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A Spatial Study of X-ray Properties in Superbubble 30 Dor C with XMM-Newton

  • Y. Babazaki (a1), I. Mitsuishi (a1), H. Sano (a1), S. Yoshiike (a1), T. Fukuda (a1), S. Maruyama (a1), K. Fujii (a1), Y. Fukui (a1), Y. Tawara (a1) and H Matsumoto (a2)...

Abstract

The superbubble (SB) 30 Dor C with the strong non-thermal X-ray emission is one of the best targets for study of the cosmic-ray (CR) acceleration. We investigated X-ray spectral properties of the SB with a high spatial resolution of ~10 pc. Consequently, the spectra in the east regions can be described with a combination of absorbed thermal and non-thermal models while the spectra in the west regions can be fitted with an absorbed non-thermal model. We found that the observed photon index and intensity in 2-10 keV show variations of 2.0-3.5 and (0.6-8.0) × 10−7 erg s−1 cm−2 str−1, respectively. The results are possibly caused by the spatial variation of the CR acceleration efficiency and/or the circumstellar environment.

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References

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Sano, H. et al. 2015, ApJ, 799, 175S
Bamba, A., et al. 2004, ApJ, 602, 257
The H. E. S. S. Collaboration 2015, Science, 347, 406
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