Research on cosmic-ray acceleration and propagation by using very high energy (TeV) gamma rays

这项研究的目的是通过使用高能（TeV）伽马射线来调查宇宙射线（CRs）的起源。CANGAROO-II成像大气切伦科夫望远镜（IACT）探测到来自银河系中心和超新星遗迹（SNR） RX J0852.0-4622的TeV伽马射线发射。我为建立无线电至tev伽马射线的非热发射模型做出了贡献。这些天体的多波段光谱建模对于理解星系cr的粒子加速和传播是必要的。CANGAROO团队引入了Fisher判别法，用于无偏置立体观察分析。CANGAROO-III立体IACT证实了船帆脉冲星风星云的扩展TeV伽马射线发射，这是由H.E.S.S.立体系统探测到的。我们还利用钱德拉对年轻信噪比中非热x射线细丝的观测，对扩散激波加速度进行了限制。此外，我们还讨论了CR光谱中PeV（膝部）附近光谱断裂的可能来源。我们假设了假想的星系外cr，并通过数值模拟研究了星系风对其调制的影响。我们发现膝状结构是由星系外调制的cr和源自信噪比的星系cr叠加而成的。

This purpose of this research is to investigate the origin of cosmic rays (CRs), by using very high energy (TeV) gamma rays. The CANGAROO-II Imaging Atomspheric Cherenkov Telescope (IACT) has detected TeV gamma-ray emissions from the Galactic Center and the supernova remnant (SNR) RX J0852.0-4622. I contribute to constructing the nonthermal emission models for radio-to-TeV gamma rays. The modeling of multiband spectra for these objects is necessary for understanding particle acceleration and propagation of the galactic CRs. The CANGAROO team introduced the Fisher discriminant method for bias-free stereoscopic observational analysis. And the CANGAROO-III stereoscopic IACT confirmed the extended TeV gamma-ray emission from the Vela pulsar wind nebula, which was detected by the H.E.S.S. stereoscopic system. We also put constraints on the diffusive shock acceleration by using the Chandra Observation of nonthermal X-ray filaments in young SNRs. Moreover, we discuss a possible origin of the spectral break near PeV (knee) in CR spectrum. We assume the hypothetical extragalactic CRs and investigate effects of their modulation by the galactic wind by using numerical simulations. We found that the knee structure is reproduced by a superposition of the extragalactic modulated CRs and the galactic ones originating from SNRs.