The Bulletin of The Korean Astronomical Society (천문학회보)
- Volume 37 Issue 2
- /
- Pages.68.2-68.2
- /
- 2012
- /
- 1226-2692(pISSN)
Mystery of the Most Isolated Globular Cluster in the Local Universe
- Jang, In Sung (Astronomy Program, Department of Physics and Astronomy, Seoul National University) ;
- Lim, Sungsoon (Astronomy Program, Department of Physics and Astronomy, Seoul National University) ;
- Park, Hong Soo (Astronomy Program, Department of Physics and Astronomy, Seoul National University) ;
- Lee, Myung Gyoon (Astronomy Program, Department of Physics and Astronomy, Seoul National University)
- Published : 2012.10.17
Abstract
We present a discovery of two new globular clusters in the Hubble Space Telescope archive images of the M81 group. They are located much farther from both M81 and M82 in the sky, compared with previously known star clusters in these galaxies. Both clusters show that higher luminosity and larger effective radius than typical globular clusters in Milky Way and M81. Using the available spectroscopic data provided by the Sloan Digital Sky Survey, we derive a low metallicity with [Fe/H]
Keywords