AN ULTRA-LUMINOUS QUASAR AT z = 5.363 WITH A TEN BILLION SOLAR MASS BLACK HOLE AND A METAL-RICH DLA AT z ∼ 5

Feige Wang, Xue Bing Wu, Xiaohui Fan, Jinyi Yang, Zheng Cai, Weimin Yi, Wenwen Zuo, Ran Wang, Ian D. McGreer, Luis C. Ho, Minjin Kim, Qian Yang, Fuyan Bian, Linhua Jiang

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    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 MBH = (1.07 ± 0.27) × 1010 M. With an absolute magnitude M1450 = -28.92 and a bolometric luminosity Lbol ∼ 3.4 × 1014 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.

    Original languageEnglish
    Article numberL9
    JournalAstrophysical Journal Letters
    Volume807
    Issue number1
    DOIs
    Publication statusPublished - 1 Jul 2015

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