IDGal
Study on the Galaxy Evolution Through the Interplay Between Stars and Interstellar Medium (Radiative Transfer Study of Ionized, Dusty Galaxies) |
PI | Kwang-Il Seon |
Co-I | Jong-Ho Shinn, Young-Soo Jo |
Description | Study the interplay between the ISM (Interstellar Medium), IGM (Intergalactic Medium), and stars through radiative transfer models. |
SULF
KMTNet Southern Sky Ultra-Faint Dwarf Satellite Galaxy Survey |
PI | Eon-Chang Sung |
Co-I | Jaemann Kyeong, Seok-Joo Joo, Soung-Chul Yang, Helmut Jerjen (ANU), Dongwon Kim (ANU), Soo-Chang Rey (CNU), Youngdae Lee (CNU) |
Description | KMTNet Southern Sky Ultra-Faint Dwarf Satellite Galaxy Survey (SULF) is a deep survey program to search for the ultra-faint dwarf satellite galaxies in the southern hemisphere. While hundreds of dwarf galaxies are predicted to be randomly distributed around our Milky Way galaxy by modern cosmological theory and galaxy formation simulations, only dozens of companion satellites are discovered thus far, even statistically aligned in a plane. This current discrepancy between the theory and observation may be at least partially caused by incompleteness in the census of dwarf satellites, and therefore, a substantial improvement in the cosmological models can only be achieved if the exact number and properties of those galaxies are provided. In order to detect those faint objects, we survey ~4,000 square degree of sky using the KMTNet 1.6-m telescope with wide field of view (2°x 2°) at CTIO. ![]() |
KSP
KMTNet Supernova Project |
PI | Dae-Sik Moon (Univ. of Toronto) |
Co-I | Sang Chul Kim, Jae-Joon Lee, Hong Soo Park, Avishay Gal-Yam (Weizmann Institute of Science), S. Bradley Cenko (Goddard Space Flight Center), D. Andrew Howell (LCOGT), Santiago Gonzalez-Gaitan (Universidad de Chile), Bon-Chul Koo (SNU), Mario Hamuy (Universidad de Chile), Stuart Ryder (AAO), Giuliano Pignata (Universidad Andres Bello), Moo-Young Chun, and Others |
Description | ![]() |
Dwarf
Evolution of Dwarf Galaxies in Different Environments |
PI | Sanjaya Paudel |
Co-I | Chang Hee Ree, Minjin Kim, Michael Hilker (ESO), Pierre-Alain Duc (CEA Saclay), Thorsten Lisker (Heidelberg) |
Description | ![]() 1) To understand the formation and evolution of early-type dwarf galaxies (dEs) in different environments such as cluster, group and the field, and to characterize the variation of structural and stellar population properties of dEs according to the environments where they reside. 2) To explore how the disruptive tidal forces shape the various structural and stellar population properties of galaxies and how likely that hierarchical cosmology could be the main driver of galaxy evolution in low mass scale. 3) To study the HI atomic gas structure around the merging dwarf galaxies which may offer indispensable information in constructing a detailed picture of a “BCD phase” being triggered by mergers between gas rich dwarf galaxies. |
Publications | SDSS J085431.18+173730.5: The First Compact Elliptical Galaxy Hosting an Active Nucleus, Sanjaya Paudel, Michael Hilker, Chang Hee Ree, Minjin Kim (2016) ApJ, 820L, 19 A Case Study for a Tidal Interaction between Dwarf Galaxies in UGC 6741, Sanjaya Paudel, Pierre-Alain Duc, Chang Hee Ree (2015) AJ, 149, 114 Tidal Interaction as the Origin of Early-type Dwarf Galaxies in Group Environments, Sanjaya Paudel, Chang Hee Ree (2014) ApJ, 796L, 14 An isolated, compact early-type galaxy with a diffuse stellar component: merger origin?, Sanjaya Paudel, Thorsten Lisker, K. S. A. Hansson, Avon Huxor (2014) MNRAS, 443, 446 |
