Thermal bremsstrahlung processes for the high temperature plasmas in galaxy clusters

星系团中高温等离子体的热韧致辐射过程

• 批准号: 15540293
• 负责人: NOZAWA Satoshi
• 金额: $ 1.79万
• 依托单位: Josai Junior College
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2003
• 资助国家: 日本
• 起止时间: 2003 至 2005
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15540293/
• 关键词: galaxy clusters; plasmas; thermal bremsstrahlung; gaunt factor; relativistic corrections; Sunyaev-Zeldovich effect; CMB radiation; 熱制動輻射過程; Gaunt因子

We have studied the following two subjects for the high-temperature plasmas in the galaxy clusters.(1)Sunyaev-Zeldovich effect for clusters of galaxiesThe cosmic microwave background (CMB) radiation spectrum is distorted by the Compton scattering of the electrons in the clusters of galaxies. This effect is called as the thermal Sunyaev-Zeldovich (SZ) effect. In the present study we have extended the previous study on this subject. In 2003 we have derived an analytic expression for the thermal SZ effect which is applicable to extremely hot plasmas of galaxy clusters. In 2003 we have also extended the SZ effect by including the effect of the motion of the observer (earth). Both of the results were published in the refereed journals (Astronomy & Astrophysics).(2)Thermal bremsstrahlung for the intracluster plasmaThe thermal bremsstrahlung processes of the electons by ions and/or electrons in the intracluster plasmas are the main processes for producing the X-rays. In the present study we have performed the detailed calculations for the processes including the relativistic corrections. In particular, we have calculated the electron-electron bremsstrahlung processes including the relativistic corrections.

我们对星系团中的高温等离子体进行了以下两个方面的研究：(1)星系团的Sunyaev-Zeldovich效应宇宙微波背景(CMB)辐射光谱被星系团中电子的康普顿散射所扭曲。这种效应被称为太阳热效应(SZ)。在本研究中，我们扩展了以前对这一主题的研究。2003年，我们推导出了适用于星系团极热等离子体的热SZ效应的解析表达式。2003年，我们还扩展了SZ效应，将观测者(地球)的运动效应包括在内。这两个结果都发表在参考期刊(天文学和天体物理学)上。(2)星系团内等离子体的热韧致辐射星系团内等离子体中的离子和/或电子对电子的热韧致辐射过程是产生X射线的主要过程。在本研究中，我们对包括相对论修正在内的过程进行了详细的计算。特别地，我们计算了包含相对论修正的电子-电子韧致辐射过程。

项目成果

Ion-Ion correlation effect on the neutrino-nucleus scattering in supernova cores

离子-离子相关效应对超新星核心中微子-核散射的影响

• 发表时间: 2004
• 期刊: The Astrophysical Journal 611
• 作者: S.Nozawa;N.Itoh;Y.Kohyama;N.Itoh et al.
• 通讯作者: N.Itoh et al.

S.Wanajo et al.: "The r-process in supernova explosions from the collapse of O-Ne-Mg cores"The Astrophysical Journal. 593. 968-979 (2003)

S.Wanajo 等人：“O-Ne-Mg 核心塌陷导致的超新星爆炸中的 r 过程”《天体物理学杂志》。

The r-process in the neutrino wind and U-Th cosmochronology

中微子风中的 r 过程和 U-Th 宇宙年代学

• 发表时间: 2003
• 期刊: Nuclear Physics A718
• 作者: S.Wanajo;N.Itoh;Y.Ishimaru;S.Nozawa;T.C.Beers
• 通讯作者: T.C.Beers

Relativistic corrections to the SZ effect for extremely hot clusters of galaxies

对极热星系团 SZ 效应的相对论修正

• 发表时间: 2004
• 期刊: Astronomy & Astrophysics 417
• 作者: Itoh;Nozawa
• 通讯作者: Nozawa

The r-Process in Supernova Explosions from the Collapse of O-Ne-Mg Cores

• DOI: 10.1086/376617
• 发表时间: 2003-02
• 期刊: The Astrophysical Journal
• 作者: S. Wanajo;M. Tamamura;N. Itoh;K. Nomoto;Y. Ishimaru;T. Beers;S. Nozawa