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The Korean Astronomical Society (한국천문학회)
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MID- AND FAR-INFRARED PROPERTIES OF LOCAL ACTIVE GALACTIC NUCLEI

  • Ichikawa, Kohei (Department of Astronomy, Graduate School of Science, Kyoto University) ;
  • Ueda, Yoshihiro (Department of Astronomy, Graduate School of Science, Kyoto University) ;
  • Terashima, Yuichi (Department of Physics, Faculty of Science, Ehime University) ;
  • Oyabu, Shinki (Graduate School of Science, Nagoya University) ;
  • Gandhi, Poshak (Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency) ;
  • Matsuta, Keiko (Department of Space and Astronautical Science, The Graduate University for Advanced Studies) ;
  • Nakagawa, Takao (Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency)
  • Received : 2012.07.01
  • Accepted : 2012.07.30
  • Published : 2012.09.16
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Abstract

We investigate the mid-infrared (MIR) to far-infrared (FIR) properties of a nearly complete sample of local active galactic nuclei (AGNs) detected in the Swift/Burst Alert telescope (BAT) all-sky hard X-ray (14-195 keV) survey, based on the cross correlation with the infrared survey catalogs of AKARI, IRAS and WISE. Out of 135 non-blazar AGNs in the Swift/BAT 9-month catalog, we obtain the MIR photometric data for 128 sources in either the 9, 12, 18, 22, and $25{\mu}m$ band. We find a good correlation between their hard X-ray and MIR luminosities ranging three orders of magnitude (42 < log ${\lambda}L_{\lambda}$(9, $18{\mu}m$) < 45), which is tighter than that with the FIR luminosities at $90{\mu}m$. Both X-ray unabsorbed and absorbed AGNs follow the same correlation, implying isotropic infrared emission, as expected in clumpy dust tori models rather than homogeneous ones.

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References

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