Probing the Starburst-AGN Connection in Type I AGN based on the 3.3 micron PAH lines

  • Woo, Jong-Hak (Astronomy Program, Department of Physics and Astronomy, Seoul National University) ;
  • Kim, Ji-Hoon (Center for the Exploration of the Origin of the Universe, Department of Physics and Astronomy, Seoul National University) ;
  • Imanishi, Masatoshi (National Astronomical Observatory of Japan)
  • Published : 2011.10.05

Abstract

To probe the connection between starburst and AGN activity, we investigate the relation between the 3.3 micron~PAH emission and AGN properties based on the new AKARI observations and the data collected from the literature. Using a sample of low-z Type I AGN, we measure the global 3.3 micron PAH luminosity from the AKARI slit-less spectroscopy. The 3.3 ${\backslash}$micron~PAH emissions are detected for 7 out of 26 target galaxies, but we find no strong correlation between the 3.3 ${\backslash}$micron~PAH emission and AGN luminosity, suggesting that global star formation may not be tightlyrelated with AGN activity. In contrast the to global star formation, the nuclear 3.3 micron~PAH emission luminosity, which are measured from ground-based long slit spectroscopy with a narrow slit, correlates with AGN luminosity. These results imply that starburst and AGN activity are directly connected at the nuclear region.

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