455 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Seoul National UniversityKR86 papers
- Korea Astronomy and Space Science InstituteKR24 papers
- Institute for Basic ScienceKR16 papers
- Princeton UniversityUS11 papers
- Korea Institute for Advanced StudyKR8 papers
- Center for Theoretical PhysicsPL7 papers
- University of California, IrvineUS7 papers
- Yonsei UniversityKR7 papers
- Institute of Astronomy and Astrophysics, Academia SinicaTW6 papers
- Institute of Space and Astronautical ScienceJP5 papers
- Japan Aerospace Exploration AgencyJP5 papers
- Jet Propulsion LaboratoryUS5 papers
54 papers · 1 filter
The AGORA High-resolution Galaxy Simulations Comparison Project. X: Formation and Evolution of Galaxies at the High-redshift Frontier
Hyeonyong Kim, Ji-hoon Kim, Minyong Jung +22
Recent observations from JWST have revealed unexpectedly luminous galaxies, exhibiting stellar masses and luminosities significantly higher than predicted by theoretical models at…
Constraining the Low-Mass End of the Black Hole Mass Function and the Active Fraction of the Intermediate-mass Black Holes
Hojin Cho, Jong-Hak Woo
We investigate the black hole mass function (BHMF) and the Eddington ratio distribution function (ERDF), focusing on the intermediate-mass black holes (IMBHs) with masses down to $…
The AGORA High-resolution Galaxy Simulations Comparison Project. VI. Similarities and Differences in the Circumgalactic Medium
Clayton Strawn, Santi Roca-Fàbrega, Joel R. Primack +26
We analyze the circumgalactic medium (CGM) for eight commonly-used cosmological codes in the AGORA collaboration. The codes are calibrated to use identical initial conditions, cosm…
Merger Tree-based Galaxy Matching: A Comparative Study Across Different Resolutions
Minyong Jung, Ji-hoon Kim, Boon Kiat Oh +3
We introduce a novel halo/galaxy matching technique between two cosmological simulations with different resolutions, which utilizes the positions and masses of halos along their su…
Effects of Magnetic Fields on Gas Dynamics and Star Formation in Nuclear Rings
Sanghyuk Moon, Woong-Tae Kim, Chang-Goo Kim +1
Nuclear rings at the centers of barred galaxies are known to be strongly magnetized. To explore the effects of magnetic fields on star formation in these rings and nuclear gas flow…
Effects of the Central Mass Concentration on Bar Formation in Disk Galaxies
Dajeong Jang, Woong-Tae Kim
While bars are common in disk galaxies, their formation conditions are not well understood. We use -body simulations to study bar formation and evolution in isolated galaxies co…
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…
Effects of Varying Mass Inflows on Star Formation in Nuclear Rings of Barred Galaxies
Sanghyuk Moon, Woong-Tae Kim, Chang-Goo Kim +1
Observations indicate that the star formation rate (SFR) of nuclear rings varies considerably with time and is sometimes asymmetric rather than being uniform across a ring. To unde…
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…
Star Formation in Nuclear Rings with the TIGRESS Framework
Sanghyuk Moon, Woong-Tae Kim, Chang-Goo Kim +1
Nuclear rings are sites of intense star formation at the centers of barred galaxies. To understand what determines the structure and star formation rate (SFR; ) o…
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…
Radiative Supernova Remnants and Supernova Feedback
Bon-Chul Koo, Chang-Goo Kim, Sangwook Park +1
Supernova (SN) explosions are a major feedback mechanism regulating star formation in galaxies through their momentum input. We review the observations of SNRs in radiative stages…
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)…
Calibrating Mg II-based black-hole mass estimators using Low-to-High-Luminosity Active Galactic Nuclei
Huynh Anh N. Le, Jong-Hak Woo, Yongquan Xue
We present single-epoch black-hole mass (\mbh) estimators based on the rest-frame ultraviolet (UV) \MgII\ 2798Å and optical \Hb\ 4861Å emission lines. To enlarge the luminosity ran…
Local Simulations of Spiral Galaxies with the TIGRESS Framework: I. Star Formation and Arm Spurs/Feathers
Woong-Tae Kim, Chang-Goo Kim, Eve C. Ostriker
Spiral arms greatly affect gas flows and star formation in disk galaxies. We use local three-dimensional simulations of the vertically-stratified, self-gravitating, differentially-…
Gemini Multi-Object Spectrograph Integral Field Unit Spectroscopy of the Double-peaked Broad Emission Line of a Red Active Galactic Nucleus
Dohyeong Kim, Myungshin Im, Minjin Kim +1
Galaxy mergers are expected to produce multiple supermassive black holes (SMBHs) in close-separation, but the detection of such SMBHs has been difficult. 2MASS J165939.7183436 i…
Comparison of The UV and Optical Fe II Emission in Type 1 AGNs
Huynh Anh N. Le, Jong-Hak Woo
We present the kinematical properties of the UV and optical \FeII\ emission gas based on the velocity shift and line width measurements of a sample of 223 Type 1 active galactic nu…
Medium-band Photometry Reverberation Mapping of Nearby Active Galactic Nuclei
Joonho Kim, Myungshin Im, Changsu Choi +1
Reverberation mapping (RM) is one of the most efficient ways to investigate the broad-line region around the central supermassive black holes of active galactic nuclei (AGNs). A co…
High Star Formation Rates of Low Eddington Ratio Quasars at
Yongjung Kim, Myungshin Im
Recent simulation studies suggest that the supermassive black hole (SMBH) growth in the early universe may precede the prolonged intense star formation within its host galaxy, inst…
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…
Near-infrared [Fe II] and H Emission-line Study of Galactic Supernova Remnants in the First Quadrant
Yong-Hyun Lee, Bon-Chul Koo, Jae-Joon Lee +2
We report the detection of near-infrared (NIR) [Fe II] (1.644 m) and H 1-0 S(1) (2.122 m) line features associated with Galactic supernova remnants (SNRs) in the first…
Extremely Massive Quasars are not Good Proxies for Dense Environments Compared to Massive Galaxies: Environments of Extremely Massive Quasars and Galaxies
Yongmin Yoon, Myungshin Im, Minhee Hyun +4
Black hole mass scaling relations suggest that extremely massive black holes (EMBHs) with are found in the most massive galaxies with $M_\math…
Effects of Gas on Formation and Evolution of Stellar Bars and Nuclear Rings in Disk Galaxies
Woo-Young Seo, Woong-Tae Kim, SungWon Kwak +3
We run self-consistent simulations of Milky Way-sized, isolated disk galaxies to study formation and evolution of a stellar bar as well as a nuclear ring in the presence of gas. We…
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…