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The Korean Astronomical Society (한국천문학회)
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CHANDRA OBSERVATIONS OF THE AKARI NEP DEEP FIELD

  • Miyaji, T. (Instituto de Astronomia, Universidad Nacional Autonoma de Mexico) ;
  • Krumpe, M. (Max-Planck-Institut fur extraterrestrische Physik) ;
  • Brunner, H. (Max-Planck-Institut fur extraterrestrische Physik) ;
  • Ishigaki, T. (Physics Section, Iwate University) ;
  • Hanami, H. (Physics Section, Iwate University) ;
  • Markowitz, A. (University of California) ;
  • Takagi, T. (Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency) ;
  • Goto, T. (Inst. of Astronomy and Dept. of Physics, National Tsing Hua Univ.) ;
  • Malkan, M.A. (Department of Physics and Astronomy, UCLA) ;
  • Matsuhara, H. (Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency) ;
  • Pearson, C. (RAL Space, STFC Rutherford Appleton Laboratory) ;
  • Ueda, Y. (Department of Astronomy, Kyoto University) ;
  • Wada, T. (Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency)
  • Received : 2015.09.04
  • Accepted : 2016.10.20
  • Published : 2017.03.31
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Abstract

The AKARI NEP Deep Field Survey is an international multiwavelength survey over $0.4deg^2$ of the sky. This is the deepest survey made by the InfraRed Camera (IRC) of the infrared astronomical satellite AKARI with 9 filters continuously covering the $2-25{\mu}m$ range, including three filters in the Spitzer gap between the IRAC and MIPS coverages. This enabled us to make sensitive MIR detection of AGN candidates at z~ 1, based on hot dust emission in the AGN torus. It is also efficient in detecting highly obscured Compton-thick AGN population. In this article, we report the first results of X-ray observations on this field. The field was covered by 15 overlapping Chandra ACIS-I observations with a total exposure of ~300 ks, detecting ${\approx}450$ X-ray sources. We utilize rest-frame stacking analysis of the MIR AGN candidates that are not detected individually. Our preliminary analysis shows a marginal detection of the rest-frame stacked Fe $k{\alpha}$ line from our strong Compton-thick candidates.

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References

  1. Matsuhara, H., Wada, T., Matsuura, S., et al., 2006, Deep Extragalactic Surveys around the Ecliptic Poles with AKARI (ASTRO-F), PASJ, 58, 673 https://doi.org/10.1093/pasj/58.4.673
  2. Krumpe, M., Miyaji, T., Brunner, H., et al., 2014, Chandra survey in the AKARI North Ecliptic Pole Deep Field. I. X-ray data, point-like source catalog, sensitivity maps, and number counts, MNRAS, in press (arXiv:1409.7697)
  3. Hanami H., Ishigaki T., Fujishiro N., et al., 2012, Star Formation and AGN Activity in Galaxies Classified Using the 1.6m Bump and PAH Features at z = 0.4 - 2, PASJ, 64, 70 https://doi.org/10.1093/pasj/64.4.70