50 citations · 578 across the 33 of their papers we have counts for
33 papers
BCG alignment with the Locations of Cluster Members and the Large Scale Structure out to 10 R
Rory Smith, Ho Seong Hwang, Katarina Kraljic +8
Using a sample of clusters, each with typically spectroscopically confirmed cluster members, we search for a signal of alignment between the Position Angle (PA) of…
Galaxy Quenching with Mass Growth History of Galaxy Groups and Clusters: The Importance of Post-Processing
So-Myoung Park, Kyungwon Chun, Jihye Shin +5
We investigate the fraction of quenched satellite galaxies in host galaxy groups and clusters using TNG300 in the IllustrisTNG cosmological magnetohydrodynamical simulations. Simul…
Star formation history of mass-selected galaxies in the ELAIS-N1 Field
E. F. Ocran, M. Vaccari, J. M. Stil +3
We measure the specific star formation rates of \textit{K}-band selected galaxies from the ELAIS-N1 by stacking GMRT data at 610 MHz. We identify a sample of SFGs, spanning $\rm{0.…
Impact of Galaxy Mergers on Stellar Population Profiles of Early-type Galaxies
Yongmin Yoon, Jongwan Ko, Jae-Woo Kim
We study the impact of galaxy mergers on stellar population profiles/gradients of early-type galaxies (ETGs) using ETGs at in the Stripe 82 region of the Sloan Digital Sk…
Performance Assessment of the KASI-Deep Rolling Imaging Fast-optics Telescope pathfinder
Woowon Byun, Jongwan Ko, Yunjong Kim +14
In a CDM universe, most galaxies evolve by mergers and accretions, leaving faint and/or diffuse structures, such as tidal streams and stellar halos. Although these structures ar…
Spatial distribution of dark matter in and around galaxy clusters traced by galaxies, gas and intracluster stars in a simulated universe
Jihye Shin, Jong Chul Lee, Ho Seong Hwang +5
To understand how well galaxies, gas and intracluster stars trace dark matter in and around galaxy clusters, we use the IllustrisTNG cosmological hydrodynamical simulation and comp…
Circumnuclear Medium around the Central AGN in a Cool-Core Cluster, Abell 1644-South
Junhyun Baek, Aeree Chung, Alastair Edge +3
We present the circumnuclear multi-phase gas properties of the brightest cluster galaxy (BCG) in the center of Abell 1644-South. A1644-S is the main cluster in a merging system, wh…
Is Abell 2261 a fossil galaxy cluster in a transitional dynamical state?
Hyowon Kim, Jongwan Ko, Rory Smith +5
Abell 2261 (A2661) is a well-studied fossil cluster, but previous studies give contradictory results on its dynamical states, such as its X-ray central entropy and magnitude gap. T…
Intracluster Light Properties in a Fossil Cluster at z=0.47
Jaewon Yoo, Jongwan Ko, Jae-Woo Kim +1
Galaxy clusters contain a diffuse stellar component outside the cluster's galaxies, which is observed as faint intracluster light (ICL). Using Gemini/GMOS-N deep imaging and multi-…
The variability of brightest cluster galaxies at high radio frequencies
Tom Rose, Alastair Edge, Sebastian Kiehlmann +6
Variability of a galaxy's core radio source can be a significant consequence of AGN accretion. However, this variability has not been well studied, particularly at high radio frequ…
The SAMI Galaxy Survey: Kinematics of stars and gas in brightest group galaxies; the role of group dynamics
Mojtaba Raouf, Rory Smith, Habib G. Khosroshahi +17
We study the stellar and gas kinematics of the brightest group galaxies (BGGs) in dynamically relaxed and unrelaxed galaxy groups for a sample of 154 galaxies in the SAMI galaxy su…
The Infrared Medium-deep Survey. VIII. Quasar Luminosity Function at
Yongjung Kim, Myungshin Im, Yiseul Jeon +27
Faint quasars with mag are known to be the potentially important contributors to the ultraviolet ionizing background in the post-reionization era. Howeve…
