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arXiv 0707.4647astro-ph
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超新星遗迹RX J1713 .7-3946中产生cosmic ray的模型与观测的比较

Comparing a model of cosmic ray production in the supernova remnant RX J1713.7-3946 with observations

E. G. Berezhko, H. J. Völk

摘要:

利用超新星遗迹(SNRs)中宇宙线(CR)加速的解释性含时非线性动力学理论研究了SNRXJ1713.7 -3946的性质。非热射电和X射线发射光谱以及早期HESS的观测非常高能量的$γ$射线发射的测量被用来约束系统的天文和粒子加速参数。该模型假设该天体是一颗具有大质量祖先的核心坍缩超新星(SN),年龄为$\approx 1600$ yr,距离为$\approx 1$ kpc。结果表明,有效地产生核CR,导致强激波修正和大的下游磁场强度$B_{\mathrm{d}}\sim100$ $μ$ G,可以再现观测到的从射电到X射线频率的同步辐射以及H.E.S.S.观测到的\gr光谱特性。望远镜在非热X射线中观察到的小尺度非线性结构为这种场放大情景提供了经验证实,这种情景导致逆康普顿和韧致辐射通量的强烈抑制。并与最新的H.E.S.S.意见。

英文摘要:

Explicitly time-dependent, nonlinear kinetic theory of cosmic ray (CR) acceleration in supernova remnants (SNRs) has been employed to investigate the properties of SNR RX J1713.7-3946. Observations of the nonthermal radio and X-ray emission spectra as well as earlier H.E.S.S. measurements of the very high energy $γ$-ray emission were used to constrain the astronomical and the particle acceleration parameters of the system. The model assumes that the object was a core collapse supernova (SN) with a massive progenitor, has an age of $\approx 1600$ yr and is at a distance of $\approx 1$ kpc. It is shown that an efficient production of nuclear CRs, leading to strong shock modification and a large downstream magnetic field strength $B_{\mathrm{d}}\sim100$ $μ$G, can reproduce the observed synchrotron emission from radio to X-ray frequencies together with the \gr spectral characteristics as observed by the H.E.S.S. telescopes. Small-scale filamentary structures observed in nonthermal X-rays provide empirical confirmation for this field amplification scenario which leads to a strong depression of the inverse Compton and Bremsstrahlung fluxes. The results are compared with the latest H.E.S.S. observations.

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