UV-luminous, star-forming hosts of z ∼ 2 reddened quasars in the Dark Energy Survey

C. F. Wethers; M. Banerji; P. C. Hewett; C. A. Lemon; R. G. Mcmahon; S. L. Reed; Y. Shen; F. B. Abdalla; A. Benoit-lévy; D. Brooks; E. Buckley-geer; D. Capozzi; A Carnero Rosell; M. Carrascokind; J. Carretero; C. E. Cunha; C. B. D'andrea; L. N. Da Costa; D. L. Depoy; S. Desai; P. Doel; B. Flaugher; P. Fosalba; J. Frieman; J. García-bellido; D. W. Gerdes; D. Gruen; R. A. Gruendl; J. Gschwend; G. Gutierrez; K. Honscheid; D. J. James; T. Jeltema; K. Kuehn; S. Kuhlmann; N. Kuropatkin; M. Lima; M. A. G. Maia; J. L. Marshall; P. Martini; F. Menanteau; R. Miquel; R. C. Nichol; B. Nord; A. A. Plazas; A. K. Romer; E. Sanchez; V. Scarpine; R. Schindler; M. Schubnell; I. Sevilla-noarbe; Matthew Smith; R. C. Smith; M. Soares-santos; F. Sobreira; E. Suchyta; G. Tarle; A. R. Walker

doi:10.1093/mnras/stx3332

UV-luminous, star-forming hosts of z ∼ 2 reddened quasars in the Dark Energy Survey

C. F. Wethers, M. Banerji, P. C. Hewett, C. A. Lemon, R. G. Mcmahon, S. L. Reed, Y. Shen, F. B. Abdalla, A. Benoit-lévy, D. Brooks, E. Buckley-geer, D. Capozzi, A Carnero Rosell, M. Carrascokind, J. Carretero, C. E. Cunha, C. B. D'andrea, L. N. Da Costa, D. L. Depoy, S. DesaiP. Doel, B. Flaugher, P. Fosalba, J. Frieman, J. García-bellido, D. W. Gerdes, D. Gruen, R. A. Gruendl, J. Gschwend, G. Gutierrez, K. Honscheid, D. J. James, T. Jeltema, K. Kuehn, S. Kuhlmann, N. Kuropatkin, M. Lima, M. A. G. Maia, J. L. Marshall, P. Martini, F. Menanteau, R. Miquel, R. C. Nichol, B. Nord, A. A. Plazas, A. K. Romer, E. Sanchez, V. Scarpine, R. Schindler, M. Schubnell, I. Sevilla-noarbe, Matthew Smith, R. C. Smith, M. Soares-santos, F. Sobreira, E. Suchyta, G. Tarle, A. R. Walker

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Abstract

We present the first rest-frame UV population study of 17 heavily reddened, high-luminosity [E(B − V)_QSO ≳ 0.5; L_bol > 10⁴⁶ erg s⁻¹] broad-line quasars at 1.5 < z < 2.7. We combine the first year of deep, optical, ground-based observations from the Dark Energy Survey (DES) with the near-infrared VISTA Hemisphere Survey and UKIDSS Large Area Survey data, from which the reddened quasars were initially identified. We demonstrate that the significant dust reddening towards the quasar in our sample allows host galaxy emission to be detected at the rest-frame UV wavelengths probed by the DES photometry. By exploiting this reddening effect, we disentangle the quasar emission from that of the host galaxy via spectral energy distribution fitting. We find evidence for a relatively unobscured, star-forming host galaxy in at least 10 quasars, with a further three quasars exhibiting emission consistent with either star formation or scattered light. From the rest-frame UV emission, we derive instantaneous, dust-corrected star formation rates (SFRs) in the range 25 < SFR_UV < 365 M_⊙ yr⁻¹, with an average SFR_UV = 130 ± 95 M_⊙ yr⁻¹. We find a broad correlation between SFR_UV and the bolometric quasar luminosity. Overall, our results show evidence for coeval star formation and black hole accretion occurring in luminous, reddened quasars at the peak epoch of galaxy formation.

Original language	English
Pages (from-to)	3682-3699
Journal	Monthly Notices of the Royal Astronomical Society
Volume	475
Issue number	3
Early online date	5 Jan 2018
DOIs	https://doi.org/10.1093/mnras/stx3332
Publication status	Published - 11 Apr 2018

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RCUK
STFC

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10.1093/mnras/stx3332

UV-luminous, star-forming hosts
This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2018 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
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https://academic.oup.com/mnras/article/475/3/3682/4791576

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Wethers, C. F., Banerji, M., Hewett, P. C., Lemon, C. A., Mcmahon, R. G., Reed, S. L., Shen, Y., Abdalla, F. B., Benoit-lévy, A., Brooks, D., Buckley-geer, E., Capozzi, D., Carnero Rosell, A., Carrascokind, M., Carretero, J., Cunha, C. E., D'andrea, C. B., Da Costa, L. N., Depoy, D. L., ... Walker, A. R. (2018). UV-luminous, star-forming hosts of z ∼ 2 reddened quasars in the Dark Energy Survey. Monthly Notices of the Royal Astronomical Society, 475(3), 3682-3699. https://doi.org/10.1093/mnras/stx3332

