The Bulletin of The Korean Astronomical Society (천문학회보)
- Volume 35 Issue 2
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- Pages.40.1-40.1
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- 2010
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- 1226-2692(pISSN)
On the UV properties of Early Type Galaxies in Clusters
- Lee, Ji-Hye (Department of Astronomy, Yonsei University) ;
- Yi, Suk-Young K. (Department of Astronomy, Yonsei University) ;
- Jeong, Hyun-Jin (Department of Astronomy, Yonsei University) ;
- Sheen, Yun-Kyung (Department of Astronomy, Yonsei University)
- Published : 2010.10.06
Abstract
We present the ultraviolet (UV) properties of early type galaxies (ETGs) in clusters. We obtained a cluster catalogue from Yoon et al.(2008) based on Sloan Digital Sky Survey(SDSS) DR5 in the redshift range of 0.05 < z <0.10. After matching sample galaxies in clusters with Galaxy Evolution Explorer (GALEX) GR5, we have classified the morphologies of ETGs by UV-optical colour distributions and investigated them in terms of the ranks in magnitude in a cluster and in clustocentric distance. It has recently been suggested theoretically that brightest cluster galaxies (BCGs) show a strong UV upturn than non-BCGs, but we find that the difference between them is not significant. Moreover, to our surprise, it appears that density (environment) does not play any significant role to the UV properties. consequent of internal galaxy processes rather than that of environmental processes.
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