천문학회보 (The Bulletin of The Korean Astronomical Society)
- 제39권2호
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- Pages.51.2-51.2
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- 2014
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- 1226-2692(pISSN)
Discovery of an Ultra Faint Dwarf Galaxy in the Virgo Core
- Jang, In Sung (Department of Physics and Astronomy, Seoul National University) ;
- Lee, Myung Gyoon (Department of Physics and Astronomy, Seoul National University)
- 발행 : 2014.10.13
초록
Ultra faint dwarf galaxies (UFDs) are larger but fainter than globular clusters, being the faintest galaxies in the universe. They have been found only in the Local Group. We report the discovery of an UFD in the intracluster field of the Virgo cluster (Virgo UFD1). It is located near the core of Virgo cluster, and far from any massive galaxies. The color magnitude diagram of resolved stars in Virgo UFD1 shows narrow, metal poor red giant branch (RGB), which is very similar to the UFDs in the Local Group. by comparing RGB in this galaxy with 12 Gyr stellar isochrones, we estimate its distance,
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