Extreme BAL Quasars from the Sloan Digital Sky Survey

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dc.creatorHall, Patrick B.
dc.creatorGunn, J. E.
dc.creatorKnapp, G. R.
dc.creatorNarayanan, V. K.
dc.creatorStrauss, M. A.
dc.creatorAnderson, S. F.
dc.creatorBerk, D. E. Vanden
dc.creatorHeckman, T. M.
dc.creatorKrolik, J. H.
dc.creatorTsvetanov, Z. I.
dc.creatorZheng, W.
dc.creatorRichards, G. T.
dc.creatorSchneider, D. P.
dc.creatorFan, X.
dc.creatorYork, D. G.
dc.creatorGeballe, T. R.
dc.creatorDavis, M.
dc.creatorBecker, R. H.
dc.creatorBrunner, R. J.
dc.date2001-07-10
dc.date.accessioned2026-07-07T01:59:15Z
dc.date.available2026-07-07T01:59:15Z
dc.descriptionThe Sloan Digital Sky Survey has discovered a population of broad absorption line quasars with various extreme properties. Many show absorption from metastable states of FeII with varying excitations; several objects are almost completely absorbed bluewards of MgII; at least one shows stronger absorption from FeIII than FeII, indicating temperatures T>35000 K in the absorbing region; and one object even seems to have broad H-beta absorption. Many of these extreme BALs are also heavily reddened, though `normal' BALs (particularly LoBALs) from SDSS also show evidence for internal reddening.
dc.description6 pages, 5 figures. To appear in Mass Outflow in Active Galactic Nuclei: New Perspectives, eds. D. M. Crenshaw, S. B. Kraemer, and I. M. George
dc.identifierhttps://arxiv.org/abs/astro-ph/0107182
dc.identifierhttp://arxiv.org/abs/astro-ph/0107182
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/3038
dc.subjectAstrophysics
dc.titleExtreme BAL Quasars from the Sloan Digital Sky Survey
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