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http://dx.doi.org/10.5303/JKAS.2021.54.2.37

SIMULATIONS OF TORUS REVERBERATION MAPPING EXPERIMENTS WITH SPHEREX  

Kim, Minjin (Department of Astronomy and Atmospheric Sciences, College of Natural Sciences, Kyungpook National University)
Jeong, Woong-Seob (Korea Astronomy and Space Science Institute)
Yang, Yujin (Korea Astronomy and Space Science Institute)
Son, Jiwon (Department of Astronomy and Atmospheric Sciences, College of Natural Sciences, Kyungpook National University)
Ho, Luis C. (Kavli Institute for Astronomy and Astrophysics, Peking University)
Woo, Jong-Hak (Astronomy Program, Department of Physics and Astronomy, Seoul National University)
Im, Myungshin (Astronomy Program, Department of Physics and Astronomy, Seoul National University)
Byun, Woowon (Korea Astronomy and Space Science Institute)
Publication Information
Journal of The Korean Astronomical Society / v.54, no.2, 2021 , pp. 37-47 More about this Journal
Abstract
Reverberation mapping (RM) is an efficient method to investigate the physical sizes of the broad line region (BLR) and dusty torus in an active galactic nucleus (AGN). The Spectro-Photometer for the History of the Universe, Epoch of Reionization and Ices Explorer (SPHEREx) mission will provide multi-epoch spectroscopic data at optical and near-infrared wavelengths. These data can be used for RM experiments with bright AGNs. We present results of a feasibility test using SPHEREx data in the SPHEREx deep regions for torus RM measurements. We investigate the physical properties of bright AGNs in the SPHEREx deep field. Based on this information, we compute the efficiency of detecting torus time lags in simulated light curves. We demonstrate that, in combination with complementary optical data with a depth of ~ 20 mag in B-band, lags of ≤ 750 days for tori can be measured for more than ~ 200 bright AGNs. If high signal-to-noise ratio photometric data with a depth of ~ 21-22 mag are available, RM measurements are possible for up to ~ 900 objects. When complemented by well-designed early optical observations, SPHEREx can provide a unique dataset for studies of the physical properties of dusty tori in bright AGNs.
Keywords
black hole physics; galaxies: active; galaxies: Seyfert; quasars: general; infrared: galaxies; dust; surveys;
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