202 citations · 1.6k across the 27 of their papers we have counts for
28 papers
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…
The Lick AGN Monitoring Project 2016: Dynamical Modeling of Velocity-Resolved H\b{eta} Lags in Luminous Seyfert Galaxies
Lizvette Villafaña, Peter R. Williams, Tommaso Treu +62
We have modeled the velocity-resolved reverberation response of the H\b{eta} broad emission line in nine Seyfert 1 galaxies from the Lick Active Galactic Nucleus (AGN) Monitioring…
The Lick AGN Monitoring Project 2016: Velocity-Resolved Hβ Lags in Luminous Seyfert Galaxies
Vivian U, Aaron J. Barth, H. Alexander Vogler +61
We carried out spectroscopic monitoring of 21 low-redshift Seyfert 1 galaxies using the Kast double spectrograph on the 3-m Shane telescope at Lick Observatory from April 2016 to M…
Unraveling the complex structure of AGN-driven outflows: V. Integral-field spectroscopy of 40 moderate-luminosity Type-2 AGNs
Rongxin Luo, Jong-Hak Woo, Marios Karouzos +6
There is an ongoing debate on whether feedback from active galactic nuclei (AGNs) can effectively regulate the star formation activities in their host galaxies. To investigate the…
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…
NuSTAR Discovery of Dead Quasar Engine in Arp 187
Kohei Ichikawa, Taiki Kawamuro, Megumi Shidatsu +7
Recent active galactic nucleus (AGN) and quasar surveys have revealed a population showing rapid AGN luminosity variability by a factor of . Here we present the most drasti…
Positive and negative feedback of AGN outflows in NGC 5728
Jaejin Shin, Jong-Hak Woo, Aeree Chung +4
We present a spatially-resolved analysis of ionized and molecular gas in a nearby Seyfert 2 galaxy NGC 5728, using the VLT/MUSE and ALMA data. We find ionized gas outflows out to ~…
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…
Unraveling the complex structure of AGN-driven outflows: IV. Comparing AGNs with and without strong outflows
Rongxin Luo, Jong-Hak Woo, Jaejin Shin +3
AGN-driven outflows are considered as one of the processes driving the co-evolution of supermassive black holes with their host galaxies. We present integral field spectroscopy of…
Discovery of Dying Active Galactic Nucleus in Arp 187: Experience of Drastic Luminosity Decline within years
Kohei Ichikawa, Junko Ueda, Hyun-Jin Bae +4
Arp 187 is one of the fading active galactic nuclei (AGN), whose AGN activity is currently decreasing in luminosity. We investigate the observational signatures of AGN in Arp 187,…
The independence of neutral and ionized gas outflows in low-z galaxies
Hyun-Jin Bae, Jong-Hak Woo
Using a large sample of emission line galaxies selected from the Sloan Digital Sky Survey, we investigate the kinematics of the neutral gas in the interstellar medium (ISM) based o…
Ionized gas outflows in infrared-bright dust-obscured galaxies selected with WISE and SDSS
Yoshiki Toba, Hyun-Jin Bae, Tohru Nagao +5
We present the ionized gas properties of infrared (IR)-bright dust-obscured galaxies (DOGs) that show an extreme optical/IR color, , selected with the Sl…
Outflow kinematics manifested by the H-alpha line: gas outflows in Type 2 AGNs. IV
Daeun Kang, Jong-Hak Woo, Hyun-Jin Bae
Energetic ionized gas outflows driven by active galactic nuclei (AGN) have been studied as a key phenomenon related to AGN feedback. To probe the kinematics of the gas in the narro…
A systematic search for hidden type 1 AGNs: gas kinematics and scaling relations
Da-In Eun, Jong-Hak Woo, Hyun-Jin Bae
We search type 1 AGNs among emission-line galaxies, that are typically classified as type 2 AGNs based on emission line flux ratios if a broad component in the H line profile is…
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 Limited Impact of Outflows: Integral-Field Spectroscopy of 20 Local AGNs
Hyun-Jin Bae, Jong-Hak Woo, Marios Karouzos +4
To investigate AGN outflows as a tracer of AGN feedback on star-formation, we perform integral-field spectroscopy of 20 type 2 AGNs at z<0.1, which are luminous AGNs with the [O II…
Unravelling the complex structure of AGN-driven outflows: II. Photoionization and energetics
Marios Karouzos, Jong-Hak Woo, Hyun-Jin Bae
Outflows have been shown to be prevalent in galaxies hosting luminous active galactic nuclei (AGNs) and present a physically plausible way to couple the AGN energy output with the…
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…
Unravelling the complex structure of AGN-driven outflows: I. Kinematics and sizes
Marios Karouzos, Jong-Hak Woo, Hyun-Jin Bae
Outflows driven by active galactic nuclei (AGNs) are often invoked as agents of the long-sought AGN feedback. Yet, characterizing and quantifying the impact on their host galaxies…
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…
The Lick AGN Monitoring Project 2011: Spectroscopic Campaign and Emission-Line Light Curves
A. J. Barth, V. N. Bennert, G. Canalizo +27
In the Spring of 2011 we carried out a 2.5 month reverberation mapping campaign using the 3 m Shane telescope at Lick Observatory, monitoring 15 low-redshift Seyfert 1 galaxies. Th…
Misclassified type 1 AGNs in the local universe
Jong-Hak Woo, Ji-Gang Kim, Daeseong Park +5
We search for misclassified type 1 AGNs among type 2 AGNs identified with emission line flux ratios, and investigate the properties of the sample. Using 4\,113 local type 2 AGNs at…
A Census of Gas Outflows in Type 2 Active Galactic Nuclei
Hyun-Jin Bae, Jong-Hak Woo
We perform a census of ionized gas outflows using a sample of ~23,000 type 2 active galactic nuclei (AGNs) out to z~0.1. By measuring the velocity offset of narrow emission lines,…