The Bulletin of The Korean Astronomical Society (천문학회보)
- Volume 40 Issue 1
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- Pages.77.3-78
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- 2015
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- 1226-2692(pISSN)
Environmental Dependence of Galactic conformity in the Virgo Cluster
- Lee, Hye-Ran (Korea Astronomy and Space Science Institute) ;
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Lee, Joon Hyeop
(Korea Astronomy and Space Science Institute) ;
- Jeong, Hyunjin (Korea Astronomy and Space Science Institute) ;
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Park, Byeong-Gon
(Korea Astronomy and Space Science Institute)
- Published : 2015.04.10
Abstract
It is known that the galaxy evolution by direct interaction between galaxies is most active in a galaxy group. As a result, the satellite galaxies are closely related to their central galaxy in properties such as morphology, color and star formation rate (so-called 'galactic conformity'). However, it is not clear yet whether such conformity between galaxies is found in a galaxy cluster. Recently, Lee et al. (2014) have found a measurable correlation between the colors of bright galaxies and the mean colors of their faint companions in a cluster WHL J085910.0+294957 at z = 0.3, using the photometrically-selected cluster members. They suggest that such correlation may be the vestige of infallen groups in the cluster as one possibility. In order to confirm the small-scale conformity in galaxy clusters with higher reliability, we study the Virgo cluster using the Extended Virgo Cluster Catalog (EVCC). The cluster members are selected spectroscopically unlike in WHL J085910.0+294957. We examine the galactic conformity in two distinct areas of the Virgo cluster: the inner X-ray emission region and its outer region. We find a marginal conformity in color (>
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