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; I. Ferrero; J. García-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-Fernández; F. Menanteau; R. Miquel; B. Nichol; F. Paz-Chinchón; A. Pieres; A. A.Plazas Malagón; M. Raveri; A. K. Romer; E. Sanchez; V. Scarpine; I. Sevilla-Noarbe; M. Smith; E. Suchyta; M. E.C. Swanson; G. Tarle; M. Vincenzi; A. R. Walker; N. Weaverdyck

doi:10.1093/mnras/stad1224

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. CostanziL. N. da Costa, M. E.S. Pereira, J. De Vicente, H. T. Diehl, P. Doel, S. Everett, I. Ferrero, J. García-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-Fernández, F. Menanteau, R. Miquel, B. Nichol, F. Paz-Chinchón, A. Pieres, A. A.Plazas Malagón, M. Raveri, A. K. Romer, E. Sanchez, V. Scarpine, I. Sevilla-Noarbe, M. Smith, E. Suchyta, M. E.C. Swanson, G. Tarle, M. Vincenzi, A. R. Walker, N. Weaverdyck

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Abstract

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 ∼ 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 α = 0.39 ± 0.08 with an intrinsic scatter σ_rl = 0.15⁺₋₀⁰₀₂⁰³. The slope is consistent with previous measurements and shallower than the H β 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 β R-L relation. Our new R-L relation will enable more precise single-epoch mass estimates and SMBH demographic studies at cosmic noon.

Original language	English
Pages (from-to)	4132-4147
Number of pages	16
Journal	Monthly Notices of the Royal Astronomical Society
Volume	522
Issue number	3
DOIs	https://doi.org/10.1093/mnras/stad1224
State	Published - Jul 1 2023

Keywords

galaxies: nuclei - quasars: general

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10.1093/mnras/stad1224

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Yu, Z., Martini, P., Penton, A., Davis, T. M., Kochanek, C. S., Lewis, G. F., Lidman, C., Malik, U., Sharp, R., Tucker, B. E., Aguena, M., Annis, J., Bertin, E., Bocquet, S., Brooks, D., Rosell, A. C., Carollo, D., Kind, M. C., Carretero, J., ... Weaverdyck, N. (2023). OzDES Reverberation Mapping Programme: Mg II lags and R−L relation. Monthly Notices of the Royal Astronomical Society, 522(3), 4132-4147. https://doi.org/10.1093/mnras/stad1224

@article{a2928d95435f4e7a94257a8fc429bf8e,

title = "OzDES Reverberation Mapping Programme: Mg II lags and R−L relation",

abstract = "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 ∼ 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 RFe has little impact on the R-L relation. The best-fitting Mg II R-L relation has a slope α = 0.39 ± 0.08 with an intrinsic scatter σrl = 0.15+−000203. The slope is consistent with previous measurements and shallower than the H β 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 β R-L relation. Our new R-L relation will enable more precise single-epoch mass estimates and SMBH demographic studies at cosmic noon.",

keywords = "galaxies: nuclei - quasars: general",

author = "Zhefu Yu and Paul Martini and A. Penton and Davis, {T. M.} and Kochanek, {C. S.} and Lewis, {G. F.} and C. Lidman and U. Malik and R. Sharp and Tucker, {B. E.} and M. Aguena and J. Annis and E. Bertin and S. Bocquet and D. Brooks and Rosell, {A. Carnero} and D. Carollo and Kind, {M. Carrasco} and J. Carretero and M. Costanzi and {da Costa}, {L. N.} and Pereira, {M. E.S.} and {De Vicente}, J. and Diehl, {H. T.} and P. Doel and S. Everett and I. Ferrero and J. Garc{\'i}a-Bellido and M. Gatti and Gerdes, {D. W.} and D. Gruen and Gruendl, {R. A.} and J. Gschwend and G. Gutierrez and Hinton, {S. R.} and Hollowood, {D. L.} and K. Honscheid and James, {D. J.} and K. Kuehn and J. Mena-Fern{\'a}ndez and F. Menanteau and R. Miquel and B. Nichol and F. Paz-Chinch{\'o}n and A. Pieres and Malag{\'o}n, {A. A.Plazas} and M. Raveri and Romer, {A. K.} and E. Sanchez and V. Scarpine and I. Sevilla-Noarbe and M. Smith and E. Suchyta and Swanson, {M. E.C.} and G. Tarle and M. Vincenzi and Walker, {A. R.} and N. Weaverdyck",

note = "Publisher Copyright: {\textcopyright} 2023 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society.",

