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• W3099051570 endingPage "113" @default.
• W3099051570 startingPage "113" @default.
• W3099051570 abstract "We present the discovery of Balmer line absorption from H$alpha$ to H$gamma$ in an iron low-ionization broad absorption line (FeLoBAL) quasar SDSS J152350.42+391405.2 (hereafter J1523), by the quasi-simultaneous optical and near-infrared spectroscopy. The Balmer line absorption is at $z_{absor}$ = 0.6039 +/-0.0021 and blueshifted by v=10,353 km/s with respect to the Balmer emission lines. All Balmer BALs have uniform absorption profile with the widths of $Delta$ v ~12,000 km/s. We also found the absorption trough in He 1* $lambda$10830 with the same velocity and width in the H-band TripleSpec spectrum of J1523. This object is only the tenth active galactic nucleus known to exhibit non-stellar Balmer absorption, and also the case with the highest velocity and broadest Balmer absorption lines which have ever been found. A CLOUDY analysis shows that the absorbers require an gas density of $log_{10} n_ e (cm^{-3})=9$ and an ionization parameter of $log_{10} U=-1.0$. They locate at a distance of ~0.2 pc from the central ionizing source which is slightly farther than that of BELRs. Furthermore, J1523 is one of the brightest Balmer-BAL quasar ever reported, with unique iron absorption variations, making it as the most promising candidate for follow up high-resolution spectroscopy, multi-band observations, and long-term monitoring." @default.
• W3099051570 created "2020-11-23" @default.
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• W3099051570 date "2015-12-15" @default.
• W3099051570 modified "2023-09-26" @default.
• W3099051570 title "DISCOVERY OF EXTREMELY BROAD BALMER ABSORPTION LINES IN SDSS J152350.42+391405.2" @default.
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• W3099051570 doi "https://doi.org/10.1088/0004-637x/815/2/113" @default.
• W3099051570 hasPublicationYear "2015" @default.
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