A connection between obscuration and star formation in luminous quasars

Chien Ting J. Chen; Ryan C. Hickox; Stacey Alberts; Chris M. Harrison; David M. Alexander; Roberto Assef; Mark Brodwin; Michael J.I. Brown; Agnese Del Moro; William R. Forman; Varoujan Gorjian; Andrew D. Goulding; Kevin N. Hainline; Christine Jones; Christopher S. Kochanek; Stephen S. Murray; Alexandra Pope; Emmanouel Rovilos; Daniel Stern

doi:10.1088/0004-637X/802/1/50

A connection between obscuration and star formation in luminous quasars

Chien Ting J. Chen, Ryan C. Hickox, Stacey Alberts, Chris M. Harrison, David M. Alexander, Roberto Assef, Mark Brodwin, Michael J.I. Brown, Agnese Del Moro, William R. Forman, Varoujan Gorjian, Andrew D. Goulding, Kevin N. Hainline, Christine Jones, Christopher S. Kochanek, Stephen S. Murray, Alexandra Pope, Emmanouel Rovilos, Daniel Stern

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49 Scopus citations

Abstract

We present a measurement of the star formation properties of a uniform sample of mid-IR-selected, optically unobscured, and obscured quasars (QSO1s and QSO2s) in the Boötessurvey region. We use a spectral energy distribution analysis for photometric data spanning optical to far-IR wavelengths to separate the active galactic nucleus (AGN) and host galaxy components. We find that when compared to a matched sample of QSO1s, the QSO2s have roughly twice the far-IR detection fractions, far-IR fluxes, and infrared star formation luminosities (L_IR ^SF). Correspondingly, we show that the AGN obscured fraction rises from 0.3 to 0.7 between (440) 10¹¹L_O. We also find evidence associating X-ray absorption with the presence of far-IR-emitting dust. Overall, these results are consistent with galaxy evolution models in which quasar obscuration is associated with dust-enshrouded starburst galaxies.

Original language	English (US)
Article number	50
Journal	Astrophysical Journal
Volume	802
Issue number	1
DOIs	https://doi.org/10.1088/0004-637X/802/1/50
State	Published - Mar 20 2015
Externally published	Yes

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

Keywords

galaxies: active
galaxies: starburst
infrared: galaxies
quasars: general
X-rays: galaxies

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10.1088/0004-637X/802/1/50

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Chen, C. T. J., Hickox, R. C., Alberts, S., Harrison, C. M., Alexander, D. M., Assef, R., Brodwin, M., Brown, M. J. I., Moro, A. D., Forman, W. R., Gorjian, V., Goulding, A. D., Hainline, K. N., Jones, C., Kochanek, C. S., Murray, S. S., Pope, A., Rovilos, E., & Stern, D. (2015). A connection between obscuration and star formation in luminous quasars. Astrophysical Journal, 802(1), Article 50. https://doi.org/10.1088/0004-637X/802/1/50

@article{1f185dadac5b498489d298365b0f0873,

title = "A connection between obscuration and star formation in luminous quasars",

abstract = "We present a measurement of the star formation properties of a uniform sample of mid-IR-selected, optically unobscured, and obscured quasars (QSO1s and QSO2s) in the Bo{\"o}tessurvey region. We use a spectral energy distribution analysis for photometric data spanning optical to far-IR wavelengths to separate the active galactic nucleus (AGN) and host galaxy components. We find that when compared to a matched sample of QSO1s, the QSO2s have roughly twice the far-IR detection fractions, far-IR fluxes, and infrared star formation luminosities (LIR SF). Correspondingly, we show that the AGN obscured fraction rises from 0.3 to 0.7 between (440) 1011LO. We also find evidence associating X-ray absorption with the presence of far-IR-emitting dust. Overall, these results are consistent with galaxy evolution models in which quasar obscuration is associated with dust-enshrouded starburst galaxies.",

keywords = "galaxies: active, galaxies: starburst, infrared: galaxies, quasars: general, X-rays: galaxies",

