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arXiv 0806.1490astro-ph
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用Suzaku研究SNR RX J1713 .7-3946的非热发射

Study of Nonthermal Emission from SNR RX J1713.7-3946 with Suzaku

Takaaki Tanaka, Yasunobu Uchiyama, Felix A. Aharonian, Tadayuki Takahashi, Aya Bamba, Junko S. Hiraga, Jun Kataoka, Tetsuichi Kishishita, Motohide Kokubun, Koji… 展开作者

Takaaki Tanaka, Yasunobu Uchiyama, Felix A. Aharonian, Tadayuki Takahashi, Aya Bamba, Junko S. Hiraga, Jun Kataoka, Tetsuichi Kishishita, Motohide Kokubun, Koji Mori, Kazuhiro Nakazawa, Robert Petre, Hiroyasu Tajima, Shin Watanabe

摘要:

本文介绍了朱雀卫星对超新星遗迹RX J1713.7-3946的一系列观测结果。观测覆盖了残骸表面的三分之二。我们成功地检测到硬X射线高达~ 40 keV从每个指向。硬X射线谱由幂律函数描述,光子指数为~ 3.0,大于10 keV以下能量区域的光子指数。空间积分的XIS和HXD谱的连接清楚地揭示了在0.4- 40 keV X射线谱中的谱截止。这个截止被解释为对应于发射同步辐射的电子的最大加速能量。Suzaku的宽带覆盖首次使我们能够导出截止区的母电子谱,这与理论预测吻合得很好。在空间积分X射线光谱中推断出的截止能量表明,残骸中的粒子加速是如此有效,以至于几乎达到了理论极限,即所谓的玻姆极限。基于朱雀的数据,我们提出了多波长的研究结果,从光谱和形态的观点。光谱能量分布有利于强子的情况下,而不是轻子的情况下。对于形态学研究,我们比较了来自朱雀XIS和H.E.S.S.的表面亮度图。望远镜我们证实了X射线和TeV γ射线发射之间的强相关性。除了相关性之外,我们还发现在明亮的西部边缘区域,X射线发射比一般X射线与伽马射线相关性所预期的要亮。

英文摘要:

We present results obtained from a series of observations of the supernova remnant RX J1713.7-3946 by the Suzaku satellite. The observations cover about two-thirds of the remnant surface. We successfully detected hard X-rays up to ~ 40 keV from each pointing. The hard X-ray spectra are described by power-law functions with photon indices of ~ 3.0, which are larger than those in the energy region below 10 keV. Connection of the spatially-integrated XIS and HXD spectra clearly reveals a spectral cutoff in the 0.4--40 keV X-ray spectrum. This cutoff is interpreted to correspond to the maximum acceleration energy of electrons emitting synchrotron radiation. The wide-band coverage of Suzaku for the first time allows us to derive the parent electron spectrum in the cutoff region, which shows good agreement with theoretical predictions. The inferred cutoff energy in the spatially-integrated X-ray spectrum indicates that particle acceleration in the remnant is so efficient that it is almost at the theoretical limit, the so-called Bohm limit. Based on the Suzaku data, we present results of multi-wavelength studies from spectral and morphological points of view. The spectral energy distribution favors the hadronic scenario rather than the leptonic scenario. For the morphology studies, we compare the surface brightness maps from the Suzaku XIS and the H.E.S.S. telescope. We confirm the strong correlation between X-ray and TeV gamma-ray emission. In addition to the correlation, we found that in the bright western rim regions the X-ray emission is brighter than expected from the general X-ray to gamma-ray correlation.

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