@article{bd163fa002ba445a83e8540987d0cd50,

title = "UV-luminous, star-forming hosts of z ∼ 2 reddened quasars in the Dark Energy Survey",

abstract = "We present the first rest-frame UV population study of 17 heavily reddened, high-luminosity [E(B − V)QSO ≳ 0.5; Lbol > 1046 erg s−1] broad-line quasars at 1.5 < z < 2.7. We combine the first year of deep, optical, ground-based observations from the Dark Energy Survey (DES) with the near-infrared VISTA Hemisphere Survey and UKIDSS Large Area Survey data, from which the reddened quasars were initially identified. We demonstrate that the significant dust reddening towards the quasar in our sample allows host galaxy emission to be detected at the rest-frame UV wavelengths probed by the DES photometry. By exploiting this reddening effect, we disentangle the quasar emission from that of the host galaxy via spectral energy distribution fitting. We find evidence for a relatively unobscured, star-forming host galaxy in at least 10 quasars, with a further three quasars exhibiting emission consistent with either star formation or scattered light. From the rest-frame UV emission, we derive instantaneous, dust-corrected star formation rates (SFRs) in the range 25 < SFRUV < 365 M⊙ yr−1, with an average SFRUV = 130 ± 95 M⊙ yr−1. We find a broad correlation between SFRUV and the bolometric quasar luminosity. Overall, our results show evidence for coeval star formation and black hole accretion occurring in luminous, reddened quasars at the peak epoch of galaxy formation.",

keywords = "RCUK, STFC",

author = "Wethers, {C. F.} and M. Banerji and Hewett, {P. C.} and Lemon, {C. A.} and Mcmahon, {R. G.} and Reed, {S. L.} and Y. Shen and Abdalla, {F. B.} and A. Benoit-l{\'e}vy and D. Brooks and E. Buckley-geer and D. Capozzi and {Carnero Rosell}, A and M. Carrascokind and J. Carretero and Cunha, {C. E.} and D'andrea, {C. B.} and {Da Costa}, {L. N.} and Depoy, {D. L.} and S. Desai and P. Doel and B. Flaugher and P. Fosalba and J. Frieman and J. Garc{\'i}a-bellido and Gerdes, {D. W.} and D. Gruen and Gruendl, {R. A.} and J. Gschwend and G. Gutierrez and K. Honscheid and James, {D. J.} and T. Jeltema and K. Kuehn and S. Kuhlmann and N. Kuropatkin and M. Lima and Maia, {M. A. G.} and Marshall, {J. L.} and P. Martini and F. Menanteau and R. Miquel and Nichol, {R. C.} and B. Nord and Plazas, {A. A.} and Romer, {A. K.} and E. Sanchez and V. Scarpine and R. Schindler and M. Schubnell and I. Sevilla-noarbe and Matthew Smith and Smith, {R. C.} and M. Soares-santos and F. Sobreira and E. Suchyta and G. Tarle and Walker, {A. R.}",

year = "2018",

month = apr,

day = "11",

doi = "10.1093/mnras/stx3332",

language = "English",

volume = "475",

pages = "3682--3699",

journal = "Monthly Notices of the Royal Astronomical Society",

issn = "0035-8711",

publisher = "Oxford University Press",

number = "3",

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Wethers, CF, Banerji, M, Hewett, PC, Lemon, CA, Mcmahon, RG, Reed, SL, Shen, Y, Abdalla, FB, Benoit-lévy, A, Brooks, D, Buckley-geer, E, Capozzi, D, Carnero Rosell, A, Carrascokind, M, Carretero, J, Cunha, CE, D'andrea, CB, Da Costa, LN, Depoy, DL, Desai, S, Doel, P, Flaugher, B, Fosalba, P, Frieman, J, García-bellido, J, Gerdes, DW, Gruen, D, Gruendl, RA, Gschwend, J, Gutierrez, G, Honscheid, K, James, DJ, Jeltema, T, Kuehn, K, Kuhlmann, S, Kuropatkin, N, Lima, M, Maia, MAG, Marshall, JL, Martini, P, Menanteau, F, Miquel, R, Nichol, RC, Nord, B, Plazas, AA, Romer, AK, Sanchez, E, Scarpine, V, Schindler, R, Schubnell, M, Sevilla-noarbe, I, Smith, M, Smith, RC, Soares-santos, M, Sobreira, F, Suchyta, E, Tarle, G & Walker, AR 2018, 'UV-luminous, star-forming hosts of z ∼ 2 reddened quasars in the Dark Energy Survey', Monthly Notices of the Royal Astronomical Society, vol. 475, no. 3, pp. 3682-3699. https://doi.org/10.1093/mnras/stx3332

TY - JOUR

T1 - UV-luminous, star-forming hosts of z ∼ 2 reddened quasars in the Dark Energy Survey

AU - Wethers, C. F.