author = "Chen, {Chien Ting J.} and Hickox, {Ryan C.} and Stacey Alberts and Harrison, {Chris M.} and Alexander, {David M.} and Roberto Assef and Mark Brodwin and Brown, {Michael J.I.} and Moro, {Agnese Del} and Forman, {William R.} and Varoujan Gorjian and Goulding, {Andrew D.} and Hainline, {Kevin N.} and Christine Jones and Kochanek, {Christopher S.} and Murray, {Stephen S.} and Alexandra Pope and Emmanouel Rovilos and Daniel Stern",

year = "2015",

month = mar,

day = "20",

doi = "10.1088/0004-637X/802/1/50",

language = "English (US)",

volume = "802",

journal = "Astrophysical Journal",

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Chen, CTJ, Hickox, RC, Alberts, S, Harrison, CM, Alexander, DM, Assef, R, Brodwin, M, Brown, MJI, Moro, AD, Forman, WR, Gorjian, V, Goulding, AD, Hainline, KN, Jones, C, Kochanek, CS, Murray, SS, Pope, A, Rovilos, E & Stern, D 2015, 'A connection between obscuration and star formation in luminous quasars', Astrophysical Journal, vol. 802, no. 1, 50. https://doi.org/10.1088/0004-637X/802/1/50

TY - JOUR

T1 - A connection between obscuration and star formation in luminous quasars

AU - Chen, Chien Ting J.

AU - Hickox, Ryan C.

AU - Alberts, Stacey

AU - Harrison, Chris M.

AU - Alexander, David M.

AU - Assef, Roberto

AU - Brodwin, Mark

AU - Brown, Michael J.I.

AU - Moro, Agnese Del

AU - Forman, William R.

AU - Gorjian, Varoujan

AU - Goulding, Andrew D.

AU - Hainline, Kevin N.

AU - Jones, Christine

AU - Kochanek, Christopher S.

AU - Murray, Stephen S.

AU - Pope, Alexandra

AU - Rovilos, Emmanouel

AU - Stern, Daniel

PY - 2015/3/20

Y1 - 2015/3/20

N2 - We present a measurement of the star formation properties of a uniform sample of mid-IR-selected, optically unobscured, and obscured quasars (QSO1s and QSO2s) in the Boötessurvey region. We use a spectral energy distribution analysis for photometric data spanning optical to far-IR wavelengths to separate the active galactic nucleus (AGN) and host galaxy components. We find that when compared to a matched sample of QSO1s, the QSO2s have roughly twice the far-IR detection fractions, far-IR fluxes, and infrared star formation luminosities (LIR SF). Correspondingly, we show that the AGN obscured fraction rises from 0.3 to 0.7 between (440) 1011LO. We also find evidence associating X-ray absorption with the presence of far-IR-emitting dust. Overall, these results are consistent with galaxy evolution models in which quasar obscuration is associated with dust-enshrouded starburst galaxies.

AB - We present a measurement of the star formation properties of a uniform sample of mid-IR-selected, optically unobscured, and obscured quasars (QSO1s and QSO2s) in the Boötessurvey region. We use a spectral energy distribution analysis for photometric data spanning optical to far-IR wavelengths to separate the active galactic nucleus (AGN) and host galaxy components. We find that when compared to a matched sample of QSO1s, the QSO2s have roughly twice the far-IR detection fractions, far-IR fluxes, and infrared star formation luminosities (LIR SF). Correspondingly, we show that the AGN obscured fraction rises from 0.3 to 0.7 between (440) 1011LO. We also find evidence associating X-ray absorption with the presence of far-IR-emitting dust. Overall, these results are consistent with galaxy evolution models in which quasar obscuration is associated with dust-enshrouded starburst galaxies.

KW - galaxies: active

KW - galaxies: starburst

KW - infrared: galaxies

KW - quasars: general

KW - X-rays: galaxies

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U2 - 10.1088/0004-637X/802/1/50

DO - 10.1088/0004-637X/802/1/50

M3 - Article

AN - SCOPUS:84925740798

SN - 0004-637X

VL - 802

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1

M1 - 50

ER -

A connection between obscuration and star formation in luminous quasars

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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