A Suzaku Observation of the Low-Ionization Fe-Line Emission from RCW 86(Chapter 4. Warm and Hot IntraGalactic Medium, The Extreme Universe in the Suzaku Era)

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概要

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• The newly operational X-ray satellite Suzaku observed the southwestern quadrant of the supernova remnant (SNR) RCW 86 in February 2006 to study the nature of the 6.4keV emission line. The new data localize it for the first time; most of the line emission is adjacent and interior to the forward shock and not at the locus of the continuum hard emission. We also report the first detection of a 7.1keV line that we interpret as the Kβ emission from low-ionization iron. The Fe-K line features are consistent with a non-equilibrium plasma of Fe-rich ejecta with n_et>10^9cm^<-3> s and kT_e〜5keV. This combination of low net and high kT_e suggests collisionless electron heating in an SNR shock. The Fe Kα line shows evidence for intrinsic broadening, with a width of 47 (34-59)eV (99% error region). The difference of the spatial distributions of the hard continuum above 3keV and the Fe-K line emission support a synchrotron origin for the hard continuum.

• 理論物理学刊行会の論文
• 2007-12-19

著者

• KATAOKA Jun

  Department of Physics, Faculty of Science, Tokyo Institute of Technology

• SHIBATA Ryo

  Department of Particle and Astrophysics, Nagoya University

• Shibata R

  Inst. Space And Astronautical Sci. Kanagawa

• Ueno Masaru

  Department Of Earth And Space Science Osaka University

• Uchino Masahiro

  Osaka Univ. Osaka Jpn

• SHIBATA Ryo

  The Institute of Space and Astronautical Science

• Kataoka Jun

  Inst. Of Space And Astronautical Sci. 3-1-1 Yoshinodai Sagamihara 229-8510 Jpn

• Uchino Masahiro

  Hirosaki Univ. Aomori

• Ueno Masaru

  Department Of Physiscs Graduate School Of Science Kyoto University

• PETRE Robert

  NASA Goddard Space Flight Center

• Petre R

  Astrophysics Science Division Nasa Goddard Space Flight Center

• Kataoka Jun

  Tokyo Institute of Technology

• HARRUS Ilana

  Exploration of the Universe Division, NASA/Goddard Space Flight Center

• HARRUS Ilana

  Department of Physics and Astronomy, Johns Hopkins University

• USHIO Masayoshi

  ISAS, JAXA

• PETRE Robert

  Code 662, NASA Goddard Space Flight Center

• Ueno M

  Osaka Univ. Osaka

• Petre R

  Laboratory For High Energy Astrophysics Nasa/gsfc

• Kotoku Jun'ichi

  Department Of Physics Faculty Of Science Tokyo Institute Of Technology

• Kotoku Jun'ichi

  Department Of Physics Tokyo Institute Of Technology

• Kotoku Jun'ichi

  Department Of Physics The University Of Tokyo

• UENO Masaru

  Physics Department, Tokyo Institute of Technology

• SATO Rie

  Physics Department, Tokyo Institute of Technology

• KATAOKA Jun

  Physics Department, Tokyo Institute of Technology

• Sato Rie

  Department Of Physics Faculty Of Science Tokyo Institute Of Technology

• UENO Masaru

  Department of physics, Faculty of Science, Tokyo Institute of Technology

• KATAOKA Jun

  Tokyo I. Tech.

• PETRE Robert

  NASA Goddard Space Flight Center, X-ray Astrophysics Laboratory

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