The Astrophysical Journal (Jan 2024)
The Seoul National University AGN Monitoring Project. III. Hβ Lag Measurements of 32 Luminous Active Galactic Nuclei and the High-luminosity End of the Size–Luminosity Relation
- Jong-Hak Woo,
- Shu Wang,
- Suvendu Rakshit,
- Hojin Cho,
- Donghoon Son,
- Vardha N. Bennert,
- Elena Gallo,
- Edmund Hodges-Kluck,
- Tommaso Treu,
- Aaron J. Barth,
- Wanjin Cho,
- Adi Foord,
- Jaehyuk Geum,
- Hengxiao Guo,
- Yashashree Jadhav,
- Yiseul Jeon,
- Kyle M. Kabasares,
- Won-Suk Kang,
- Changseok Kim,
- Minjin Kim,
- Tae-Woo Kim,
- Huynh Anh N. Le,
- Matthew A. Malkan,
- Amit Kumar Mandal,
- Daeseong Park,
- Chance Spencer,
- Jaejin Shin,
- Hyun-il Sung,
- Vivian U,
- Peter R. Williams,
- Nick Yee
Affiliations
- Jong-Hak Woo
- ORCiD
- Department of Physics & Astronomy, Seoul National University , Seoul 08826, Republic of Korea ; [email protected], [email protected]
- Shu Wang
- ORCiD
- Department of Physics & Astronomy, Seoul National University , Seoul 08826, Republic of Korea ; [email protected], [email protected]
- Suvendu Rakshit
- ORCiD
- Department of Physics & Astronomy, Seoul National University , Seoul 08826, Republic of Korea ; [email protected], [email protected]; Aryabhatta Research Institute of Observational Sciences , Manora Peak, Nainital-263001, Uttarakhand, India
- Hojin Cho
- ORCiD
- Department of Physics & Astronomy, Seoul National University , Seoul 08826, Republic of Korea ; [email protected], [email protected]
- Donghoon Son
- ORCiD
- Department of Physics & Astronomy, Seoul National University , Seoul 08826, Republic of Korea ; [email protected], [email protected]
- Vardha N. Bennert
- ORCiD
- Physics Department, California Polytechnic State University , San Luis Obispo, CA 93407, USA
- Elena Gallo
- ORCiD
- Department of Astronomy, University of Michigan , Ann Arbor, MI 48109, USA
- Edmund Hodges-Kluck
- ORCiD
- Department of Astronomy, University of Michigan , Ann Arbor, MI 48109, USA; NASA/GSFC , Code 662, Greenbelt, MD 20771, USA
- Tommaso Treu
- ORCiD
- Department of Physics and Astronomy, University of California , Los Angeles, CA 90095-1547, USA
- Aaron J. Barth
- ORCiD
- Department of Physics and Astronomy, 4129 Frederick Reines Hall, University of California , Irvine, CA 92697-4575, USA
- Wanjin Cho
- ORCiD
- Department of Physics & Astronomy, Seoul National University , Seoul 08826, Republic of Korea ; [email protected], [email protected]
- Adi Foord
- ORCiD
- Kavli Institute of Particle Astrophysics and Cosmology, Stanford University , Stanford, CA 94305, USA
- Jaehyuk Geum
- Major in Astronomy and Atmospheric Sciences, Kyungpook National University , Daegu 41566, Republic of Korea
- Hengxiao Guo
- ORCiD
- Department of Physics and Astronomy, 4129 Frederick Reines Hall, University of California , Irvine, CA 92697-4575, USA; Key Laboratory for Research in Galaxies and Cosmology, Shanghai Astronomical Observatory, Chinese Academy of Sciences , 80 Nandan Road, Shanghai 200030, People's Republic of China
- Yashashree Jadhav
- Department of Physics & Astronomy, Seoul National University , Seoul 08826, Republic of Korea ; [email protected], [email protected]
- Yiseul Jeon
- Department of Physics & Astronomy, Seoul National University , Seoul 08826, Republic of Korea ; [email protected], [email protected]
- Kyle M. Kabasares
- ORCiD
- Department of Physics and Astronomy, 4129 Frederick Reines Hall, University of California , Irvine, CA 92697-4575, USA
- Won-Suk Kang
- National Youth Space Center , Goheung 59567, Republic of Korea