Toward Solving the Puzzle: Dissecting the Complex Merger A521 with Multi-wavelength Data
Mijin Yoon, Wonki Lee, M. James Jee +3
A521 has been a subject of extensive panchromatic studies from X-ray to radio. The cluster possesses a number of remarkable features including a bright radio relic with a steep spe…
More connected, more active: galaxy clusters and groups at z~1 and the connection between their quiescent galaxy fractions and large-scale environments
Seong-Kook Lee, Myungshin Im, Minhee Hyun +4
High-redshift galaxy clusters, unlike local counterparts, show diverse star formation activities. However, it is still unclear what keeps some of the high-redshift clusters active…
Medium-resolution Optical and Near-Infrared Spectral Atlas of 16 2MASS-selected NIR-red Active Galactic Nuclei at
Dohyeong Kim, Myungshin Im, Gabriela Canalizo +6
We present medium-resolution spectra (--4000) at 0.4--1.0\,m and 0.7--2.5\,m of 16 active galactic nuclei (AGNs) selected with red color in the near-infrared (NI…
The Infrared Medium-deep Survey. VI. Discovery of Faint Quasars at with a Medium-band-based Approach
Yongjung Kim, Myungshin Im, Yiseul Jeon +25
The faint quasars with mag are known to hold the key to the determination of the ultraviolet emissivity for the cosmic re-ionization. But only a few have been identi…
The Infrared Medium-deep Survey. IV. Low Eddington Ratio of A Faint Quasar at : Not Every Supermassive Black Hole is Growing Fast in the Early Universe
Yongjung Kim, Myungshin Im, Yiseul Jeon +15
To date, most of the luminous quasars known at have been found to be in maximal accretion with the Eddington ratios, , suggesting enhanced nuclear activ…
The Infrared Medium-deep Survey. III. Survey of Luminous Quasars at 4.7 z 5.4
Yiseul Jeon, Myungshin Im, Dohyeong Kim +21
We present our first results of the survey for high redshift quasars at . The search for quasars in this redshift range has been known to be challe…
The dependence of cluster galaxy properties on the central entropy of their host cluster
Jae-Woo Kim, Jongwan Ko, Ho Seong Hwang +4
We present a study of the connection between brightest cluster galaxies (BCGs) and their host galaxy clusters. Using galaxy clusters at from the Hectospec Cluster Surve…
Massive Galaxies are Larger in Dense Environments: Environmental Dependence of Mass-Size Relation of Early-Type Galaxies
Yongmin Yoon, Myungshin Im, Jae-Woo Kim
Under the cold dark matter (CDM) cosmological models, massive galaxies are expected to be larger in denser environments through frequent hierarchical mergers with other gala…
Discovery of A Faint Quasar at z~6 and Implications for Cosmic Reionization
Yongjung Kim, Myungshin Im, Yiseul Jeon +15
Recent studies suggest that faint active galactic nuclei may be responsible for the reionization of the universe. Confirmation of this scenario requires spectroscopic identificatio…
The Very Early Light Curve of SN 2015F in NGC 2442: A Possible Detection of Shock-Heated Cooling Emission and Constraints on SN Ia Progenitor System
Myungshin Im, Changsu Choi, Sung-Chul Yoon +4
The main progenitor candidate of Type Ia supernovae (SNe Ia) is white dwarfs in binary systems where the companion star is another white dwarf (double degenerate system) or a less…
Evolution of Star-formation Properties of High-redshift Cluster Galaxies since
Seong-Kook Lee, Myungshin Im, Jae-Woo Kim +4
Using a stellar mass limited sample of galaxies () at , we show that the tellar mass, rather than the environment, is the main…
Linking galaxies to dark matter haloes at : dependence of galaxy clustering on stellar mass and specific star formation rate
Jae-Woo Kim, Myungshin Im, Seong-Kook Lee +4
We study the dependence of angular two-point correlation functions on stellar mass () and specific star formation rate (sSFR) of galaxies at $z\sim1…