194 citations · 806 across the 25 of their papers we have counts for
25 papers · 1 filter
Scaling Relations of the Dusty Torus with Luminosity and the Broad-Line Region
Ashraf Ayubinia, Jong-Hak Woo, Shu Wang +2
We measure and compare the size of the dusty torus with active galactic nucleus (AGN) luminosity and the size of the broad-line region (BLR), using a sample of 182 AGNs with the be…
Seoul National University AGN Monitoring Project. V. Velocity-resolved H-beta Reverberation Mapping and Evidence of Kinematics Evolution
Shu Wang, Jong-Hak Woo, Aaron J. Barth +13
We present velocity-resolved reverberation lags of H-beta for 20 active galactic nuclei (AGNs) from the Seoul National University AGN Monitoring Project. We detect unambiguous velo…
Dormancy and Reawakening Over Years: Eight New Recurrent Changing-Look AGNs
Shu Wang, Jong-Hak Woo, Elena Gallo +5
We report the discovery of eight new recurrent changing-look (CL) active galactic nuclei (AGNs), including seven re-brightening turn-off AGNs and one fading turn-on AGN. These syst…
Revisiting the dust torus size-luminosity relation based on a uniform reverberation mapping analysis
Amit Kumar Mandal, Jong-Hak Woo, Shu Wang +4
We investigate the torus size -- luminosity relation of Type 1 AGNs based on the reverberation-mapping analysis using the light curves of the optical continuum and the IR continuum…
Identifying changing-look AGNs using variability characteristics
Shu Wang, Jong-Hak Woo, Elena Gallo +7
Changing-look (CL) Active Galactic Nuclei (AGNs), characterized by appearance/disappearance of broad emission lines in the span of a few years, present a challenge for the AGN unif…
The Seoul National University AGN Monitoring Project III: H lag measurements of 32 luminous AGNs and the high-luminosity end of the size--luminosity relation
Jong-Hak Woo, Shu Wang, Suvendu Rakshit +28
We present the main results from a long-term reverberation mapping campaign carried out for the Seoul National University Active Galactic Nuclei (AGN) Monitoring Project. High-qual…
Unraveling the Complex Structure of AGN-driven Outflows. VI. Strong Ionized Outflows in Type 1 AGNs and the Outflow Size-Luminosity Relation
Changseok Kim, Jong-Hak Woo, Rongxin Luo +4
We present spatially resolved gas kinematics, ionization, and energetics of 11 type 1 and 5 type 2 active galactic nuclei (AGNs) with strong ionized gas outflows at z using…
Photometric Selection of Unobscured QSOs in the Ecliptic Poles: KMTNet in the South Field and Pan-STARRS in the North Field
Woowon Byun, Minjin Kim, Yun-Kyeong Sheen +18
We search for quasi-stellar objects (QSOs) in a wide area of the south ecliptic pole (SEP) field, which has been and will continue to be intensively explored through various space…
The Seoul National University AGN Monitoring Project IV: H reverberation mapping of 6 AGNs and the H Size-Luminosity Relation
Hojin Cho, Jong-Hak Woo, Shu Wang +29
The broad line region (BLR) size-luminosity relation has paramount importance for estimating the mass of black holes in active galactic nuclei (AGNs). Traditionally, the size of th…
Investigating the Correlation of Outflow Kinematics with Radio Activity. Gas Outflows in AGNs. VII
Ashraf Ayubinia, Jong-Hak Woo, Suvendu Rakshit +1
We explore the relationship between the ionized gas outflows and radio activity using a sample of 6000 AGNs at z < 0.4 with the kinematical measurement based on the [O III]…
Determining star formation rates of active galactic nuclei host galaxies based on SED fitting with sub-mm data
Changseok Kim, Jong-Hak Woo, Yashashree Jadhav +9
We present the star formation rate (SFR) measurements based on the spectral energy distribution (SED) analysis with new sub-mm fluxes combined with archival multi-wavelength data f…
Search of Intermediate Mass Black Holes at Low Redshift with Intra-night Variability
