Broad absorption line quasars in the Sloan Digital Sky Survey with VLA first radio detections

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dc.contributor.authorMenou, K
dc.contributor.authorVanden Berg, DE
dc.contributor.authorKim, RSJ
dc.contributor.authorKnapp, GR
dc.contributor.authorRichards, GT
dc.contributor.authorStrateva, I
dc.contributor.authorFan, XH
dc.contributor.authorGunn, JE
dc.contributor.authorHall, PB
dc.contributor.authorHeckman, T
dc.contributor.authorKrolik, J
dc.contributor.authorLupton, RH
dc.contributor.authorSchneider, DP
dc.contributor.authorYork, DG
dc.contributor.authorAnderson, SF
dc.contributor.authorBahcall, NA
dc.contributor.authorBrinkmann, J
dc.contributor.authorBrunner, R
dc.contributor.authorCsabai, I
dc.contributor.authorFukugita, M
dc.contributor.authorHennessy, GS
dc.contributor.authorKunszt, PZ
dc.contributor.authorLamb, DQ
dc.contributor.authorMunn, JA
dc.contributor.authorNichol, RC
dc.contributor.authorSzokoly, GP
dc.date.accessioned2025-01-21T01:30:38Z
dc.date.available2025-01-21T01:30:38Z
dc.date.issued2001
dc.description.abstractWe present 13 broad absorption line (BAL) quasars, including 12 new objects, identified in the Sloan Digital Sky Survey (SDSS) and matched within 2 " to sources in the FIRST radio survey catalog. The surface density of this sample of radio-detected BAL quasars is 4.5 +/- 1.2 per 100 deg(2), i.e., approximately 4 times as high as previously found by the shallower FIRST Bright Quasar Survey (FBQS). A majority of these radio-detected BAL quasars are moderately radio-loud objects. The fraction of BAL quasars in the entire radio quasar sample, 4.8% +/- 1.3%, is comparable to the fraction of BAL quasars among the SDSS optical quasar sample (ignoring selection effects). We estimate that the true fraction of BAL quasars (mostly "HiBALs") in the radio sample is 9.2% +/- 2.6%, once selection effects are accounted for. We caution that the absorption troughs of four of the 13 radio-detected quasars considered do not strictly satisfy the standard BALnicity criteria. One or possibly two of the new radio-detected BAL quasars are of the rare "FeLoBAL" type. BAL quasars are generally redder than the median SDSS quasar at the same redshift.
dc.fuente.origenWOS
dc.identifier.issn0004-637X
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/96839
dc.identifier.wosidWOS:000172188800011
dc.issue.numero2
dc.language.isoen
dc.pagina.final652
dc.pagina.inicio645
dc.revistaAstrophysical journal
dc.rightsacceso restringido
dc.subjectcatalogs
dc.subjectgalaxies : active
dc.subjectquasars : absorption lines
dc.subjectquasars : general
dc.subjectradio continuum : general
dc.subjectsurveys
dc.titleBroad absorption line quasars in the Sloan Digital Sky Survey with VLA first radio detections
dc.typeartículo
dc.volumen561
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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