OzDES Reverberation Mapping Programme: Mg II lags and R-L relation

Zhefu Yu; Paul Martini; A. Penton; T. M. Davis; C. S. Kochanek; G. F. Lewis; C. Lidman; U. Malik; R. Sharp; B. E. Tucker; M. Aguena; J. Annis; E. Bertin; S. Bocquet; D. Brooks; A. Carnero Rosell; D. Carollo; M. Carrasco Kind; J. Carretero; M. Costanzi; L. N. da Costa; M. E. S. Pereira; J. De Vicente; H. T. Diehl; P. Doel; S. Everett; Ferrero; J. Garcia-Bellido; M. Gatti; D. W. Gerdes; D. Gruen; R. A. Gruendl; J. Gschwend; G. Gutierrez; S. R. Hinton; D. L. Hollowood; K. Honscheid; D. J. James; K. Kuehn; J. Mena-Fernandez; F. Menanteau; R. Miquel; B. Nichol; F. Paz-Chinchon; A. Pieres; A. A. Plazas Malagon; M. Raveri; A. K. Romer; E. Sanchez; Scarpine; Sevilla-Noarbe; M. Smith; E. Suchyta; M. E. C. Swanson; G. Tarle; M. Vincenzi; A. R. Walker; N. Weaverdyck

doi:10.1093/mnras/stad1224

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OzDES Reverberation Mapping Programme: Mg II lags and R-L relation

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OzDES Reverberation Mapping Programme: Mg II lags and R-L relation

Zhefu Yu, Paul Martini, A. Penton, T. M. Davis, C. S. Kochanek, G. F. Lewis, C. Lidman, U. Malik, R. Sharp, B. E. Tucker, …

Monthly Notices of the Royal Astronomical Society, Vol.522(3), pp.4132-4147

07/2023

DOI: https://doi.org/10.1093/mnras/stad1224

Abstract

galaxies: nuclei

quasars: general

The correlation between the broad line region radius and continuum luminosity (R-L relation) of active galactic nuclei (AGNs) is critical for single-epoch mass estimates of supermassive black holes (SMBHs). At z similar to 1-2, where AGN activity peaks, the R-L relation is constrained by the reverberation mapping (RM) lags of the Mg II line. We present 25 Mg II lags from the Australian Dark Energy Survey RM project based on 6 yr of monitoring. We define quantitative criteria to select good lag measurements and verify their reliability with simulations based on both the damped random walk stochastic model and the rescaled, resampled versions of the observed light curves of local, well-measured AGN. Our sample significantly increases the number of Mg II lags and extends the R-L relation to higher redshifts and luminosities. The relative iron line strength R-Fe has little impact on the R-L relation. The best-fitting Mg II R-L relation has a slope alpha = 0.39 +/- 0.08 with an intrinsic scatter sigma(rl) = 0.15(-0.02)(+0.03). The slope is consistent with previous measurements and shallower than the H beta R -L relation. The intrinsic scatter of the new R-L relation is substantially smaller than previous studies and comparable to the intrinsic scatter of the H beta R-L relation. Our new R-L relation will enable more precise single-epoch mass estimates and SMBH demographic studies at cosmic noon.