Lael Shin, Jong-Hak Woo, Donghoon Son +4
We present a sample of intermediate-mass black hole (IMBH) candidates based on the detection of a broad H emission line and variability, which are selected from the Sloan Digita…
H Reverberation Mapping of the Intermediate-Mass Active Galactic Nucleus in NGC 4395
Hojin Cho, Jong-Hak Woo, Tommaso Treu +24
We present the results of a high-cadence spectroscopic and imaging monitoring campaign of the active galactic nucleus (AGN) of NGC 4395. High signal-to-noise-ratio spectra were obt…
Spatially Resolved Kinematics of gas and stars in hidden type 1 AGNs
Donghoon Son, Jong-Hak Woo, Da-In Eun +3
We present the spatially resolved gas and stellar kinematics of a sample of ten hidden type 1 AGNs in order to investigate the true nature of the central source and the scaling rel…
The correlation of outflow kinematics with star formation rate -- Gas outflows in AGNs. VI
Jong-Hak Woo, Donghoon Son, Suvendu Rakshit
We investigate the connection between ionized gas outflows and star formation activity using a large sample of type 1 and 2 AGNs with far-IR detections or star formation rate (SFR)…
Variability and the size-luminosity relation of the intermediate mass AGN in NGC 4395
Hojin Cho, Jong-Hak Woo, Edmund Hodges-Kluck +31
We present the variability study of the lowest-luminosity Seyfert 1 galaxy NGC 4395 based on the photometric monitoring campaigns in 2017 and 2018. Using 22 ground-based and space…
The Seoul National University AGN monitoring project. II. BLR size and black hole mass of two AGNs
Suvendu Rakshit, Jong-Hak Woo, Elena Gallo +20
Active galactic nuclei (AGNs) show a correlation between the size of the broad line region (BLR) and the monochromatic continuum luminosity at 5100 Å, allowing black hole mass esti…
Seoul National University AGN Monitoring Project. I. Strategy and Sample
J. -H. Woo, D. Son, E. Gallo +16
While the reverberation mapping technique is the best available method for measuring black hole mass in active galactic nuclei (AGN) beyond the local volume, this method has been m…
A 10,000-solar-mass black hole in the nucleus of a bulgeless dwarf galaxy
Jong-Hak Woo, Hojin Cho, Elena Gallo +5
The motions of gas and stars in the nuclei of nearby large galaxies have demonstrated that massive black holes are common and that their masses strongly correlate with the stellar…
Stability of the Broad Line Region Geometry and Dynamics in Arp 151 Over Seven Years
A. Pancoast, A. J. Barth, K. Horne +24
The Seyfert 1 galaxy Arp 151 was monitored as part of three reverberation mapping campaigns spanning . We present modeling of these velocity-resolved reverberation mappi…
Ionized Gas Kinematics along the Large-Scale Radio Jets in Type 2 AGNs
Huynh Anh N. Le, Jong-Hak Woo, Donghoon Son +4
To investigate the connection between radio activity and AGN outflows, we present a study of ionized gas kinematics based on [O III] 5007 emission line along the large-scale rad…
Delayed or no feedback? - Gas outflows in Type 2 AGNs. III
Jong-Hak Woo, Donghoon Son, Hyun-Jin Bae
We present gas kinematics based on the [OIII] 5007 line and their connection to galaxy gravitational potential, active galactic nucleus (AGN) energetics, and star formation, usi…
The Prevalence of Gas Outflows in Type 2 AGNs. II. 3D Biconical Outflow Models
Hyun-Jin Bae, Jong-Hak Woo
We present 3D models of biconical outflows combined with a thin dust plane for investigating the physical properties of the ionized gas outflows and their effect on the observed ga…
The Prevalence of Gas Outflows in Type 2 AGNs
Jong-Hak Woo, Hyun-Jin Bae, Donghoon Son +1
To constrain the nature and fraction of the ionized gas outflows in AGNs, we perform a detailed analysis on gas kinematics as manifested by the velocity dispersion and shift of the…