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arXiv 0808.3501astro-ph
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朱雀观测30Dor C:一颗具有最大非热壳层的超新星遗迹

Suzaku Observation of 30Dor C: A Supernova Remnant with the Largest Non-Thermal Shell

Hiroya Yamaguchi, Aya Bamba, Katsuji Koyama

摘要:

本文报道了30 Dor C的热和非热特征的朱雀研究结果,它是一个位于大麦云(LMC)超泡中的超新星遗迹(SNR)。西边缘的X射线光谱是非热的,没有热成分。一个单一的幂律模型被拒绝,但与光谱截止的幂律模型被接受。$(3-7)\times 10^{17}$ Hz的截止频率在壳型SNR(如SN 1006($\sim 6\times 10^{16}$ Hz))中最高,因此30 D或C将是SNR冲击的最高能量加速器的位置。东南(SE)和东北(NE)边缘既有热分量,也有非热分量。两边缘的薄热等离子体处于碰撞电离平衡态。在SE边缘的等离子体的电子温度($kT_e \sim 0.7$ keV)被发现是高于以前报道的值。东南部的幂律指数与西部的幂律指数基本相同,而东北部的幂律指数大于西部。SNR年龄应在$(4-20)\times 10^3$年范围内。因此,30 D或C可能是最古老的非热发射壳状SNR。

英文摘要:

This paper reports on the Suzaku results of thermal and non-thermal features of 30 Dor C, a supernova remnant (SNR) in a superbubble of the Large Magellanic Cloud (LMC). The west rim exhibits a non-thermal X-ray spectrum with no thermal component. A single power-law model is rejected but a power-law model with spectral cutoff is accepted. The cutoff frequency of $(3-7)\times 10^{17}$ Hz is the highest among the shell type SNRs like SN 1006 ($\sim 6\times 10^{16}$ Hz), and hence 30 Dor C would be the site of the highest energy accelerator of the SNR shock. The southeast (SE) and northeast (NE) rims have both the thermal and non-thermal components. The thin-thermal plasmas in the both rims are in collisional ionization equilibrium state. The electron temperature of the plasma in the SE rim ($kT_e \sim 0.7$ keV) is found to be higher than the previously reported value. The power-law index from SE is nearly the same as, while that from the NE is larger than that of the West rim. The SNR age would be in the range of $(4-20)\times 10^3$ yr. Thus, 30 Dor C is likely to be the oldest shell-like SNR with non-thermal emission.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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