OzDES Reverberation Mapping Programme: the first Mg  ii lags from 5 yr of monitoring

Yu, Zhefu; Martini, Paul; Penton, A.; Davis, T. M.; Malik, U.; Lidman, C.; Tucker, B. E.; Sharp, R.; Kochanek, C. S.; Peterson, B. M.; Aguena, M.; Allam, S.; Andrade-Oliveira, F.; Annis, J.; Asorey, J.; Bertin, E.; Brooks, D.; Burke, D. L.; Calcino, J.; Carnero Rosell, A.; Carollo, D.; Carrasco Kind, M.; Costanzi, M.; da Costa, L. N.; da Silva Pereira, M. E. S.; Diehl, H. T.; Everett, S.; Ferrero, I.; Flaugher, B.; Frieman, J.; García-Bellido, J.; Gaztanaga, E.; Gerdes, D. W.; Gruen, D.; Gruendl, R. A.; Gschwend, J.; Gutierrez, G.; Hinton, S. R.; Hollowood, D. L.; James, D. J.; Kim, A. G.; Kron, R.; Kuehn, K.; Kuropatkin, N.; Lewis, G. F.; Maia, M. A. G.; March, M.; Marshall, J. L.; Menanteau, F.; Miquel, R.; Morgan, R.; Möller, A.; Palmese, A.; Paz-Chinchón, F.; Plazas, A. A.; Sanchez, E.; Scarpine, V.; Serrano, S.; Sevilla-Noarbe, I.; Smith, M.; Soares-Santos, M.; Suchyta, E.; Tarle, G.; Thomas, D.; To, C.; Tucker, D. L.

doi:10.1093/mnras/stab2244

Title: OzDES Reverberation Mapping Programme: the first Mg ii lags from 5 yr of monitoring

Journal Article · 04 August 2021 · Monthly Notices of the Royal Astronomical Society

DOI: https://doi.org/10.1093/mnras/stab2244 · OSTI ID:1819377

; Martini, Paul;

;

; Malik, U.;

; Tucker, B. E.; Sharp, R.;

; Peterson, B. M.;

; Allam, S.; Andrade-Oliveira, F.; Annis, J.;

;

; Brooks, D.; Burke, D. L.; Calcino, J.;

ABSTRACT Reverberation mapping is a robust method to measure the masses of supermassive black holes outside of the local Universe. Measurements of the radius–luminosity (R−L) relation using the Mg ii emission line are critical for determining these masses near the peak of quasar activity at z ≈ 1−2, and for calibrating secondary mass estimators based on Mg ii that can be applied to large samples with only single-epoch spectroscopy. We present the first nine Mg ii lags from our 5-yr Australian Dark Energy Survey reverberation mapping programme, which substantially improves the number and quality of Mg ii lag measurements. As the Mg ii feature is somewhat blended with iron emission, we model and subtract both the continuum and iron contamination from the multiepoch spectra before analysing the Mg ii line. We also develop a new method of quantifying correlated spectroscopic calibration errors based on our numerous, contemporaneous observations of F-stars. The lag measurements for seven of our nine sources are consistent with both the H β and Mg ii R−L relations reported by previous studies. Our simulations verify the lag reliability of our nine measurements, and we estimate that the median false positive rate of the lag measurements is $$4{{\ \rm per\ cent}}$$.

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Research Organization:: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: National Science Foundation (NSF); USDOE Office of Science (SC), High Energy Physics (HEP)

Grant/Contract Number:: AC02-07CH11359; AC05-00OR22725; SC0011726

OSTI ID:: 1819377

Report Number(s):: DES--2020-0631; FERMILAB-PUB-21-027-AE; arXiv:2103.01973

Journal Information:: Monthly Notices of the Royal Astronomical Society, Journal Name: Monthly Notices of the Royal Astronomical Society Journal Issue: 3 Vol. 507; ISSN 0035-8711

Publisher:: Oxford University PressCopyright Statement

Country of Publication:: United Kingdom

Language:: English

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