year = "2023",

month = jul,

day = "1",

doi = "10.1093/mnras/stad1224",

language = "English",

volume = "522",

pages = "4132--4147",

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

issn = "0035-8711",

publisher = "Oxford University Press",

number = "3",

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Yu, Z, Martini, P, Penton, A, Davis, TM, Kochanek, CS, Lewis, GF, Lidman, C, Malik, U, Sharp, R, Tucker, BE, Aguena, M, Annis, J, Bertin, E, Bocquet, S, Brooks, D, Rosell, AC, Carollo, D, Kind, MC, Carretero, J, Costanzi, M, da Costa, LN, Pereira, MES, De Vicente, J, Diehl, HT, Doel, P, Everett, S, Ferrero, I, García-Bellido, J, Gatti, M, Gerdes, DW, Gruen, D, Gruendl, RA, Gschwend, J, Gutierrez, G, Hinton, SR, Hollowood, DL, Honscheid, K, James, DJ, Kuehn, K, Mena-Fernández, J, Menanteau, F, Miquel, R, Nichol, B, Paz-Chinchón, F, Pieres, A, Malagón, AAP, Raveri, M, Romer, AK, Sanchez, E, Scarpine, V, Sevilla-Noarbe, I, Smith, M, Suchyta, E, Swanson, MEC, Tarle, G, Vincenzi, M, Walker, AR & Weaverdyck, N 2023, 'OzDES Reverberation Mapping Programme: Mg II lags and R−L relation', Monthly Notices of the Royal Astronomical Society, vol. 522, no. 3, pp. 4132-4147. https://doi.org/10.1093/mnras/stad1224

TY - JOUR

T1 - OzDES Reverberation Mapping Programme

T2 - Mg II lags and R−L relation

AU - Yu, Zhefu

AU - Martini, Paul

AU - Penton, A.

AU - Davis, T. M.

AU - Kochanek, C. S.

AU - Lewis, G. F.

AU - Lidman, C.

AU - Malik, U.

AU - Sharp, R.

AU - Tucker, B. E.

AU - Aguena, M.

AU - Annis, J.

AU - Bertin, E.

AU - Bocquet, S.

AU - Brooks, D.

AU - Rosell, A. Carnero

AU - Carollo, D.

AU - Kind, M. Carrasco

AU - Carretero, J.

AU - Costanzi, M.

AU - da Costa, L. N.

AU - Pereira, M. E.S.

AU - De Vicente, J.

AU - Diehl, H. T.

AU - Doel, P.

AU - Everett, S.

AU - Ferrero, I.

AU - García-Bellido, J.

AU - Gatti, M.

AU - Gerdes, D. W.

AU - Gruen, D.

AU - Gruendl, R. A.

AU - Gschwend, J.

AU - Gutierrez, G.

AU - Hinton, S. R.

AU - Hollowood, D. L.

AU - Honscheid, K.

AU - James, D. J.

AU - Kuehn, K.

AU - Mena-Fernández, J.

AU - Menanteau, F.

AU - Miquel, R.

AU - Nichol, B.

AU - Paz-Chinchón, F.

AU - Pieres, A.

AU - Malagón, A. A.Plazas

AU - Raveri, M.

AU - Romer, A. K.

AU - Sanchez, E.

AU - Scarpine, V.

AU - Sevilla-Noarbe, I.

AU - Smith, M.

AU - Suchyta, E.

AU - Swanson, M. E.C.

AU - Tarle, G.

AU - Vincenzi, M.

AU - Walker, A. R.

AU - Weaverdyck, N.

PY - 2023/7/1

Y1 - 2023/7/1

N2 - 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 ∼ 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 RFe has little impact on the R-L relation. The best-fitting Mg II R-L relation has a slope α = 0.39 ± 0.08 with an intrinsic scatter σrl = 0.15+−000203. The slope is consistent with previous measurements and shallower than the H β 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 β R-L relation. Our new R-L relation will enable more precise single-epoch mass estimates and SMBH demographic studies at cosmic noon.

AB - 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 ∼ 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 RFe has little impact on the R-L relation. The best-fitting Mg II R-L relation has a slope α = 0.39 ± 0.08 with an intrinsic scatter σrl = 0.15+−000203. The slope is consistent with previous measurements and shallower than the H β 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 β R-L relation. Our new R-L relation will enable more precise single-epoch mass estimates and SMBH demographic studies at cosmic noon.

KW - galaxies: nuclei - quasars: general

UR - http://www.scopus.com/inward/record.url?scp=85159858982&partnerID=8YFLogxK

U2 - 10.1093/mnras/stad1224

DO - 10.1093/mnras/stad1224

M3 - Article

AN - SCOPUS:85159858982

SN - 0035-8711

VL - 522

SP - 4132

EP - 4147

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 3

ER -

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

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