The Bulletin of The Korean Astronomical Society (천문학회보)

The Korean Astronomical Society (한국천문학회)
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Structural Parameters of Galaxies in the Virgo Cluster

  • Kim, Suk (Dept. of Astronomy and Space Science, Chungnam National University) ;
  • Yi, Wonhyeong (Dept. of Astronomy and Space Science, Chungnam National University) ;
  • Rey, Soo-Chang (Dept. of Astronomy and Space Science, Chungnam National University) ;
  • Sung, Eon-Chang (Korea Astronomy & Space Science Institute) ;
  • Jerjen, Helmut (Australian National University) ;
  • Lisker, Thorsten (Zentrum fur Astronomie der Universitat Heidelberg) ;
  • Lee, Youngdae (Dept. of Astronomy and Space Science, Chungnam National University) ;
  • Lee, Woong (Dept. of Astronomy and Space Science, Chungnam National University) ;
  • Chung, Jiwon (Dept. of Astronomy and Space Science, Chungnam National University) ;
  • Pak, Mina (Dept. of Astronomy and Space Science, Chungnam National University)
  • Published : 2013.10.08
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Abstract

We present structural parameters of galaxies in the Extended Viro Cluster Catalog (EVCC), new catalog of galaxies in the Viro cluster using homogeneous Sloan Digital Sky Survey (SDSS) Date Release 7 (DR7) data. The EVCC covers more extended region of the Viro cluster than of the Virgo Cluster Catalog (VCC) and presents updated morphologies of galaxies using multi-band images and spectral features. We obtain the surface brightness profiles of galaxies using ellipse task in IRAF. Based on the analysis of surface brightness profile we construct a catalog of various structural parameters of galaxies, i.e. central surface brightness, effective radius, sersic index, effective surface brightness, and mean effective surface brightness. Taking advantage of these structural parameters in various parameter spaces, we refine criteria of dividing giant elliptical and dwarf elliptical galaxies. In addition, we found that bulge dominated galaxies have larger sersic index and brighter central surface brightness than disk dominated galaxies. At fixed magnitude, dwarf elliptical galaxies dwarf lenticular galaxies, and dwarf irregular low surface brightness (LSB) galaxies show larger effective radii than giant elliptical galaxies, giant lenticular galaxies, and irregular high surface brightness (HSB) galaxies, respectively. Dwarf elliptical galaxies and dwarf irregular LSB galaxies occupy the similar structural parameter spaces. We suggest that giant elliptical galaxies and dwarf elliptical galaxies may have different origin.

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