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arXiv 1002.3341astro-ph.HE
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用AMS-02实验精确定位Cosmic Ray传播

Pinpointing Cosmic Ray Propagation With The AMS-02 Experiment

Miguel Pato, Dan Hooper, Melanie Simet

摘要:

阿尔法磁谱仪(AMS-02)计划于今年晚些时候部署在国际空间站上,将能够以前所未有的精度测量GeV-TeV宇宙射线的成分和光谱。在本文中,我们研究了AMS-02的稳定的次级-初级和不稳定的比率(如硼-碳和铍-10-铍-9)的预测测量如何限制用于描述整个银河系中宇宙射线传播的模型。我们发现,在相当简单的传播模型的上下文中,所有的模型参数可以确定高精度从预计AMS-02数据。然而,在更复杂的情况下,这种测量的限制性较小,例如,这种情况允许扩散系数偏离幂律形式,或宇宙射线源的分布和化学丰度不均匀或随机。

英文摘要:

The Alpha Magnetic Spectrometer (AMS-02), which is scheduled to be deployed onboard the International Space Station later this year, will be capable of measuring the composition and spectra of GeV-TeV cosmic rays with unprecedented precision. In this paper, we study how the projected measurements from AMS-02 of stable secondary-to-primary and unstable ratios (such as boron-to-carbon and beryllium-10-to-beryllium-9) can constrain the models used to describe the propagation of cosmic rays throughout the Milky Way. We find that within the context of fairly simple propagation models, all of the model parameters can be determined with high precision from the projected AMS-02 data. Such measurements are less constraining in more complex scenarios, however, which allow for departures from a power-law form for the diffusion coefficient, for example, or for inhomogeneity or stochasticity in the distribution and chemical abundances of cosmic ray sources.

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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