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A SCUBA-2 survey of FeLoBAL QSOs. Are FeLoBALs in a `transition phase' between ULIRGs and QSOs?

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A SCUBA-2 survey of FeLoBAL QSOs. Are FeLoBALs in a `transition phase' between ULIRGs and QSOs? / Violino, Giulio; Coppin, Kristen E. K.; Stevens, Jason A. et al.
In: Monthly Notices of the Royal Astronomical Society, Vol. 457, No. 2, 01.04.2016, p. 1371-1384.

Research output: Contribution to Journal/MagazineJournal articlepeer-review

Harvard

Violino, G, Coppin, KEK, Stevens, JA, Farrah, D, Geach, JE, Alexander, DM, Hickox, R, Smith, DJB & Wardlow, JL 2016, 'A SCUBA-2 survey of FeLoBAL QSOs. Are FeLoBALs in a `transition phase' between ULIRGs and QSOs?', Monthly Notices of the Royal Astronomical Society, vol. 457, no. 2, pp. 1371-1384. https://doi.org/10.1093/mnras/stv2937

APA

Violino, G., Coppin, K. E. K., Stevens, J. A., Farrah, D., Geach, J. E., Alexander, D. M., Hickox, R., Smith, D. J. B., & Wardlow, J. L. (2016). A SCUBA-2 survey of FeLoBAL QSOs. Are FeLoBALs in a `transition phase' between ULIRGs and QSOs? Monthly Notices of the Royal Astronomical Society, 457(2), 1371-1384. https://doi.org/10.1093/mnras/stv2937

Vancouver

Violino G, Coppin KEK, Stevens JA, Farrah D, Geach JE, Alexander DM et al. A SCUBA-2 survey of FeLoBAL QSOs. Are FeLoBALs in a `transition phase' between ULIRGs and QSOs? Monthly Notices of the Royal Astronomical Society. 2016 Apr 1;457(2):1371-1384. Epub 2016 Feb 4. doi: 10.1093/mnras/stv2937

Author

Violino, Giulio ; Coppin, Kristen E. K. ; Stevens, Jason A. et al. / A SCUBA-2 survey of FeLoBAL QSOs. Are FeLoBALs in a `transition phase' between ULIRGs and QSOs?. In: Monthly Notices of the Royal Astronomical Society. 2016 ; Vol. 457, No. 2. pp. 1371-1384.

Bibtex

@article{104321a7f9d141c1bec93f850a92045f,
title = "A SCUBA-2 survey of FeLoBAL QSOs. Are FeLoBALs in a `transition phase' between ULIRGs and QSOs?",
abstract = "It is thought that a class of broad absorption line (BAL) QSOs, characterized by Fe absorption features in their UV spectra (called `FeLoBALs'), could mark a transition stage between the end of an obscured starburst event and a youthful QSO beginning to shed its dust cocoon, where Fe has been injected into the interstellar medium by the starburst. To test this hypothesis, we have undertaken deep Submillimetre Common-User Bolometer Array 2 (SCUBA-2) 850 μm observations of a sample of 17 FeLoBAL QSOs with 0.89 ≤ z ≤ 2.78 and -23.31 ≤ MB ≤ -28.50 to directly detect an excess in the thermal emission of the dust which would probe enhanced star formation activity. We find that FeLoBALs are not luminous sources in the sub-mm, none of them are individually detected at 850 μm, nor as a population through stacking (Fs = 1.14 ± 0.58 mJy). Statistical and survival analyses reveal that FeLoBALs have sub-mm properties consistent with BAL and non-BAL QSOs with matched redshifts and magnitudes. An Spectral Energy Distribution fitting analysis shows that the far-infrared emission is dominated by active galactic nuclei activity, and a starburst component is required only in 6/17 sources of our sample; moreover the integrated total luminosity of 16/17 sources is L ≥ 1012 L⊙, high enough to classify FeLoBALs as infrared luminous. In conclusion, we do not find any evidence in support of FeLoBAL QSOs being a transition population between an ultraluminous infrared galaxy (ULIRG) and an unobscured QSO; in particular, FeLoBALs are not characterized by a cold starburst which would support this hypothesis.",
keywords = "galaxies: evolution, galaxies: formation, galaxies: high-redshift, quasars: absorption lines, submillimetre: galaxies",
author = "Giulio Violino and Coppin, {Kristen E. K.} and Stevens, {Jason A.} and Duncan Farrah and Geach, {James E.} and Alexander, {Dave M.} and Ryan Hickox and Smith, {Daniel J. B.} and Wardlow, {Julie L.}",
year = "2016",
month = apr,
day = "1",
doi = "10.1093/mnras/stv2937",
language = "English",
volume = "457",
pages = "1371--1384",
journal = "Monthly Notices of the Royal Astronomical Society",
issn = "0035-8711",
publisher = "OXFORD UNIV PRESS",
number = "2",

}

RIS

TY - JOUR

T1 - A SCUBA-2 survey of FeLoBAL QSOs. Are FeLoBALs in a `transition phase' between ULIRGs and QSOs?

