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Journal Article

The Discovery of a Luminous Broad Absorption Line Quasar at a Redshift of 7.02

MPS-Authors

Wang,  Feige
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Yang,  Jinyi
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Fan,  Xiaohui
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Yue,  Minghao
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Wu,  Xue-Bing
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Schindler,  Jan-Torge
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Bian,  Fuyan
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Li,  Jiang-Tao
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Farina,  Emanuele P.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Bañados,  Eduardo
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Davies,  Frederick B.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Decarli,  Roberto
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Green,  Richard
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Jiang,  Linhua
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Hennawi,  Joseph F.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Huang,  Yun-Hsin
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Mazzucchelli,  Chiara
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

McGreer,  Ian D.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Venemans,  Bram
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Walter,  Fabian
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Beletsky,  Yuri
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

External Resource

https://ui.adsabs.harvard.edu/abs/2018ApJ...869L...9W
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Citation

Wang, F., Yang, J., Fan, X., Yue, M., Wu, X.-B., Schindler, J.-T., et al. (2018). The Discovery of a Luminous Broad Absorption Line Quasar at a Redshift of 7.02. The Astrophysical Journal, 869.


Cite as: https://hdl.handle.net/21.11116/0000-0005-CA60-B
Abstract
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 ☉, 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.