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Title: OzDES Reverberation Mapping Programme: Mg II lags and R-L relation
Creators: Zhefu Yu - The Ohio State University
Paul Martini - The Ohio State University
A. Penton - University of Queensland
T. M. Davis - University of Queensland
C. S. Kochanek - Ohio State Univ, Dept Astron, Columbus, OH 43210 USA
G. F. Lewis - ARC Centre of Excellence for All-sky Astrophysics
C. Lidman - Supreme Council Of Health
U. Malik - Australian National University
R. Sharp - Australian National University
B. E. Tucker - Australian National University
M. Aguena - Laboratório Interinstitucional de e-Astronomia
J. Annis - Fermi National Accelerator Laboratory
E. Bertin - Institut d'Astrophysique de Paris
S. Bocquet - Ludwig-Maximilians-Universität München
D. Brooks - University College London
A. Carnero Rosell - Laboratório Interinstitucional de e-Astronomia
D. Carollo - Sky
M. Carrasco Kind - University of Illinois at Urbana Champaign
J. Carretero - Institute for High Energy Physics
M. Costanzi - University of Trieste
L. N. da Costa - Lab Interinst & Astron LIneA, Rua Gal Jose Cristino 77, BR-20921400 Rio De Janeiro, RJ, Brazil
M. E. S. Pereira - Univ Hamburg, Hamburger Sternwarte, Gojenbergsweg 112, D-21029 D- Hamburg, Germany
J. De Vicente - Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas
H. T. Diehl - Fermi National Accelerator Laboratory
P. Doel - University College London
S. Everett - California Institute of Technology
Ferrero - University of Oslo
J. Garcia-Bellido - Universidad Autónoma de Madrid
M. Gatti - University of Pennsylvania
D. W. Gerdes - University of Michigan–Ann Arbor
D. Gruen - Menlo School
R. A. Gruendl - University of Illinois Urbana-Champaign
J. Gschwend - Laboratório Interinstitucional de e-Astronomia
G. Gutierrez - Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA
S. R. Hinton - University of Queensland
D. L. Hollowood - University of California, Santa Cruz
K. Honscheid - The Ohio State University
D. J. James - Ctr Astrophys Harvard & Smithsonian, 60 Garden St, Cambridge, MA 02138 USA
K. Kuehn - Macquarie University
J. Mena-Fernandez - Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas
F. Menanteau - Clark Art Institute
R. Miquel - Institute for High Energy Physics
B. Nichol - University of Surrey, FEPS Central Faculty Admin
F. Paz-Chinchon - University of Cambridge
A. Pieres - Laboratório Interinstitucional de e-Astronomia
A. A. Plazas Malagon - Princeton Univ, Dept Astrophys Sci, Peyton Hall, Princeton, NJ 08544 USA
M. Raveri - University of Pennsylvania
A. K. Romer - University of Sussex
E. Sanchez - Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas
Scarpine - Fermi National Accelerator Laboratory
Sevilla-Noarbe - College Station Medical Center
M. Smith - Univ Southampton, Sch Phys & Astron, Southampton SO17 1BJ, Hants, England
E. Suchyta - Oak Ridge National Laboratory
M. E. C. Swanson - Clark Art Institute
G. Tarle - University of Michigan–Ann Arbor
M. Vincenzi - University of Portsmouth
A. R. Walker - Cerro Tololo Inter-American Observatory
N. Weaverdyck - University of Michigan–Ann Arbor
Publication Details: Monthly Notices of the Royal Astronomical Society, Vol.522(3), pp.4132-4147
Publisher: Oxford University Press
Number of pages: 16
First online publication date: 27/04/2023
Publication Date: 07/2023
Date accepted for publication: 19/04/2023
Grants: Science and Technology Facilities Council (United Kingdom, Swindon) - STFC
Deutsche Forschungsgemeinschaft (Germany, Bonn) - DFG
Grant note: ZY and CSK were supported by Chandra grant GO9-20084X. PM is grateful for support from the Radcliffe Institute for Advanced Study at Harvard University. PM also acknowledges support from the United States Department of Energy, Office of High Energy Physics under award number DE-SC-0011726. CSK was supported by NSF grants AST-1908570 and AST-1814440. Parts of this research were supported by the Australian Government through the Australian Research Council Laureate Fellowship FL180100168. Funding for the DES Projects has been provided by the U.S. Department of Energy, the U.S. National Science Foundation, the Ministry of Science and Education of Spain, the Science and Technology Facilities Council of the United Kingdom, the Higher Education Funding Council for England, the National Center for Supercomputing Applications at the University of Illinois at Urbana-Champaign, the Kavli Institute of Cosmological Physics at the University of Chicago, the Center for Cosmology and Astro-Particle Physics at the Ohio State University, the Mitchell Institute for Fundamental Physics and Astronomy at Texas A&M University, Financiadora de Estudos e Projetos, Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro, Conselho Nacional de Desenvolvimento Científico e Tecnológico and the Ministério da Ciência, Tecnologia e Inovação, the Deutsche Forschungsgemeinschaft, and the Collaborating Institutions in the DES.
Identifiers: 99863184302346; WOS:000992509900029
Copyright: © 2023 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society. This article is published and distributed under the terms of the Oxford University Press, Standard Journals Publication Model (https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model)
Academic Unit: FEPS Central Faculty Admin
Language: English
Resource Type: Journal article
Data Access Statement: We present supplementary materials in the online journal: Figures of the single-epoch spectra in the same format as Fig. 2 for the final sample sources. These figures also include the co-added and rms spectra for each source. Machine-readable light curves for the final sample sources and sources that only pass one set of criteria. Figures of the light curves and lag measurements in the same format as Fig. 3 for the final sample sources. Figures of the simulated light curves based on the observed light curves of local AGN (Section 4.2). They are in the same format as Fig. 5, but for other reference AGN and input lag. The underlying DES and OzDES data are available in Abbott et al. (2021) and Lidman et al. (2020).

OzDES Reverberation Mapping Programme: Mg II lags and R-L relation

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