Grier, Catherine J.
Trump, Jonathan R.
Brandt, William N.
AffiliationUniv Arizona, Steward Observ
quasars: absorption lines
quasars: individual (J0122+1216)
MetadataShow full item record
PublisherIOP PUBLISHING LTD
CitationThe Physical Constraints on a New LoBAL QSO at z = 4.82 2017, 838 (2):135 The Astrophysical Journal
JournalThe Astrophysical Journal
Rights© 2017. The American Astronomical Society. All rights reserved.
Collection InformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at email@example.com.
AbstractVery 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 similar to 2.3 x 10(9) M-circle dot and Eddington ratio of similar to 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% L-Edd) 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.
VersionFinal published version
SponsorsWest Light Foundation of The Chinese Academy of Sciences [Y6XB016001]; China Scholarships Council ; NSF [AST-1516784, AST-1517113]; Key Research Program of the CAS [KJZD-EW-M06]; NSFC [11133006, 11433004]; NASA; National Astronomical Observatories of China; Chinese Academy of Sciences (Strategic Priority Research Program "The Emergence of Cosmological Structures") [XDB09000000]; Special Fund for Astronomy from the Ministry of Finance; CAS; People's Government of Yunnan Province