A connection between obscuration and star formation in luminous quasars

Chien-Ting J Chen; Ryan C Hickox; Stacey Alberts; Christopher Mark Harrison; David M Alexander; Roberto J Assef; Mark Brodwin; Michael James Isles 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, Christopher Mark Harrison, David M Alexander, Roberto J Assef, Mark Brodwin, Michael James Isles 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

School of Physics and Astronomy

Research output: Contribution to journal › Article › Research › peer-review

45 Citations (Scopus)

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 Bootessurvey 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.

Original language	English
Pages (from-to)	1-15
Number of pages	15
Journal	The Astrophysical Journal
Volume	802
Issue number	1
DOIs	https://doi.org/10.1088/0004-637X/802/1/50
Publication status	Published - 2015

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. J., Brodwin, M., Brown, M. J. I., Del Moro, A., 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. The Astrophysical Journal, 802(1), 1-15. https://doi.org/10.1088/0004-637X/802/1/50

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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 Bootessurvey 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, {Christopher Mark} and Alexander, {David M} and Assef, {Roberto J} and Mark Brodwin and Brown, {Michael James Isles} and {Del Moro}, Agnese 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",

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

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Chen, C-TJ, Hickox, RC, Alberts, S, Harrison, CM, Alexander, DM, Assef, RJ, Brodwin, M, Brown, MJI, Del Moro, A, 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', The Astrophysical Journal, vol. 802, no. 1, pp. 1-15. 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, Christopher Mark

AU - Alexander, David M

AU - Assef, Roberto J

AU - Brodwin, Mark

AU - Brown, Michael James Isles

AU - Del Moro, Agnese

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

Y1 - 2015

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 Bootessurvey 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 Bootessurvey 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

UR - http://iopscience.iop.org/article/10.1088/0004-637X/802/1/50/pdf

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

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

M3 - Article

SN - 1538-4357

VL - 802

SP - 1

EP - 15

JO - The Astrophysical Journal

JF - The Astrophysical Journal

IS - 1

ER -

A connection between obscuration and star formation in luminous quasars

Abstract

Keywords

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Other files and links

What Triggers Active Galactic Nuclei?

The Growth of Galaxies: Connecting Stars, Gas & Dark Matter

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A connection between obscuration and star formation in luminous quasars

Abstract

Keywords

Access to Document

Other files and links

Projects

What Triggers Active Galactic Nuclei?

The Growth of Galaxies: Connecting Stars, Gas & Dark Matter

Cite this