An Ultra-luminous Quasar at z = 5.363 with a Ten Billion Solar Mass Black Hole and a Metal-rich DLA at z ∼ 5
Abstract
We report the discovery of an ultra-luminous quasar J030642.51+185315.8 (hereafter J0306+1853) at redshift 5.363, which hosts a supermassive black hole with {M}{BH}=(1.07+/- 0.27)× {10}10 {M}⊙ . With an absolute magnitude {M}1450=-28.92 and a bolometric luminosity {L}{bol}∼ 3.4× {10}14{L}⊙ , J0306+1853 is one of the most luminous objects in the early universe. It is not likely to be a beamed source based on its small flux variability, low radio loudness, and normal broad emission lines. In addition, a z=4.986 damped Lyα system (DLA) with [{{M}}/{{H}}]=-1.3+/- 0.1, among the most metal-rich DLAs at z≳ 5, is detected in the absorption spectrum of this quasar. This ultra-luminous quasar puts strong constraints on the bright end of the quasar luminosity function and massive end of the black hole mass function. It will provide a unique laboratory for the study of BH growth and the co-evolution between a BH and the host galaxy with multi-wavelength follow-up observations. The future high-resolution spectra will give more insight into the DLA and other absorption systems along the line of sight of J0306+1853.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- July 2015
- DOI:
- 10.1088/2041-8205/807/1/L9
- arXiv:
- arXiv:1506.01765
- Bibcode:
- 2015ApJ...807L...9W
- Keywords:
-
- galaxies: active;
- galaxies: high-redshift;
- quasars: absorption lines;
- quasars: emission lines;
- quasars: individual: SDSS J0306+1853;
- Astrophysics - Astrophysics of Galaxies
- E-Print:
- 5 pages, 3 figures, accepted for publication in ApJL