DOI QR코드

DOI QR Code

THE 3.3 MICRON PAH EMISSION OF THE MID-INFRARED EXCESS GALAXIES DISCOVERED BY THE AKARI MID-INFRARED ALL-SKY SURVEY

  • Yamada, R. (Graduate school of science, Nagoya University) ;
  • Oyabu, S. (Graduate school of science, Nagoya University) ;
  • Kaneda, H. (Graduate school of science, Nagoya University) ;
  • Yamagishi, M. (Graduate school of science, Nagoya University) ;
  • Ishihara, D. (Graduate school of science, Nagoya University) ;
  • Kim, J.H. (Department of Physics and Astronomy, Seoul National University) ;
  • Im, M. (Department of Physics and Astronomy, Seoul National University) ;
  • Toba, Y. (Institute of Space and Astronomical Science, Japan Aerospace Exploration Agency) ;
  • Matsuhara, H. (Institute of Space and Astronomical Science, Japan Aerospace Exploration Agency)
  • Received : 2012.07.01
  • Accepted : 2012.08.12
  • Published : 2012.09.16

Abstract

We investigate the relation between star formation activity and PAH $3.3{\mu}m$ emission. Our targets are mid-infrared-excess galaxies selected from the AKARI all-sky survey point source catalog. We performed AKARI near-infrared spectroscopy for them. As a result, we obtained $2.5-5{\mu}m$spectra of 79 galaxies, and selected 35 star-forming galaxies out of them. Comparing the PAH $3.3{\mu}m$ luminosities with the infrared luminosities, we find a linear correlation between them. However, by adding the results from literatures for luminous infrared galaxies and ultra-luminous infrared galaxies that are more luminous than our sample, the ratio of the PAH to the infrared luminosity is found to decrease towards the luminous end.

References

  1. Sanders, D. B. & Mirabel, I. F., 1996, Luminous Infrared Galaxies, ARA&A, 34, 749 https://doi.org/10.1146/annurev.astro.34.1.749
  2. Imanishi, M., et al., 2008, Systematic Infrared 2.5- 5 ${\mu}m$ Spectroscopy of Nearby Ultraluminous Infrared Galaxies with AKARI, PASJ, 60, S489
  3. Imanishi, M., et al., 2010, AKARI IRC Infrared 2.5-5 ${\mu}m$ Spectroscopy of a Large Sample of Luminous Infrared Galaxies, ApJ, 721, 1233 https://doi.org/10.1088/0004-637X/721/2/1233
  4. Moorwood, A. F. M., 1986, 3.28 Micron Feature and Continuum Emission in Galaxy Nuclei, A&A, 166, 4
  5. Mouri, H., et al., 1990, A Relation between H2 V = 1-0 S(1) and 3.28 Micron Emission in Seyfert and Starburst Galaxies, ApJ, 356, L39 https://doi.org/10.1086/185745
  6. Oyabu, S., et al. 2011, AKARI Detections of Hot Dust in Luminous Infrared Galaxies. Search for Dusty Active Galactic Nuclei, A&A 529, 122 https://doi.org/10.1051/0004-6361/201014221