. More detailed investigations of the high-quality spectra reveal three extremely high-velocity C iv broad absorption lines with velocity from 0.08 to 0.14 times the speed of light and total "balnicity" index of more than 5000 km s-1, suggesting the presence of relativistic outflows. J0038-1527 is the first quasar found at the epoch of reionization with such strong outflows, and therefore provides a unique laboratory to investigate active galactic nuclei feedback on the formation and growth of the most massive galaxies in the early universe.
KW - cosmology: observations
KW - early universe
KW - galaxies: active
KW - galaxies: high-redshift
KW - quasars: individual (J0038-1527)
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U2 - 10.3847/2041-8213/aaf1d2
DO - 10.3847/2041-8213/aaf1d2
M3 - Article
AN - SCOPUS:85058481567
VL - 869
JO - Astrophysical Journal Letters
JF - Astrophysical Journal Letters
SN - 2041-8205
IS - 1
M1 - L9
ER -