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The Korean Astronomical Society (한국천문학회)
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STUDY OF SPECTRAL ENERGY DISTRIBUTION OF GALAXIES WITH PRINCIPAL COMPONENT ANALYSIS

  • Kochi, Chihiro (Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency) ;
  • Nakagawa, Takao (Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency) ;
  • Isobe, Naoki (Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency) ;
  • Shirahata, Mai (National Astronomical Observatory of Japan) ;
  • Yano, Kenichi (Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency) ;
  • Baba, Shunsuke (Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency)
  • Received : 2015.09.01
  • Accepted : 2016.10.24
  • Published : 2017.03.31
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Abstract

We performed Principle Component Analysis (PCA) over 264 galaxies in the IRAS Revised Bright Galaxy Sample (Sanders et al., 2003) using 12, 25, 60 and $100{\mu}m$ flux data observed by IRAS and 9, 18, 65, 90 and $140{\mu}m$ flux data observed by AKARI. We found that (i)the first principle component was largely contributed by infrared to visible flux ratio, (ii)the second principal component was largely contributed by the flux ratio between IRAS and AKARI, (iii)the third principle component was largely contributed by infrared colors.

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References

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