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arXiv 0801.1770astro-ph
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2006年蛇夫座RS爆发中宇宙射线非线性扩散激波加速的证据

Evidence for Nonlinear Diffusive Shock Acceleration of Cosmic Rays in the 2006 Outburst of RS Ophiuchi

V. Tatischeff, M. Hernanz

摘要:

2006年RS Oph爆发的红外(IR)和X射线波长的光谱观测表明,冲击波减速的速度比标准测试粒子绝热冲击波模型预测的要高。观察到的爆炸波的演变可以解释,但是,由扩散冲击加速的粒子在向前冲击和随后逃逸的最高能量的离子从加速区域。非线性粒子加速也可以解释由红外和X射线数据推导出的激波速度的差异。我们讨论了在爆炸波的有效粒子加速光的新星遗迹的演变。

英文摘要:

Spectroscopic observations of the 2006 outburst of RS Oph at both infrared (IR) and X-ray wavelengths have shown that the blast wave has decelerated at a higher rate than predicted by the standard test-particle adiabatic shock-wave model. The observed blast-wave evolution can be explained, however, by the diffusive shock acceleration of particles at the forward shock and the subsequent escape of the highest energy ions from the acceleration region. Nonlinear particle acceleration can also account for the difference of shock velocities deduced from the IR and X-ray data. We discuss the evolution of the nova remnant in the light of efficient particle acceleration at the blast wave.

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