The Bulletin of The Korean Astronomical Society (천문학회보)

The Korean Astronomical Society (한국천문학회)
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Study of galaxies in extensive area of the Virgo cluster

  • Kim, Suk (Korea Astronomy Space Science Institure) ;
  • Rey, Soo-Chang (Department of Astronomy and Space Science, Chungnam National University) ;
  • Sung, Eon-Chang (Korea Astronomy Space Science Institure) ;
  • Jerjen, Helmut (Australian National University) ;
  • Lisker, Thorsten (Zentrumfur Astronomie der Universitat Heidelberg) ;
  • Lee, Youngdae (Department of Astronomy and Space Science, Chungnam National University) ;
  • Chung, Jiwon (Department of Astronomy and Space Science, Chungnam National University) ;
  • Lee, Woong (Department of Astronomy and Space Science, Chungnam National University) ;
  • Chung, Aeree (Department of Astronomy, Yonsei University) ;
  • Yoon, Hyein (Department of Astronomy, Yonsei University)
  • Published : 2016.04.12
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Abstract

Nearby galaxy clusters and their surrounding regions represent the current endpoint of evolution galaxy cluster evolution. We present a new catalog of 1589 galaxies, what we call Extended Virgo Cluster Catalog (EVCC), in wider area of the Virgo cluster based on the Sloan Digital Sky Survey (SDSS) Data Release 7. The EVCC covers an area 5.2 times larger than the footprint of the classical Virgo Cluster Catalog, and reaches out to 3.5 times the virial radius of the Virgo cluster. The EVCC contains fundamental information such as membership, morphology, and photometric parameters of galaxies. The EVCC defines a comprehensive galaxy sample covering a wider range in galaxy density that is significantly different from the inner region of the Virgo cluster. It will be the foundation for forthcoming galaxy evolution studies in the extended Virgo cluster region, complementing ongoing and planned Virgo cluster surveys at various wavelengths. We also present the large scale structures in the field around the Virgo cluster. We identified seven galaxy filaments and one possible sheet in three dimensions of super-galactic coordinates based on the HyperLEDA database. By examining spatial distribution and Hubble diagram of galaxies, we found that six filaments are directly associated with the main body of the Virgo cluster. On the other hand, one filament and one sheet are structures located at background of the main body of Virgo cluster. The EVCC and the filament structures will be the foundation for forthcoming studies of galaxy evolution in various environments as well as buildup of the galaxy cluster at z ~ 0, complementing ongoing and planned Virgo cluster surveys at various wavelengths.

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