| Autor: |
Weimin Yi, Richard Green, Jin-Ming Bai, Tinggui Wang, Catherine J. Grier, Jonathan R. Trump, William N. Brandt, Wenwen Zuo, Jinyi Yang, Feige Wang, Chenwei Yang, Xue-Bing Wu, Hongyan Zhou, Xiaohui Fan, Linhua Jiang, Qian Yang, Watson Varricatt, Tom Kerr, Peter Milne, Sam Benigni |
| Předmět: |
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| Zdroj: |
Astrophysical Journal; 4/1/2017, Vol. 838 Issue 2, p1-1, 1p |
| Abstrakt: |
Very few low-ionization broad absorption line (LoBAL) QSOs have been found at high redshifts, to date. One high-redshift LoBAL QSO, J0122+1216, was recently discovered by the Lijiang 2.4 m Telescope, with an initial redshift determination of 4.76. Aiming to investigate its physical properties, we carried out follow-up observations in the optical and near-IR spectroscopy. Near-IR spectra from UKIRT and P200 confirm that it is a LoBAL, with a new redshift determination of 4.82 ± 0.01 based on the Mg ii emission-line. The new Mg ii redshift determination reveals strong blueshifts and asymmetry of the high-ionization emission lines. We estimate a black hole mass of ∼2.3 × 109M⊙ and Eddington ratio of ∼1.0 according to the empirical Mg ii-based single-epoch relation and bolometric correction factor. It is possible that strong outflows are the result of an extreme quasar environment driven by the high Eddington ratio. A lower limit on the outflowing kinetic power (>0.9% LEdd) is derived from both emission and absorption lines, indicating that these outflows play a significant role in the feedback process that regulates the growth of its black hole, as well as host galaxy evolution. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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