- Changseok Kim
- ORCiD
- Department of Physics & Astronomy, Seoul National University , Seoul 08826, Republic of Korea ; [email protected], [email protected]
- Minjin Kim
- ORCiD
- Major in Astronomy and Atmospheric Sciences, Kyungpook National University , Daegu 41566, Republic of Korea
- Tae-Woo Kim
- National Youth Space Center , Goheung 59567, Republic of Korea; Department of Astronomy and Space Science, Chungbuk National University , Cheongju 28644, Republic of Korea
- Huynh Anh N. Le
- ORCiD
- Department of Physics & Astronomy, Seoul National University , Seoul 08826, Republic of Korea ; [email protected], [email protected]; CAS Key Laboratory for Research in Galaxies and Cosmology, Department of Astronomy, University of Science and Technology of China , Hefei 230026, People's Republic of China
- Matthew A. Malkan
- ORCiD
- Department of Physics and Astronomy, University of California , Los Angeles, CA 90095-1547, USA
- Amit Kumar Mandal
- ORCiD
- Department of Physics & Astronomy, Seoul National University , Seoul 08826, Republic of Korea ; [email protected], [email protected]
- Daeseong Park
- ORCiD
- Major in Astronomy and Atmospheric Sciences, Kyungpook National University , Daegu 41566, Republic of Korea; Korea Astronomy and Space Science Institute , Daejeon 34055, Republic of Korea
- Chance Spencer
- Physics Department, California Polytechnic State University , San Luis Obispo, CA 93407, USA
- Jaejin Shin
- ORCiD
- Department of Physics & Astronomy, Seoul National University , Seoul 08826, Republic of Korea ; [email protected], [email protected]; Major in Astronomy and Atmospheric Sciences, Kyungpook National University , Daegu 41566, Republic of Korea; Korea Astronomy and Space Science Institute , Daejeon 34055, Republic of Korea
- Hyun-il Sung
- ORCiD
- Korea Astronomy and Space Science Institute , Daejeon 34055, Republic of Korea
- Vivian U
- ORCiD
- Department of Physics and Astronomy, 4129 Frederick Reines Hall, University of California , Irvine, CA 92697-4575, USA
- Peter R. Williams
- ORCiD
- Department of Physics and Astronomy, University of California , Los Angeles, CA 90095-1547, USA
- Nick Yee
- Physics Department, California Polytechnic State University , San Luis Obispo, CA 93407, USA
- DOI
- https://doi.org/10.3847/1538-4357/ad132f
- Journal volume & issue
-
Vol. 962,
no. 1
p. 67
Abstract
We present the main results from a long-term reverberation mapping campaign carried out for the Seoul National University AGN Monitoring Project (SAMP). High-quality data were obtained during 2015–2021 for 32 luminous active galactic nuclei (AGNs; i.e., continuum luminosity in the range of 10 ^44–46 erg s ^−1 ) at a regular cadence, of 20–30 days for spectroscopy and 3–5 days for photometry. We obtain time lag measurements between the variability in the H β emission and the continuum for 32 AGNs; 25 of those have the best lag measurements based on our quality assessment, examining correlation strength and the posterior lag distribution. Our study significantly increases the current sample of reverberation-mapped AGNs, particularly at the moderate-to-high-luminosity end. Combining our results with literature measurements, we derive an H β broadline region size–luminosity relation with a shallower slope than reported in the literature. For a given luminosity, most of our measured lags are shorter than the expectations, implying that single-epoch black hole mass estimators based on previous calibrations could suffer large systematic uncertainties.
Keywords
