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Exploring the link between C IV outflow kinematics and sublimation-temperature dust in quasars

Exploring the link between C IV outflow kinematics and sublimation-temperature dust in quasars
Exploring the link between C IV outflow kinematics and sublimation-temperature dust in quasars

Using data from SDSS, UKIDSS, and WISE, we investigate the properties of the high-frequency cutoff to the infrared emission in ≈5000 carefully selected luminous (Lbol ~1047) type 1 quasars. The strength of ≈2 μm emission, corresponding to emission from the hottest (T > 1200K) dust in the sublimation zone surrounding the central continuum source, is observed to correlate with the blueshift of the C iv λ1550 emission line. We therefore find that objects with stronger signatures of nuclear outflows tend to have a larger covering fraction of sublimation-temperature dust. When controlling for the observed outflow strength, the hot dust covering fraction does not vary significantly across our sample as a function of luminosity, black hole mass, or Eddington fraction. The correlation between the hot dust and the C iv line blueshifts, together with the lack of correlation between the hot dust and other parameters, therefore provides evidence of a link between the properties of the broad emission line region and the infrared-emitting dusty regions in quasars.

Galaxies: evolution, Galaxies: kinematics and dynamics, Quasars: emission lines, Quasars: general
0035-8711
3061–3073
Temple, Matthew J.
7bbe5840-3c09-445a-81f7-e090d01ff411
Banerji, Manda
ce0a04bf-70a4-4b64-9027-b1a01def7325
Hewett, Paul C.
a4763f70-9f9a-4a4e-85ed-10694a66e5c9
Rankine, Amy L.
88010438-646c-44d2-95a3-2d9ada0a07eb
Richards, Gordon T.
0192698b-f415-4a89-9ea5-cd5f74a87755
Temple, Matthew J.
7bbe5840-3c09-445a-81f7-e090d01ff411
Banerji, Manda
ce0a04bf-70a4-4b64-9027-b1a01def7325
Hewett, Paul C.
a4763f70-9f9a-4a4e-85ed-10694a66e5c9
Rankine, Amy L.
88010438-646c-44d2-95a3-2d9ada0a07eb
Richards, Gordon T.
0192698b-f415-4a89-9ea5-cd5f74a87755

Temple, Matthew J., Banerji, Manda, Hewett, Paul C., Rankine, Amy L. and Richards, Gordon T. (2021) Exploring the link between C IV outflow kinematics and sublimation-temperature dust in quasars. Monthly Notices of the Royal Astronomical Society, 501 (2), 3061–3073. (doi:10.1093/mnras/staa3842).

Record type: Article

Abstract

Using data from SDSS, UKIDSS, and WISE, we investigate the properties of the high-frequency cutoff to the infrared emission in ≈5000 carefully selected luminous (Lbol ~1047) type 1 quasars. The strength of ≈2 μm emission, corresponding to emission from the hottest (T > 1200K) dust in the sublimation zone surrounding the central continuum source, is observed to correlate with the blueshift of the C iv λ1550 emission line. We therefore find that objects with stronger signatures of nuclear outflows tend to have a larger covering fraction of sublimation-temperature dust. When controlling for the observed outflow strength, the hot dust covering fraction does not vary significantly across our sample as a function of luminosity, black hole mass, or Eddington fraction. The correlation between the hot dust and the C iv line blueshifts, together with the lack of correlation between the hot dust and other parameters, therefore provides evidence of a link between the properties of the broad emission line region and the infrared-emitting dusty regions in quasars.

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2012.01425v2 - Accepted Manuscript
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More information

Accepted/In Press date: 10 December 2020
e-pub ahead of print date: 14 December 2020
Published date: 1 February 2021
Additional Information: 11 pages, 6 figures, plus appendices. Accepted to MNRAS 10 Dec 2020
Keywords: Galaxies: evolution, Galaxies: kinematics and dynamics, Quasars: emission lines, Quasars: general

Identifiers

Local EPrints ID: 447632
URI: http://eprints.soton.ac.uk/id/eprint/447632
ISSN: 0035-8711
PURE UUID: 29875041-bfc5-49e2-91cd-408e1263a91b

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Date deposited: 17 Mar 2021 17:32
Last modified: 17 Mar 2021 17:32

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Contributors

Author: Matthew J. Temple
Author: Manda Banerji
Author: Paul C. Hewett
Author: Amy L. Rankine
Author: Gordon T. Richards

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