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UV Perspective for Dynamically Old and Young Clusters of Galaxies: Fornax and Virgo
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  • UV Perspective for Dynamically Old and Young Clusters of Galaxies: Fornax and Virgo
  • UV Perspective for Dynamically Old and Young Clusters of Galaxies: Fornax and Virgo
저자명
이영대,이수창,박민아,김석,성언창,이원형,정지원,Lee. Young-Dae,Rey. Soo-Chang,Pak. Min-A,Kim. Suk,Sung. Eon-Chang,Yi. Won-Hyeong,Chung. Ji-Won
간행물명
천문학회보
권/호정보
2011년|36권 2호|pp.76-76 (1 pages)
발행정보
한국천문학회
파일정보
정기간행물|ENG|
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이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
서지반출

기타언어초록

We present ultraviolet (UV) photometric properties of galaxies in two clusters, the Fornax and Virgo, with different dynamical conditions. We construct UV color-magnitude relations (CMRs) of galaxies in the Fornax and Virgo clusters using GALEX UV data matching with optical B band data. Elliptical and lenticular galaxies locate on red sequence in UV CMRs and show UV upturn phenomenon in both clusters. While dwarf lenticular galaxies (dS0s) in the Fornax also follow the extension of red sequence of giant early type galaxies, they are redder than dS0s in the Virgo at a given magnitude. We also investigated the effect of neighbor galaxies and cluster environment to the UV properties. In the space of projected clustercentric radius and projected nearest neighbor galaxy distance, we found that red (NUV-B>3) galaxy fraction of the Fornax depends entirely on clustercentric radius. However, in the case of Virgo, galaxy colors are also affected by interactions between galaxies outside the cluster virial radius. We suggest that UV properties of early-type galaxies in the Fornax cluster is likely consistent with its dynamically evolved system compared to the Virgo cluster.