AU - Banerji, M.

AU - Hewett, P. C.

AU - Lemon, C. A.

AU - Mcmahon, R. G.

AU - Reed, S. L.

AU - Shen, Y.

AU - Abdalla, F. B.

AU - Benoit-lévy, A.

AU - Brooks, D.

AU - Buckley-geer, E.

AU - Capozzi, D.

AU - Carnero Rosell, A

AU - Carrascokind, M.

AU - Carretero, J.

AU - Cunha, C. E.

AU - D'andrea, C. B.

AU - Da Costa, L. N.

AU - Depoy, D. L.

AU - Desai, S.

AU - Doel, P.

AU - Flaugher, B.

AU - Fosalba, P.

AU - Frieman, J.

AU - García-bellido, J.

AU - Gerdes, D. W.

AU - Gruen, D.

AU - Gruendl, R. A.

AU - Gschwend, J.

AU - Gutierrez, G.

AU - Honscheid, K.

AU - James, D. J.

AU - Jeltema, T.

AU - Kuehn, K.

AU - Kuhlmann, S.

AU - Kuropatkin, N.

AU - Lima, M.

AU - Maia, M. A. G.

AU - Marshall, J. L.

AU - Martini, P.

AU - Menanteau, F.

AU - Miquel, R.

AU - Nichol, R. C.

AU - Nord, B.

AU - Plazas, A. A.

AU - Romer, A. K.

AU - Sanchez, E.

AU - Scarpine, V.

AU - Schindler, R.

AU - Schubnell, M.

AU - Sevilla-noarbe, I.

AU - Smith, Matthew

AU - Smith, R. C.

AU - Soares-santos, M.

AU - Sobreira, F.

AU - Suchyta, E.

AU - Tarle, G.

AU - Walker, A. R.

PY - 2018/4/11

Y1 - 2018/4/11

N2 - We present the first rest-frame UV population study of 17 heavily reddened, high-luminosity [E(B − V)QSO ≳ 0.5; Lbol > 1046 erg s−1] broad-line quasars at 1.5 < z < 2.7. We combine the first year of deep, optical, ground-based observations from the Dark Energy Survey (DES) with the near-infrared VISTA Hemisphere Survey and UKIDSS Large Area Survey data, from which the reddened quasars were initially identified. We demonstrate that the significant dust reddening towards the quasar in our sample allows host galaxy emission to be detected at the rest-frame UV wavelengths probed by the DES photometry. By exploiting this reddening effect, we disentangle the quasar emission from that of the host galaxy via spectral energy distribution fitting. We find evidence for a relatively unobscured, star-forming host galaxy in at least 10 quasars, with a further three quasars exhibiting emission consistent with either star formation or scattered light. From the rest-frame UV emission, we derive instantaneous, dust-corrected star formation rates (SFRs) in the range 25 < SFRUV < 365 M⊙ yr−1, with an average SFRUV = 130 ± 95 M⊙ yr−1. We find a broad correlation between SFRUV and the bolometric quasar luminosity. Overall, our results show evidence for coeval star formation and black hole accretion occurring in luminous, reddened quasars at the peak epoch of galaxy formation.

AB - We present the first rest-frame UV population study of 17 heavily reddened, high-luminosity [E(B − V)QSO ≳ 0.5; Lbol > 1046 erg s−1] broad-line quasars at 1.5 < z < 2.7. We combine the first year of deep, optical, ground-based observations from the Dark Energy Survey (DES) with the near-infrared VISTA Hemisphere Survey and UKIDSS Large Area Survey data, from which the reddened quasars were initially identified. We demonstrate that the significant dust reddening towards the quasar in our sample allows host galaxy emission to be detected at the rest-frame UV wavelengths probed by the DES photometry. By exploiting this reddening effect, we disentangle the quasar emission from that of the host galaxy via spectral energy distribution fitting. We find evidence for a relatively unobscured, star-forming host galaxy in at least 10 quasars, with a further three quasars exhibiting emission consistent with either star formation or scattered light. From the rest-frame UV emission, we derive instantaneous, dust-corrected star formation rates (SFRs) in the range 25 < SFRUV < 365 M⊙ yr−1, with an average SFRUV = 130 ± 95 M⊙ yr−1. We find a broad correlation between SFRUV and the bolometric quasar luminosity. Overall, our results show evidence for coeval star formation and black hole accretion occurring in luminous, reddened quasars at the peak epoch of galaxy formation.

KW - RCUK

KW - STFC

U2 - 10.1093/mnras/stx3332

DO - 10.1093/mnras/stx3332

M3 - Article

SN - 0035-8711

VL - 475

SP - 3682

EP - 3699

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 3

ER -

UV-luminous, star-forming hosts of z ∼ 2 reddened quasars in the Dark Energy Survey

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