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arXiv 1306.1354astro-ph.HE
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从PAMELA数据推断cosmic ray质子的局域星际谱

Inferring the local interstellar spectrum of cosmic ray protons from PAMELA data

Francesco Loparco, Luca Maccione, Mario Nicola Mazziotta

摘要:

我们利用PAMELA探测器在2006-2009年期间收集的宇宙射线(CR)质子数据,推导出太阳系外的局部星际CR质子谱(LIS)。我们描述了CR质子在太阳系中的传播,通过一个详细的模型的电荷符号相关的漂移发生而CR扩散在不规则的太阳磁场。我们适合PAMELA数据的每一年的数据采集,并发现他们是很好地描述了一个独特的时间无关的LIS。然后,我们讨论的后果,这LIS星系传播模型。我们发现,扩散的再加速是强烈的约束,从而确认以前的结果来自不同的渠道。

英文摘要:

We take advantage of the cosmic-ray (CR) proton data collected by the PAMELA detector in several campaigns covering the period 2006-2009 to derive the local interstellar CR proton spectrum (LIS), outside the solar system. We describe the propagation of CR protons in the solar system by means of a detailed model of the charge-sign dependent drifts occurring while CRs diffuse in the irregular solar magnetic field. We fit PAMELA data for each year of data taking and find that they are well described by a unique time-independent LIS. We then discuss the consequences of this LIS on galactic propagation models. We find that diffusive reacceleration is strongly constrained, thus confirming previous results derived from different channels.

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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