论文标题
宇宙射线钠和铝的光谱以及意外的铝过量
Spectra of Cosmic Ray Sodium and Aluminum and Unexpected Aluminum Excess
论文作者
论文摘要
自推出以来，Alpha磁性光谱仪-02（AMS-02）已经对宇宙射线（CR）物种的光谱进行了出色的质量测量，$ \ bar {p} $，$ e^{\ pm pm} $和nuclei（H-Si，fe）导致了许多突破性的突破。最新的AMS-02结果是测量CR钠和铝的光谱高达$ \ sim $ 2电视。鉴于它们的低太阳系丰度，每种元素的很大一部分是在较重物种的碎片中产生的，主要是NE，MG和Si。在本文中，我们使用AMS-02对钠和铝光谱的精确测量以及Ace-Cris和Voyager 1数据来测试其起源。我们表明，钠光谱与Galprop-Helmod框架所做的预测非常吻合，而铝光谱显示出2-7 GV的刚度范围显着过多。在这种情况下，我们讨论了LI，F和FE中其他低能过量过量的起源。观察到的LI，F和Al中观察到的过剩似乎与当地的Wolf-rayet（WR）星星假设一致，被调用以再现异常的$^{22} $ ne/$ ne/$ ne/$ ne/$ ne/$ ne/$^{20} $ ne，$^{12} $ c/$ c/$ c/$ c/$^{16}} $ o，以及$^{58} $ cr/$ fe {58 cr/cr/cr/cr/cr/cr/cr/cr/cr/cr/cr/cr/cr in criat cr/cr/cr in criat in cr/cr/cr in 56与太阳能社区的过去SN活动相连。我们还提供了更新的钠和铝的局部星际光谱（LIS），距离很少MV到$ \ sim $ 2电视。我们的计算采用了自以为是的Galprop-Helmod框架，该框架已被证明是衍生Cr $ \ bar {p} $，$ e^{ - } $和nuclei $ z \ le28 $的可靠工具。
Since its launch, the Alpha Magnetic Spectrometer-02 (AMS-02) has delivered outstanding quality measurements of the spectra of cosmic-ray (CR) species, $\bar{p}$, $e^{\pm}$, and nuclei (H-Si, Fe), which resulted in a number of breakthroughs. The most recent AMS-02 result is the measurement of the spectra of CR sodium and aluminum up to $\sim$2 TV. Given their low solar system abundances, a significant fraction of each element is produced in fragmentations of heavier species, predominantly Ne, Mg, and Si. In this paper, we use precise measurements of the sodium and aluminum spectra by AMS-02 together with ACE-CRIS and Voyager 1 data to test their origin. We show that the sodium spectrum agrees well with the predictions made with the GalProp-HelMod framework, while aluminum spectrum shows a significant excess in the rigidity range from 2-7 GV. In this context, we discuss the origin of other low-energy excesses in Li, F, and Fe found earlier. The observed excesses in Li, F, and Al appear to be consistent with the local Wolf-Rayet (WR) stars hypothesis, invoked to reproduce anomalous $^{22}$Ne/$^{20}$Ne, $^{12}$C/$^{16}$O, and $^{58}$Fe/$^{56}$Fe ratios in CRs, while excess in Fe is likely connected with a past SN activity in the solar neighborhood. We also provide updated local interstellar spectra (LIS) of sodium and aluminum in the rigidity range from few MV to $\sim$2 TV. Our calculations employ the self-consistent GalProp-HelMod framework that has proved to be a reliable tool in deriving the LIS of CR $\bar{p}$, $e^{-}$, and nuclei $Z\le28$.