AU - Violino, Giulio

AU - Coppin, Kristen E. K.

AU - Stevens, Jason A.

AU - Farrah, Duncan

AU - Geach, James E.

AU - Alexander, Dave M.

AU - Hickox, Ryan

AU - Smith, Daniel J. B.

AU - Wardlow, Julie L.

PY - 2016/4/1

Y1 - 2016/4/1

N2 - It is thought that a class of broad absorption line (BAL) QSOs, characterized by Fe absorption features in their UV spectra (called `FeLoBALs'), could mark a transition stage between the end of an obscured starburst event and a youthful QSO beginning to shed its dust cocoon, where Fe has been injected into the interstellar medium by the starburst. To test this hypothesis, we have undertaken deep Submillimetre Common-User Bolometer Array 2 (SCUBA-2) 850 μm observations of a sample of 17 FeLoBAL QSOs with 0.89 ≤ z ≤ 2.78 and -23.31 ≤ MB ≤ -28.50 to directly detect an excess in the thermal emission of the dust which would probe enhanced star formation activity. We find that FeLoBALs are not luminous sources in the sub-mm, none of them are individually detected at 850 μm, nor as a population through stacking (Fs = 1.14 ± 0.58 mJy). Statistical and survival analyses reveal that FeLoBALs have sub-mm properties consistent with BAL and non-BAL QSOs with matched redshifts and magnitudes. An Spectral Energy Distribution fitting analysis shows that the far-infrared emission is dominated by active galactic nuclei activity, and a starburst component is required only in 6/17 sources of our sample; moreover the integrated total luminosity of 16/17 sources is L ≥ 1012 L⊙, high enough to classify FeLoBALs as infrared luminous. In conclusion, we do not find any evidence in support of FeLoBAL QSOs being a transition population between an ultraluminous infrared galaxy (ULIRG) and an unobscured QSO; in particular, FeLoBALs are not characterized by a cold starburst which would support this hypothesis.

AB - It is thought that a class of broad absorption line (BAL) QSOs, characterized by Fe absorption features in their UV spectra (called `FeLoBALs'), could mark a transition stage between the end of an obscured starburst event and a youthful QSO beginning to shed its dust cocoon, where Fe has been injected into the interstellar medium by the starburst. To test this hypothesis, we have undertaken deep Submillimetre Common-User Bolometer Array 2 (SCUBA-2) 850 μm observations of a sample of 17 FeLoBAL QSOs with 0.89 ≤ z ≤ 2.78 and -23.31 ≤ MB ≤ -28.50 to directly detect an excess in the thermal emission of the dust which would probe enhanced star formation activity. We find that FeLoBALs are not luminous sources in the sub-mm, none of them are individually detected at 850 μm, nor as a population through stacking (Fs = 1.14 ± 0.58 mJy). Statistical and survival analyses reveal that FeLoBALs have sub-mm properties consistent with BAL and non-BAL QSOs with matched redshifts and magnitudes. An Spectral Energy Distribution fitting analysis shows that the far-infrared emission is dominated by active galactic nuclei activity, and a starburst component is required only in 6/17 sources of our sample; moreover the integrated total luminosity of 16/17 sources is L ≥ 1012 L⊙, high enough to classify FeLoBALs as infrared luminous. In conclusion, we do not find any evidence in support of FeLoBAL QSOs being a transition population between an ultraluminous infrared galaxy (ULIRG) and an unobscured QSO; in particular, FeLoBALs are not characterized by a cold starburst which would support this hypothesis.

KW - galaxies: evolution

KW - galaxies: formation

KW - galaxies: high-redshift

KW - quasars: absorption lines

KW - submillimetre: galaxies

U2 - 10.1093/mnras/stv2937

DO - 10.1093/mnras/stv2937

M3 - Journal article

VL - 457

SP - 1371

EP - 1384

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

SN - 0035-8711

IS - 2

ER -