Combined Spectrum and Anisotropy Study of Cosmic Rays from the Vela SNR with CALET

由于船帆座信噪比的光谱和各向异性电子宇宙射线特征强烈依赖于宇宙射线的传播条件，因此人们投入了大量精力来改进底层的传播模型。通过比较测量的原子核宇宙谱与数值传播代码DRAGON的输出，采用随机行走优化方法确定了传播参数。该模型仅通过传播效应解释了实测核谱的差异，而不需要特定物种的加速机制，并且与实测核谱和主次比匹配良好。此外，建立了基于银河系随机采样的单个点源（SNR，脉冲星）的CALET全电子谱和AMS-02纯正电子谱解释模型，取代了遥远天体物理源贡献的现象学幂律参数化。这提供了源谱幂律指数和截断能量范围，因为需要解释远源光谱的较低能量部分，然后可以应用于约束Vela信噪比可能的源谱参数范围。传播模型和天体物理源解释已经（或即将）单独提出或在CALET间接暗物质搜索的背景下提出。计划将非分箱似然分析方法与研究计划中提出的逐事件各向异性分析相结合的工作正在进行中。

Since the spectral and anisotropy electron cosmic-ray signatures of the Vela SNR depend strongly on the cosmic-ray propagation conditions, strong effort was put into improving the underlying propagation model. The propagation parameters are determined in a random walk optimization by comparing measured nuclei cosmic spectra with the output of the numerical propagation code DRAGON. The developed model explains the differences in the measured nuclei spectra by propagation effects only, without the need for species-specific acceleration mechanisms, and matches well the measured nuclei spectra as well as primary-secondary ratios.Furthermore, an interpretation model for the all-electron spectrum by CALET and positron-only spectrum by AMS-02 based on randomly sampled individual point sources (SNR, pulsars) throughout the galaxy was developed, replacing the phenomenological power-law parameterization for the contribution from distant astrophysical sources. This provides the source spectrum power-law index and cutoff energy ranges allowed by the need to explain the lower energy parts of the spectra by the distant sources, which then can be applied to constrain the range of possible source-spectrum parameters for the Vela SNR.The propagation model and astrophysical source interpretation have been (or will soon be) presented on their own or in the context of indirect dark matter search with CALET. Work on the planned combination of the un-binned likelihood analysis method with the event-by-event anisotropy analysis presented in the research plan is ongoing.