Suzaku Observations of Active Galactic Nuclei Detected in the Swift/BAT Survey(Chapter 11. Synergy with Suzaku and Other Missions, The Extreme Universe in the Suzaku Era)

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概要

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• We present the first results of Suzaku follow-up of new AGNs detected in the Swift/BAT survey. The Suzaku spectra of Swift J0601.9-8636 and Swift J0138.6-4001 reveal a heavily absorbed power law component with a column density of N_H≃10^<23.5-24>cm^<-2> that dominates above 10keV, and an intense reflection component with a solid angle ≳2π from a cold, optically thick medium. We find that these AGNs have an extremely small fraction of scattered light from the nucleus (≲0.5%) with respect to the intrinsic power law component. This indicates that they are buried in a very geometrically-thick torus with a small opening angle and/or have unusually small amount of gas responsible for scattering. Our results imply that there must be a significant number of yet unrecognized, very Compton thick AGNs in the local universe, which are difficult to detect even in the currently most sensitive optical or hard X-ray surveys.

• 理論物理学刊行会の論文
• 2007-12-19

著者

• UEDA Yoshihiro

  Department of Astronomy, Kyoto University

• EGUCHI Satoshi

  Department of Astronomy, Kyoto University

• Yamagami Takamasa

  Institute Of Space And Astronautical Science Japan Aerospace Exploration Agency

• Yamagami Takamasa

  Institute Of Space And Astronautical Science

• MUSHOTZKY Richard

  Astrophysics Science Division, NASA/GSFC, Code 662, X-ray Astrophysics

• GEHRELS Neil

  NASA, Goddard Space Flight Center

• UEDA Yoshihiro

  The Institute of Space and Astronautical Science

• TERASHIMA Yuichi

  Department of Astrophysics, Nagoya University

• Eguchi Satoshi

  Kyoto Univ. Kyoto

• Mushotzky R

  Astrophysics Science Division Nasa/gsfc Code 662 X-ray Astrophysics

• Ueda Y

  Kyoto Univ. Kyoto

• MUSHOTZKY Richard

  NASA Goddard Space Flight Center

• Gehrels Neil

  Nasa Goddard Space Flight Center

• MUSHOTZKY Richard

  NASA, Goddard Space Flight Center

• TUELLER Jack

  NASA, Goddard Space Flight Center

• MARKWARDT Craig

  NASA, Goddard Space Flight Center

• TUELLER Jack

  NASA GSFC

• URATA Yuji

  RIKEN

• Eguchi Satoshi

  Department Of Astronomy Kyoto University

• Ueda Yoshihiro

  Department Of Applied Biological Chemistry The University Of Tokyo

• Mushotzky R

  Nasa Goddard Space Flight Center

• Mushotzky Richard

  Astrophysics Science Division Nasa/gsfc Code 662 X-ray Astrophysics

• Terashima Yuichi

  Department Of Physics Ehime University

• Terashima Yuichi

  Institute Of Space And Astronautical Science

• Tawara Y

  Department Of Physics School Of Science The University Of Tokyo

• Yamagami T

  Institute Of Space And Astronautical Science Japan Aerospace Exploration Agency

• Markwardt Craig

  Nasa Gsfc:department Of Astronomy University Of Maryland

• Yamagami Takamasa

  Institute Of Space And Astronautical Science Jaxa.

• Yamamoto Takayuki

  Coordinated Space Observation And Experiment Research Group Institute Of Physical And Chemical Resea

• MARKWARDT Craig

  NASA GSFC:Department of Astronomy, University of Maryland

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