SDSS J013127.34\ndash032100.1: A Newly Discovered Radio-loud Quasar at z = 5.18 with Extremely High Luminosity

TitleSDSS J013127.34\ndash032100.1: A Newly Discovered Radio-loud Quasar at z = 5.18 with Extremely High Luminosity
Publication TypeJournal Article
Year of Publication2014
AuthorsYi, W-M, Wang, F, Wu, X-B, Yang, J, Bai, J-M, Fan, X, Brandt, W N, Ho, L C, Zuo, W, Kim, M, Wang, R, Yang, Q, Zhang, J-j., Wang, F, Wang, J-G, Ai, Y, Fan, Y-F, Chang, L, Wang, C-J, Lun, B-L, Xin, Y-X
Journal\apjl
Volume795
PaginationL29
Keywordsgalaxies: active, galaxies: high-redshift, quasars: individual: SDSS J0131-0321
Abstract

{Very few of the z {\gt} 5 quasars discovered to date have been radio-loud, with radio-to-optical flux ratios (radio-loudness parameters) higher than 10. Here we report the discovery of an optically luminous radio-loud quasar, SDSS J013127.34{\ndash}032100.1 (J0131{\ndash}0321 in short), at z = 5.18 {\plusmn} 0.01 using the Lijiang 2.4 m and Magellan telescopes. J0131{\ndash}0321 has a spectral energy distribution consistent with that of radio-loud quasars. With an i-band magnitude of 18.47 and a 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 $_{bol}$ \~{} 1.1 {\times} 10$^{48}$ erg s$^{–1}$, approximately 4.5 times greater than that of the most distant quasar known to date. The black hole mass of J0131{\ndash}0321 is estimated to be 2.7 {\times} 10⁹ M $_{☉}$, 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. }

DOI10.1088/2041-8205/795/2/L29
Undefined