천문학회보 (The Bulletin of The Korean Astronomical Society)
- 제42권1호
- /
- Pages.30.2-31
- /
- 2017
- /
- 1226-2692(pISSN)
Environmental effects in the stellar populations of Compact Elliptical galaxies
- Kim, Suk (Korea Astronomy & Space Science institute) ;
- Jeong, Hyunjin (Korea Astronomy & Space Science institute) ;
- Lee, Youngdae (Korea Astronomy & Space Science institute) ;
- Joo, Seok-Joo (Korea Astronomy & Space Science institute) ;
- Lee, Jaehyun (Korea Astronomy & Space Science institute) ;
- Sung, Eon-Chang (Korea Astronomy & Space Science institute)
- 발행 : 2017.04.10
초록
Compact elliptical (cE) galaxies are in a rare class of stellar systems characterized by high stellar densities, small sizes, high velocity dispersion, and high metallicity corresponding to elliptical galaxies. cE galaxies have been observed around massive galaxies, so they could be formed under strong influences of tidal stripping and truncation. However, the recent discovery of isolated cE galaxies requires the need of new formation scenarios. We aim at finding cE galaxies in various environments using SDSS DR12, and studying stellar population of cEs as function of environments. Based on the typical properties of cE galaxies, we selected cE candidates by restricting that low-luminosity Mg > 19.5 mag, small sizes Re < 700 pc, and high velocity dispersions
키워드