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arXiv · 1410.2689

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
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Abstract

Only 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.

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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. 2014-10-10. SDSS J013127.34$-$032100.1: A newly discovered radio-loud quasar at $z=5.18$ with extremely high luminosity. https://doi.org/10.1088/2041-8205/795/2/l29

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