The Nature of a Cosmic-Ray Accelerator, CTB 37 B, Observed with Suzaku and Chandra

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概要

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• We report on Suzaku and Chandra observations of the young supernova remnant CTB 37 B, from which TeV gamma-rays were detected by the H.E.S.S. Cherenkov telescope. The 80 ks Suzaku observation provided us with a clear image of diffuse emission and high-quality spectra. The spectra revealed that the diffuse emission is comprised of thermal and non-thermal components. The thermal component can be represented by an NEI model with a temperature, a pre-shock electron density and an age of 0.9 +/- 0.2 keV, 0.4 +/- 0.1 cm(-3), and 650(-300)(+2500) yr, respectively. This suggests that the explosion of CTB 37 B occurred ill a low-density space. A non-thermal power-law component was found from the southern region of CTB 37 B. Its photon index of similar to 1.5 and a high roll-off energy (greater than or similar to 15 keV) indicate efficient cosmic-ray acceleration. A comparison of this X-ray spectrum with the TeV gamma-ray spectrum leads us to conclude that the TeV gamma-ray emission seems to be powered by either multi-zone Inverse Compton scattering or the decay of neutral pions. The point source resolved by Chandra near the shell is probably associated with CTB 37 B, because of the common hydrogen column density with the diffuse thermal emission. Spectral and temporal characteristics Suggest that this source is a new anomalous X-ray pulsar.

• Astronomical Society of Japanの論文
• 2009-01-30

著者

• Tanaka Y

  Saitama Univ. Saitama

• Ishida M

  Japan Aerospace Exploration Agency Institute Of Space And Astronautical Science

• ISHIDA Manabu

  Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency

• Wagner Stefan

  Landessternwarte Universitat Heidelberg

• Takei Yoh

  Institute Of Space And Astronautical Science Japan Aerospace Exploration Agency

• Itoh M

  Institute Of Industrial Science University Of Tokyo

• Itoh Masayuki

  Japan Aerospace Exploration Agency Institute Of Space And Astronautical Science

• Yasuda Tatsuki

  Faculty Of Science Kagoshima University

• BAMBA Aya

  The Institute of Physical and Chemical Research (RIKEN)

• NAKAMURA Ryoko

  Institute of Space and Astronautical Science, JAXA

• Nakajima Hiroshi

  Department Of Earth And Space Science Osaka University

• YAMAZAKI Ryo

  Department of Physical Science, Hiroshima University

• NAKAMURA Ryoko

  ISAS, JAXA

• Bamba Aya

  Institute Of Space And Astronautical Science Jaxa

• Ishida Manabu

  Institute Of Space And Astronautical Science

• BAMBA Aya

  JAXA

• NAKAJIMA Hiroshi

  JAXA

• YAMAZAKI Ryo

  Institute of Space and Astronautical Science

• TERADA Yukikatsu

  JAXA

• PUHLHOFER Gerd

  Department of Physics, Graduate School of Science, Kyoto University

• WAGNER Stefan

  Department of Physical Science, Hiroshima University

• Terada Yukikatsu

  Department Of Physics Saitama University

• Ishikawa Masaki

  Jaxa Ibaraki

• Nakajima Hiroshi

  Department Of Biochemistry Central Research Institute Maruha Corporation

• Yamazaki Ryo

  Department Of Physical Science Hiroshima University

• Yamazaki Ryo

  Department Of Earth And Space Science Osaka University

• Yamazaki Ryo

  Department Of Earth And Space Science Osaka University:department Of Physics Hiroshima University

• Puhlhofer Gerd

  Landessternwarte Universitat Heidelberg

• Terada Yukikatsu

  National Astronomical Observatory Of Japan

• Terashima Yuichi

  Department Of Physics Nagoya University

• Nakamura Ryoko

  Institute Of Space And Astronautical Science / Jaxa

• Yamashita Takuya

  Astrophysical Science Center Hiroshima University

• Bamba Aya

  Department Of Physics Graduate School Of Science Kyoto University

• Nakajima H

  Department Of Earth And Space Science Osaka University

• Tanaka Yasuo

  The Institute Of Space And Astronautical Science

• Ishida Manabu

  Jaxa Kanagawa

• Nakajima Hiroshi

  Department of Physics, Nihon University

• NAKAJIMA Hiroshi

  Department of Physics, Kyoto University

• NAKAJIMA Hiroshi

  Department of Physics, Science University of Tokyo

• NAKAJIMA Hiroshi

  Department of Allergy and Clinical Immunology, Chiba University Hospital

• WAGNER Stefan

  Landessternwarte, Universitat Heidelberg

• Bamba Aya

  Department of Science and Engineering, Aoyama Gakuin University

• BAMBA Aya

  RIKEN (The Institute of Physical and Chemical Research)

• ISHIDA Manabu

  Department of High Energy Astrophysics, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency

• TANAKA Yasuo

  Max-Planck-Institut fur extraterestrische Physik

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