Presentations | |
News | AAS NOVA Highlights, An Active Black Hole in a Compact Dwarf (4 May 2016) |
MUNIC
Multispectral Narrow-band Imaging Campaign for Nearby Old Stellar Systems |
PI | Chang Hee Ree |
Co-I | Hyunjin Jeong, Sang-Il Han, Young-Wook Lee (Yonsei) |
Description | ![]() |
Publications | Evidence for Enrichment by Supernovae in the Globular Cluster NGC 6273, Sang-Il Han, Dongwook Lee, Hyunju Seo, Young-Wook Lee (2015) ApJ, 813L, 43 |
Presentations | “Multispectral Narrow-band Imaging Campaign for Nearby Old Stellar Systems”, Chang H. Ree, Hyunjin Jeong, Sang-Il Han, Young-Wook Lee, Michael Hilker, EWASS 2016, S3: MUSE first year science and beyond, Athens, 4-8 July, 2016 |
KNGS
KMTNet Nearby Galaxy Survey |
PI | Minjin Kim |
Co-I | Yun-Kyeong Sheen, Woowon Byun, Joon Hyeop Lee, Kwang-Il Seon, Hyunjin Jeong, Sang Chul Kim |
Description | We will obtain deep and wide-field imaging of nearby galaxies using KMTNet telescope, in order to explore the origin of faint extended features in the outer regions of galaxies. |
ToMs
Tracing the Formation of Massive Galaxies |
PI | Hyunjin Jeong |
Co-I | Seok-Joo Joo, Suk Kim, Jaehyun Lee, Youngdae Lee |
Description | ![]() |
CLEVOR
CLuster EVOlution Research |
HIZ
Galaxy Formation and Evolution in High Redshift Universe |
PI | Yujin Yang |
Co-I | |
Description |
Computation: simulations and big data analysis
Several group members focus on 1) computational simulations on galaxy formation and evolution, and 2) computational data analysis of big astronomical data, particularly, produced by survey observation of galaxies. In the first topic, we have used various simulation codes such as Gadget, FLASH, RAMSES, and Athena to conduct (M)HD simulations of galaxy formation and evolution. We are also developing new approaches in modeling galaxy formation. In the second topic, our research exploits new machine learning and data analytics methods and technology in applications of astronomy. We have used various machine learning methods to analyze big astronomical data.
Recent research highlights are:
AVENGERS
Along Various ENvironments, Galaxy Evolution ResearcherS |
PI | Joon Hyeop Lee |
Co-I | Hye-Ran Lee, Mina Pak |
Consultant | Hyunjin Jeong, Soung-Chul Yang, Kwang-Il Seon, Yujin Yang, Rory Smith, Suk Kim |
Description | ![]() |
Publications | Small-scale Dynamical Coherence Accompanied with Galaxy Conformity, Joon Hyeop Lee, Mina Pak, Hye-Ran Lee (2020) ApJ, 893, 154 Mysterious Coherence in Several-megaparsec Scales between Galaxy Rotation and Neighbor Motion, Joon Hyeop Lee, Mina Pak, Hyunmi Song, Hye-Ran Lee, Suk Kim, Hyunjin Jeong (2019) ApJ, 884, 104 : NewScientist, VICE.com Stellar Populations of Nine Passive Spiral Galaxies from the CALIFA Survey: Are They Progenitors of S0s?, Mina Pak, Joon Hyeop Lee, Hyunjin Jeong, Suk Kim, Rory Smith, Hye-Ran Lee (2019) ApJ, 880, 149 Galaxy Rotation Coherent with the Motions of Neighbors: Discovery of Observational Evidence, Joon Hyeop Lee, Mina Pak, Hye-Ran Lee, Hyunmi Song (2019) ApJ, 872, 78 : Calar Alto Observatory Press Release, 천문연 보도자료 Color Dispersion as an Indicator of Stellar Population Complexity: Insights from the Pixel Color–Magnitude Diagrams of 32 Bright Galaxies in Abell 1139 and Abell 2589, Joon Hyeop Lee, Mina Pak, Hye-Ran Lee, Sree Oh (2018) ApJ, 857, 102 pCMD Analysis of the BCGs in Dynamically Young and Old Clusters A1139 and A2589, Joon Hyeop Lee, Sree Oh, Hyunjin Jeong, et al. (2017) ApJ, 844, 81 |