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Journal Articles The Astrophysical Journal Year : 2020

Dust Reverberation Mapping in Distant Quasars from Optical and Mid-infrared Imaging Surveys

Qian Yang
  • Function : Author
Yue Shen
  • Function : Author
Xin Liu
  • Function : Author
Michel Aguena
  • Function : Author
James Annis
  • Function : Author
Santiago Avila
  • Function : Author
Manda Banerji
  • Function : Author
David Brooks
  • Function : Author
David Burke
  • Function : Author
Aurelio Carnero Rosell
  • Function : Author
Matias Carrasco Kind
  • Function : Author
Luiz da Costa
  • Function : Author
Juan de Vicente
  • Function : Author
Shantanu Desai
  • Function : Author
H. Thomas Diehl
  • Function : Author
Peter Doel
  • Function : Author
Brenna Flaugher
  • Function : Author
Pablo Fosalba
  • Function : Author
Josh Frieman
  • Function : Author
Juan Garcia-Bellido
  • Function : Author
David Gerdes
  • Function : Author
Daniel Gruen
  • Function : Author
Robert Gruendl
  • Function : Author
Julia Gschwend
  • Function : Author
Gaston Gutierrez
  • Function : Author
Samuel Hinton
  • Function : Author
Devon L. Hollowood
  • Function : Author
Klaus Honscheid
  • Function : Author
Nikolay Kuropatkin
  • Function : Author
Marcio Maia
  • Function : Author
Marisa March
  • Function : Author
Jennifer Marshall
  • Function : Author
Paul Martini
  • Function : Author
Peter Melchior
  • Function : Author
Felipe Menanteau
  • Function : Author
Ramon Miquel
  • Function : Author
Francisco Paz-Chinchon
  • Function : Author
Andrés Plazas Malagón
  • Function : Author
Kathy Romer
  • Function : Author
Eusebio Sanchez
  • Function : Author
Vic Scarpine
  • Function : Author
Michael Schubnell
  • Function : Author
Santiago Serrano
  • Function : Author
Ignacio Sevilla
  • Function : Author
Mathew Smith
  • Function : Author
Eric Suchyta
  • Function : Author
Gregory Tarle
  • Function : Author
Tamas Norbert Varga
  • Function : Author
Reese Wilkinson
  • Function : Author

Abstract

The size of the dust torus in active galactic nuclei (AGNs) and their high-luminosity counterparts, quasars, can be inferred from the time delay between UV/optical accretion disk continuum variability and the response in the mid-infrared (MIR) torus emission. This dust reverberation mapping (RM) technique has been successfully applied to ∼70 z ≲ 0.3 AGNs and quasars. Here we present first results of our dust RM program for distant quasars covered in the Sloan Digital Sky Survey Stripe 82 region combining ∼20 yr ground-based optical light curves with 10 yr MIR light curves from the WISE satellite. We measure a high-fidelity lag between W1 band (3.4 μm) and g band for 587 quasars over 0.3 ≲ z ≲ 2 ( $\left\langle z\right\rangle \sim 0.8$ ) and two orders of magnitude in quasar luminosity. They tightly follow (intrinsic scatter ∼0.17 dex in lag) the IR lag-luminosity relation observed for z < 0.3 AGNs, revealing a remarkable size-luminosity relation for the dust torus over more than four decades in AGN luminosity, with little dependence on additional quasar properties such as Eddington ratio and variability amplitude. This study motivates further investigations in the utility of dust RM for cosmology and strongly endorses a compelling science case for the combined 10 yr Vera C. Rubin Observatory Legacy Survey of Space and Time (optical) and 5 yr Nancy Grace Roman Space Telescope 2 μm light curves in a deep survey for low-redshift AGN dust RM with much lower luminosities and shorter, measurable IR lags. The compiled optical and MIR light curves for 7384 quasars in our parent sample are made public with this work.

Dates and versions

insu-03748046 , version 1 (09-08-2022)

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Cite

Qian Yang, Yue Shen, Xin Liu, Michel Aguena, James Annis, et al.. Dust Reverberation Mapping in Distant Quasars from Optical and Mid-infrared Imaging Surveys. The Astrophysical Journal, 2020, 900, ⟨10.3847/1538-4357/aba59b⟩. ⟨insu-03748046⟩
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