|Welcome to Prof. Sukyoung K. Yi's group (GEM) homepage
이석영 교수의 은하진화 연구 그룹 홈페이지에 오신것을 환영합니다.
The ultimate goal of our group is to understand the formation and evolution of galaxies. We work on various versions of galaxy formation theories, focusing on dynamical clustering of galaxies and galactic chemical evolution in combination with stellar population synthesis. We extensively, but not exclusively, use SDSS and GALEX data to test our theoretical models.
The 2018 GEM workshop will be held on 2 - 4 July, 2018 in Kangnung, Korea
Dr. Scott Croom, Dr. Julia Bryant and Dr. Warrick Couch will visit GEM (10-13 Apr 2017)
Dr. Barbara Cantinella and Dr. Luca Cortese at ICRAR are visiting GEM (1-15 Apr 2017)
SAMI workshop will be held at KASI. (12 Apr 2017)
Environment workshop wiil be held. (3 Apr 2017)
Dr. Kang Xi and Dr. Emanuel Contini from the Purple Mountain Observatory (PMO) will visit GEM (9-13 May 2016) (See the poster)
Prof. Christophe Pichon at IAP and his group members visited GEM (12 Feb 2016)
Dr. Sanjaya Paudel visited GEM (22 Jan 2016)
GEM group members participated in the 227th AAS meeting in Florida giving presentations (05-09 Jan 2016)
The former GEMer Kyuseok Oh has been awarded "A best thesis at Yonsei". Congratulations to Dr. Oh! (Nov 2015)
Honggeun Khim has been awarded "The Jung Sung Ki Alumnus award" for excellent research performance. Congratulations to Khim! (Nov 2015)
Early-type Galaxy Spin Evolution in the Horizon-AGN Simulation
We analyzed the Horizon-AGN simulation, a cosmological galaxy formation simulation to investigate
the differences in the evolution of ETGs with different spin properties. We found that massive central ETGs form through
numerous mergers and are preferentially very slowly rotating. However, group and cluster satellite ETGs, which are multiple times
more numerous than the massive central ETGs, show slow rotation but not because of mergers but because of environmental tidal interactions
such as fly-bys or tidal force of the cluster potential.
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