Suzaku observation of non-thermal superbubble 30 Dor C
Abstract
30 Dor C, one of the superbubble in the Large Magellanic Cloud, has a shell-like structure with a radius of ∼40 pc. The Chandra observations discovered synchrotron X-rays from the shell of 30 Dor C (Bamba et al. 2004), which indicates that the energy of the electrons reaches up to ∼TeV by shock acceleration. Since the recent Suzaku observations on SN 1987A covered the whole shell of 30 Dor C, we obtained its high-quality X-ray spectra. From the western shell, we detected very bright and hard non-thermal X-rays, and found that the spectrum was well-reproduced by a power-law model with exponential cutoff rather than a simple power-law. The obtained value of the cutoff frequency (∼3-6×1017 Hz) was significantly higher than that of SN 1006 (∼ 5 × 1016 Hz). From the northeastern and southeastern shells, on the other hand, thermal X-rays were detected in addition to the non-thermal emissions. The temperature of the thermal plasma (kTe ∼ 0.6 keV) was found to be higher than the value previously reported by Bamba et al. (2004).
- Publication:
-
37th COSPAR Scientific Assembly
- Pub Date:
- 2008
- Bibcode:
- 2008cosp...37.3525Y