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

利用甚高能（TeV）伽马射线研究宇宙线加速和传播

• 批准号: 16540209
• 负责人: YOSHIDA Tatsuo
• 金额: $ 1.02万
• 依托单位: Ibaraki University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2004
• 资助国家: 日本
• 起止时间: 2004 至 2005
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-16540209/
• 关键词: Very high energy (TeV) gamma rays; Particle acceleration; Origin of cosmic rays; Supernova remnants (SNRs); Galactic center; 宇宙系加速; 宇宙線の期限; RX 0852.0-4622

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.

本研究的目的是通过使用非常高能量（TeV）的伽马射线来研究宇宙射线（CR）的起源。CANGAROO-II成像大气切伦科夫望远镜（IACT）探测到了来自银河系中心和超新星遗迹（SNR）RX J0852.0-4622的TeV伽马射线辐射。我有助于建立非热辐射模型的射电到TeV的伽马射线。这些物体的多波段光谱建模对于了解银河系CR的粒子加速和传播是必要的。CANGAROO团队介绍了Fisher判别法用于无偏差立体观测分析。CANGAROO-III立体IACT证实了来自船帆座脉冲星风星云的扩展TeV伽马射线发射，这是由H.E.S.S.探测到的。立体系统我们还把约束的扩散冲击加速使用钱德拉观测的非热X射线细丝在年轻的信噪比。此外，我们还讨论了CR谱中PeV（膝）附近谱突变的可能来源。我们假设的河外CRs和调查的影响，其调制的银河风通过使用数值模拟。我们发现，膝状结构是由河外调制的CR和银河系的起源于SNRs的叠加再现。

项目成果

Galactic Modulation of Extragalactic Cosmic Rays: Possible Origin of the Knee in the Cosmic Ray Spectrum

河外宇宙线的银河调制：宇宙线光谱中膝盖的可能起源

• 发表时间: 2005
• 期刊: Progress of Theoretical Physics 113
• 作者: H.Murashi;S.Yanagita;T.Yoshida
• 通讯作者: T.Yoshida

Constraints on the diffusive shock acceleration from the nonthermal X-ray thin shells in SN1006NE rim

SN1006NE轮缘非热X射线薄壳扩散激波加速度约束

• 发表时间: 2004
• 期刊: Astron.Astrophys. 416
• 作者: R.Yamazak;T.Yoshida;T.Terasawa;A.Bamba;K.Koyama
• 通讯作者: K.Koyama

Detection of Gamma Rays around 1 TeV from RX J0852.0–4622 by CANGAROO-II

• DOI: 10.1086/427980
• 发表时间: 2004-12
• 期刊: The Astrophysical Journal Letters
• 作者: H. Katagiri;R. Enomoto;L. Ksenofontov;M. Mori;Y. Adachi;A. Asahara;G. Bicknell;R. Clay;Y. Doi-Y

A Spatial and Spectral Study of Nonthermal Filaments in Historical Supernova Remnants: Observational Results with Chandra

• DOI: 10.1086/427620
• 发表时间: 2004-11
• 期刊: The Astrophysical Journal
• 作者: A. Bamba;R. Yamazaki;T. Yoshida;T. Terasawa;K. Koyama

A Search for Sub -TeV Gamma Rays form the Vela Pulsar Region with CANGAROO-III

用 CANGAROO-III 搜索船帆脉冲星区域的 Sub-TeV 伽马射线

• 发表时间: 2006
• 期刊: The Astrophysical Journal 638
• 作者: R.Enomoto;K.Tsuchiya;CANGAROO collaboration;T.Yoshida
• 通讯作者: T.Yoshida