Broad absorption line quasars in the sloan digital sky survey with VLA first radio detections

Kristen Menou; Daniel E. Vanden Berk; Željko Ivezić; Rita S.J. Kim; Gillian R. Knapp; Gordon T. Richards; Iskra Strateva; Xiaohui Fan; James E. Gunn; Patrick B. Hall; Tim Heckman; Julian Krolik; Robert H. Lupton; Donald P. Schneider; Donald G. York; S. F. Anderson; N. A. Bahcall; J. Brinkmann; R. Brunner; I. Csabai; M. Fukugita; G. S. Hennessy; P. Z. Kunszt; D. Q. Lamb; J. A. Munn; R. C. Nichol; G. P. Szokoly

doi:10.1086/323218

Broad absorption line quasars in the sloan digital sky survey with VLA first radio detections

Kristen Menou, Daniel E. Vanden Berk, Željko Ivezić, Rita S.J. Kim, Gillian R. Knapp, Gordon T. Richards, Iskra Strateva, Xiaohui Fan, James E. Gunn, Patrick B. Hall, Tim Heckman, Julian Krolik, Robert H. Lupton, Donald P. Schneider, Donald G. York, S. F. Anderson, N. A. Bahcall, J. Brinkmann, R. Brunner, I. CsabaiM. Fukugita, G. S. Hennessy, P. Z. Kunszt, D. Q. Lamb, J. A. Munn, R. C. Nichol, G. P. Szokoly

Astrophysical Sciences

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52 Scopus citations

Abstract

We 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 deg², 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.

Original language	English (US)
Pages (from-to)	645-652
Number of pages	8
Journal	Astrophysical Journal
Volume	561
Issue number	2 PART 1
DOIs	https://doi.org/10.1086/323218
State	Published - Nov 10 2001

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

Keywords

Catalogs
Galaxies: active
Quasars: absorption lines
Quasars: general radio continuum: general
Surveys

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10.1086/323218

Cite this

Menou, K., Vanden Berk, D. E., Ivezić, Ž., Kim, R. S. J., Knapp, G. R., Richards, G. T., Strateva, I., Fan, X., Gunn, J. E., Hall, P. B., Heckman, T., Krolik, J., Lupton, R. H., Schneider, D. P., York, D. G., Anderson, S. F., Bahcall, N. A., Brinkmann, J., Brunner, R., ... Szokoly, G. P. (2001). Broad absorption line quasars in the sloan digital sky survey with VLA first radio detections. Astrophysical Journal, 561(2 PART 1), 645-652. https://doi.org/10.1086/323218

@article{26467e87cbfb409b8853e88b1b6173c1,

title = "Broad absorption line quasars in the sloan digital sky survey with VLA first radio detections",

abstract = "We 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 deg2, 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.",

keywords = "Catalogs, Galaxies: active, Quasars: absorption lines, Quasars: general radio continuum: general, Surveys",

author = "Kristen Menou and {Vanden Berk}, {Daniel E.} and {\v Z}eljko Ivezi{\'c} and Kim, {Rita S.J.} and Knapp, {Gillian R.} and Richards, {Gordon T.} and Iskra Strateva and Xiaohui Fan and Gunn, {James E.} and Hall, {Patrick B.} and Tim Heckman and Julian Krolik and Lupton, {Robert H.} and Schneider, {Donald P.} and York, {Donald G.} and Anderson, {S. F.} and Bahcall, {N. A.} and J. Brinkmann and R. Brunner and I. Csabai and M. Fukugita and Hennessy, {G. S.} and Kunszt, {P. Z.} and Lamb, {D. Q.} and Munn, {J. A.} and Nichol, {R. C.} and Szokoly, {G. P.}",

year = "2001",

month = nov,

day = "10",

doi = "10.1086/323218",

language = "English (US)",

volume = "561",

pages = "645--652",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "IOP Publishing Ltd.",

number = "2 PART 1",

}

Menou, K, Vanden Berk, DE, Ivezić, Ž, Kim, RSJ, Knapp, GR, Richards, GT, Strateva, I, Fan, X, Gunn, JE, Hall, PB, Heckman, T, Krolik, J, Lupton, RH, Schneider, DP, York, DG, Anderson, SF, Bahcall, NA, Brinkmann, J, Brunner, R, Csabai, I, Fukugita, M, Hennessy, GS, Kunszt, PZ, Lamb, DQ, Munn, JA, Nichol, RC & Szokoly, GP 2001, 'Broad absorption line quasars in the sloan digital sky survey with VLA first radio detections', Astrophysical Journal, vol. 561, no. 2 PART 1, pp. 645-652. https://doi.org/10.1086/323218

TY - JOUR

T1 - Broad absorption line quasars in the sloan digital sky survey with VLA first radio detections

AU - Menou, Kristen

AU - Vanden Berk, Daniel E.

AU - Ivezić, Željko

AU - Kim, Rita S.J.

AU - Knapp, Gillian R.

AU - Richards, Gordon T.

AU - Strateva, Iskra

AU - Fan, Xiaohui

AU - Gunn, James E.

AU - Hall, Patrick B.

AU - Heckman, Tim

AU - Krolik, Julian

AU - Lupton, Robert H.

AU - Schneider, Donald P.

AU - York, Donald G.

AU - Anderson, S. F.

AU - Bahcall, N. A.

AU - Brinkmann, J.

AU - Brunner, R.

AU - Csabai, I.

AU - Fukugita, M.

AU - Hennessy, G. S.

AU - Kunszt, P. Z.

AU - Lamb, D. Q.

AU - Munn, J. A.

AU - Nichol, R. C.

AU - Szokoly, G. P.

PY - 2001/11/10

Y1 - 2001/11/10

N2 - We 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 deg2, 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.

AB - We 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 deg2, 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.

KW - Catalogs

KW - Galaxies: active

KW - Quasars: absorption lines

KW - Quasars: general radio continuum: general

KW - Surveys

UR - http://www.scopus.com/inward/record.url?scp=0035841725&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0035841725&partnerID=8YFLogxK

U2 - 10.1086/323218

DO - 10.1086/323218

M3 - Article

AN - SCOPUS:0035841725

SN - 0004-637X

VL - 561

SP - 645

EP - 652

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2 PART 1

ER -

Broad absorption line quasars in the sloan digital sky survey with VLA first radio detections

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