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28 March 2024
 
  » arxiv » 1410.2689

 Article overview


SDSS J013127.34$-$032100.1: A newly discovered radio-loud quasar at $z=5.18$ with extremely high luminosity
Wei-Min Yi ; Feige Wang ; Xue-Bing Wu ; Jinyi Yang ; Jin-Ming Bai ; Xiaohui Fan ; William N. Brandt ; Luis C. Ho ; Wenwen Zuo ; Minjin Kim ; Ran Wang ; Qian Yang ; Ju-jia Zhang ; Fang Wang ; Jian-Guo Wang ; Yanli Ai ; Yu-Feng Fan ; Liang Chang ; Chuan-Jun Wang ; Bao-Li Lun ; Yu-Xin Xin ;
Date 10 Oct 2014
AbstractOnly very few z>5 quasars discovered to date are radio-loud, with a radio-to-optical flux ratio (radio-loudness parameter) higher than 10. Here we report the discovery of an optically luminous radio-loud quasar, SDSS J013127.34-032100.1 (J0131-0321 in short), at z=5.18+-0.01 using the Lijiang 2.4m and Magellan telescopes. J0131-0321 has a spectral energy distribution consistent with that of radio-loud quasars. With an i-band magnitude of 18.47 and radio flux density of 33 mJy, its radio-loudness parameter is ~100. The optical and near-infrared spectra taken by Magellan enable us to estimate its bolometric luminosity to be L_bol ~ 1.1E48 erg/s, approximately 4.5 times greater than that of the most distant quasar known to date. The black hole mass of J0131-0321 is estimated to be 2.7E9 solar masses, with an uncertainty up to 0.4 dex. Detailed physical properties of this high-redshift, radio-loud, potentially super-Eddington quasar can be probed in the future with more dedicated and intensive follow-up observations using multi-wavelength facilities.
Source arXiv, 1410.2689
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