TY - JOUR
T1 - The Sloan Digital Sky Survey Reverberation Mapping project
T2 - key results
AU - Shen, Yue
AU - Grier, Catherine J.
AU - Horne, Keith
AU - Stone, Zachary
AU - Li, Jennifer I.
AU - Yang, Qian
AU - Homayouni, Yasaman
AU - Trump, Jonathan R.
AU - Anderson, Scott F.
AU - Brandt, W. N.
AU - Hall, Patrick B.
AU - Ho, Luis C.
AU - Jiang, Linhua
AU - Petitjean, Patrick
AU - Schneider, Donald P.
AU - Tao, Charling
AU - Donnan, Fergus. R.
AU - AlSayyad, Yusra
AU - Bershady, Matthew A.
AU - Blanton, Michael R.
AU - Bizyaev, Dmitry
AU - Bundy, Kevin
AU - Chen, Yuguang
AU - Davis, Megan C.
AU - Dawson, Kyle
AU - Fan, Xiaohui
AU - Greene, Jenny E.
AU - Gröller, Hannes
AU - Guo, Yucheng
AU - Ibarra-Medel, Héctor
AU - Jiang, Yuanzhe
AU - Keenan, Ryan P.
AU - Kollmeier, Juna A.
AU - Lejoly, Cassandra
AU - Li, Zefeng
AU - de la Macorra, Axel
AU - Moe, Maxwell
AU - Nie, Jundan
AU - Rossi, Graziano
AU - Smith, Paul S.
AU - Tee, Wei Leong
AU - Weijmans, Anne-Marie
AU - Xu, Jiachuan
AU - Yue, Minghao
AU - Zhou, Xu
AU - Zhou, Zhimin
AU - Zou, Hu
N1 - Funding: Y.S. acknowledges support from NSF grants AST-1715579 and AST-2009947. C.J.G. acknowledges support from NSF grants AST-2009949 and AST-2108667. J.I.L. is supported by the Eric and Wendy Schmidt AI in Science Postdoctoral Fellowship, a Schmidt Futures program. Y.H. was supported as an Eberly Research Fellow by the Eberly College of Science at the Pennsylvania State University. J.R.T. acknowledges support from NSF grants CAREER-1945546, AST-2009539, and AST-2108668. W.N.B. acknowledges support from NSF grant AST-2106990 and the Eberly Endowment at Penn State. L.C.H. was supported by the National Science Foundation of China (11721303, 11991052, 12011540375, 12233001) and the China Manned Space Project (CMS-CSST-2021-A04, CMS-CSST-2021-A06). C.T. acknowledges Tsinghua University for the support to her work.
PY - 2024/6
Y1 - 2024/6
N2 - We present the final data from the Sloan Digital Sky Survey (SDSS) Reverberation Mapping (RM) project, a precursor to the SDSS-V Black Hole Mapper RM program. This data set includes 11 yr photometric and 7 yr spectroscopic light curves for 849 broad-line quasars over a redshift range of 0.1 < z < 4.5 and a luminosity range of Lbol = 1044−47.5 erg s−1, along with spectral and variability measurements. We report 23, 81, 125, and 110 RM lags (relative to optical continuum variability) for broad Hα, Hβ, Mg ii, and C iv using the SDSS-RM sample, spanning much of the luminosity and redshift ranges of the sample. Using 30 low-redshift RM active galactic nuclei with dynamical-modeling black hole masses, we derive a new estimate of the average virial factor of ⟨logf⟩ = 0.62±0.07 for the line dispersion measured from the rms spectrum. The intrinsic scatter of individual virial factors is 0.31 ± 0.07 dex, indicating a factor of 2 systematic uncertainty in RM black hole masses. Our lag measurements reveal significant R–L relations for Hβ and Mg ii at high redshift, consistent with the latest measurements based on heterogeneous samples. While we are unable to robustly constrain the slope of the R–L relation for C iv given the limited dynamic range in luminosity, we found substantially larger scatter in C iv lags at fixed L1350. Using the SDSS-RM lag sample, we derive improved single-epoch (SE) mass recipes for Hβ, Mg ii, and C iv, which are consistent with their respective RM masses as well as between the SE recipes from two different lines, over the luminosity range probed by our sample. The new Hβ and Mg ii recipes are approximately unbiased estimators at given RM masses, but there are systematic biases in the C iv recipe. The intrinsic scatter of SE masses around RM masses is ∼0.45 dex for Hβ and Mg ii, increasing to ∼0.58 dex for C iv.
AB - We present the final data from the Sloan Digital Sky Survey (SDSS) Reverberation Mapping (RM) project, a precursor to the SDSS-V Black Hole Mapper RM program. This data set includes 11 yr photometric and 7 yr spectroscopic light curves for 849 broad-line quasars over a redshift range of 0.1 < z < 4.5 and a luminosity range of Lbol = 1044−47.5 erg s−1, along with spectral and variability measurements. We report 23, 81, 125, and 110 RM lags (relative to optical continuum variability) for broad Hα, Hβ, Mg ii, and C iv using the SDSS-RM sample, spanning much of the luminosity and redshift ranges of the sample. Using 30 low-redshift RM active galactic nuclei with dynamical-modeling black hole masses, we derive a new estimate of the average virial factor of ⟨logf⟩ = 0.62±0.07 for the line dispersion measured from the rms spectrum. The intrinsic scatter of individual virial factors is 0.31 ± 0.07 dex, indicating a factor of 2 systematic uncertainty in RM black hole masses. Our lag measurements reveal significant R–L relations for Hβ and Mg ii at high redshift, consistent with the latest measurements based on heterogeneous samples. While we are unable to robustly constrain the slope of the R–L relation for C iv given the limited dynamic range in luminosity, we found substantially larger scatter in C iv lags at fixed L1350. Using the SDSS-RM lag sample, we derive improved single-epoch (SE) mass recipes for Hβ, Mg ii, and C iv, which are consistent with their respective RM masses as well as between the SE recipes from two different lines, over the luminosity range probed by our sample. The new Hβ and Mg ii recipes are approximately unbiased estimators at given RM masses, but there are systematic biases in the C iv recipe. The intrinsic scatter of SE masses around RM masses is ∼0.45 dex for Hβ and Mg ii, increasing to ∼0.58 dex for C iv.
KW - Quasars
KW - Reverberation mapping
KW - Surveys
U2 - 10.3847/1538-4365/ad3936
DO - 10.3847/1538-4365/ad3936
M3 - Article
SN - 0067-0049
VL - 272
JO - Astrophysical Journal Supplement Series
JF - Astrophysical Journal Supplement Series
IS - 2
M1 - 26
ER -