Welcome to Prof. Sukyoung K. Yi's group (GEM) homepage

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.

  • 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)
  • International workshop on galaxy clusters and galaxy formation was held at Yonsei Univ. (19-23 Oct 2015)
  • Trakhtenbrot et al. (2015) (also refer this article: Chandra Press release) which reports extremely massive black hole at z=3.328 and also former GEMer Hyewon Suh co-authored has been published in Science (Jul 2015)
  • Oh et al. (2015) has been published in ApJS (Jul 2015)
  • Jay's PhD viva: congratulations to Dr. Lee! (18 Jun 2015)

  • Title: On the evolution of galaxy spin in a cosmological hydrodynamic simulation of galaxy clusters

    Using zoom-in simulations of galaxy clusters, we investigated the evolution of galaxy rotation and their merger histories. We found that
    1) there is a global trend of decreasing rotation since z=3,
    2) mergers do not contribute as much as we expect to the decrease in galaxy rotation.
    We are digging deeper to understand what else than mergers are playing such important role in the evolution of galaxy rotation.
    Full text [ADS]

    Last modified: 2017-02-17
       Since 25 March 2010
    Dept. of Astronomy, Yonsei University
    134 shinchon-dong, Sudaemun-gu, Seoul 120-179 Korea
    Copyright 2006 Galaxy Evolution Meeting. Maintained by K. Kim