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Prog. Theor. Phys. Supplement No.169 (2007) pp. 92-96

Suzaku Observation of the CNO Emission Lines from the Cygnus Loop

Emi Miyata,¹ John P. Hughes,² Motohide Kokubun,³ F. Scott Porter,⁴ Kuniaki Masai⁵ and the Suzaku Team

¹Department of Earth and Space Science, Graduate School of Science,
Osaka University, Toyonaka 560-0043, Japan
²Department of Physics and Astronomy, Rutgers University,
136 Frelinghuysen Road, Piscataway, NJ 08854-8019, USA
³Institute of Space and Astronautical Science,
Japan Aerospace Exploration Agency, Sagamihara 229-8510, Japan
⁴NASA/Goddard Space Flight Center, Greenbelt, MD 20771, USA
⁵Department of Physics, Tokyo Metropolitan University, Hachioji 192-0397, Japan

Abstract:

We present the result of the Suzaku observation at the northeastern limb of the Cygnus Loop supernova remnant. The high detection efficiency together with the high spectral resolution of the Suzaku X-ray CCD camera enables us to detect highly-ionized C and N emission lines from the Cygnus Loop for the first time. Since there is a significant plasma structure over the field of view, we selected the softest region based on the ROSAT observation. The data are well characterized by a two-component non-equilibrium ionization model with different values of electron temperature. Abundances of C to Fe are all depleted to typically 0.3 solar except O. We found that the optical depth effect for resonance lines for O plays an important role in the X-ray emission of the Cygnus Loop.

URL : http://ptp.ipap.jp/link?PTPS/169/92/
DOI : 10.1143/PTPS.169.92

[ Full Text PDF : FREE ACCESS (341K) ] Citation: Plain Text BiBTeX EndNote(RIS) RSS

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Citing Article(s) :

1. Progress of Theoretical Physics Supplement No.169 (2007) pp. 97-102 :

   Suzaku Observation of the Galactic Diffuse

   Hiroshi Tsunemi

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