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

Yang, Qian; Shen, Yue; Liu, Xin; Aguena, Michel; Annis, James; Avila, Santiago; Banerji, Manda; Bertin, Emmanuel; Brooks, David; Burke, David; Rosell, Aurelio Carnero; Kind, Matias Carrasco; da Costa, Luiz; De Vicente, Juan; Desai, Shantanu; Diehl, H. Thomas; Doel, Peter; Flaugher, Brenna; Fosalba, Pablo; Frieman, Josh; Garcia-Bellido, Juan; Gerdes, David; Gruen, Daniel; Gruendl, Robert; Gschwend, Julia; Gutierrez, Gaston; Hinton, Samuel; Hollowood, Devon L.; Honscheid, Klaus; Kuropatkin, Nikolay; Maia, Marcio; March, Marisa; Marshall, Jennifer; Martini, Paul; Melchior, Peter; Menanteau, Felipe; Miquel, Ramon; Paz-Chinchon, Francisco; Malagon, Andres Plazas; Romer, Kathy; Sanchez, Eusebio; Scarpine, V.ic; Schubnell, Michael; Serrano, Santiago; Sevilla, Ignacio; Smith, Mathew; Suchyta, Eric; Tarle, Gregory; Varga, Tamas Norbert und Wilkinson, Reese (2020): Dust Reverberation Mapping in Distant Quasars from Optical and Mid-infrared Imaging Surveys. In: Astrophysical Journal, Bd. 900, Nr. 1, 58

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 similar to 70z less than or similar to 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 similar to 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 mu m) andgband for 587 quasars over 0.3 less than or similar to z less than or similar to 2 (< z >) and two orders of magnitude in quasar luminosity. They tightly follow (intrinsic scatter similar to 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 mu m 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.

• Dokumententyp: Zeitschriftenartikel
• Fakultät: Physik
• Themengebiete: 500 Naturwissenschaften und Mathematik > 530 Physik
• ISSN: 0004-637X
• Sprache: Englisch