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.

这项研究的目的是通过使用非常高的能量（TEV）伽马射线来研究宇宙射线（CRS）的起源。 Cangaroo-II成像原子Cherenkov望远镜（IACT）已检测到银河中心和超新星残留物（SNR）RX J0852.0-4622的TEV伽马射线排放。我为无线电对TEV伽马射线的非热发射模型做出了贡献。这些物体的多频谱建模对于理解银河CR的颗粒加速度和传播是必要的。坎加罗团队引入了Fisher判别方法，用于无偏见的立体观察分析。坎加鲁 - III立体IACT证实了Vela Pulsar Wind Nebula的延长TEV伽玛射线发射，该发射由H.E.S.S.检测到。立体系统。我们还通过使用Chandra观察到Young SNR中的非热X射线细丝来对扩散冲击加速度进行限制。此外，我们讨论了CR光谱中PEV（膝盖）附近光谱中断的可能起源。我们假设假设的外乳外CR，并通过使用数值模拟来调查银河风的调节作用。我们发现，膝盖结构是通过造1调制的CR和源自SNR的银河系的叠加来重现的。

项目成果

Detection of Sub-TeV Gamma Rays from the Galactic Center Direction by CANGAROO-II

• DOI: 10.1086/421292
• 发表时间: 2004-03
• 期刊: The Astrophysical Journal Letters
• 作者: K. Tsuchiya;R. Enomoto;L. Ksenofontov;M. Mori;T. Naito;A. Asahara;G. Bicknell;R. Clay;Y. Doi;P. Edwards;S. Gunji;Satoshi Hara;T. Hara;T. Hattori;S. Hayashi;C. Itoh;S. Kabuki;F. Kajino;H. Katagiri;A. Kawachi;T. Kifune;H. Kubo;T. Kurihara;R. Kurosaka;J. Kushida;Y. Matsubara;Y. Miyashita;Y. Mizumoto;H. Moro;H. Muraishi;Y. Muraki;T. Nakase;D. Nishida;K. Nishijima;M. Ohishi;K. Okumura;J. Patterson;R. Protheroe;N. Sakamoto;K. Sakurazawa;D. Swaby;T. Tanimori;H. Tanimura;G. Thornton;F. Tokanai;T. Uchida;S. Watanabe;T. Yamaoka;S. Yanagita;T. Yoshida;T. Yoshikoshi

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

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

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巻
• 作者: H.Muraishi;S.Yanagita;T.Yoshida
• 通讯作者: T.Yoshida