천문학회보 (The Bulletin of The Korean Astronomical Society)
- 제36권2호
- /
- Pages.78.2-78.2
- /
- 2011
- /
- 1226-2692(pISSN)
Chemical Properties of Emission Line Galaxies in the Virgo and Ursa Major Cluster
- Chung, Ji-Won (Chungnam national university) ;
- Sung, Eon-Chang (Korea Astronomy & Space Science Institute) ;
- Rey, Soo-Chang (Chungnam national university) ;
- Pak, Min-A (Chungnam national university) ;
- Kim, Suk (Chungnam national university)
- 발행 : 2011.10.05
초록
We utilize Sloan Digital Sky Survey DR7 spectroscopy of ~600 emission line galaxies (ELGs) in the Virgo and Ursa Major clusters to investigate their chemical properties depending on the environments. We derived chemical abundances of galaxies using either a direct estimation of the electron temperature or empirical calibrations. We also estimated star formation rates (SFRs) using H alpha and GALEX ultraviolet (UV) luminosities. We see no significant difference of UV colors and SFRs of ELGs between the Virgo and Ursa Major, indicating weak dependence of their star formation activity on global cluster environment. We also discuss the segregation of gas-phase element abundances in cluster environment.
키워드