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High Energy Particle Acceleration at the Galactic Center Region

银河系中心区域的高能粒子加速

基本信息

批准号：
13304018
负责人：
KOYAMA Katsuji
金额：
$ 27.29万
依托单位：
Kyoto University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
2001
资助国家：
日本
起止时间：
2001 至 2004
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13304018/
关键词：
X-ray the Galactic center supernovae cosmic rays CCD cosmic jet referection nebula black hole

项目摘要

This research is the first sturdy of the high energy phenomenon at the Galactic center region by using X-ray emission lines (especially, iron) and non-thermal X-rays. This research is based on the discovery of X-ray plasmas extending 1°x2° in the Galactic center region and the ultra high temperature plasmas with the size of 2'x3' centering SgrA^*.The plasma pressure (the plasma temperature times the density) exceeds the two orders of that of the ISM, which suggests that the plasmas is not stationary but due to the sequential supernovae or a huge explosion at the Galactic center.Adding to the knowledge above, we newly achieved following results.(1)A lot of candidates for supernova remnants were newly discovered. This indicates the sequential supernova explosions for the past about 10,000 years at the Galactic center region.(2)Many non-thermal filament structures were newly discovered. These are the most important candidate for the origin of the highest energy Galactic cosmic rays, and it led to the study of the Galactic comic ray acceleration.(3)Non-thermal jet like knot straightly connecting to the Galactic center was discovered. The structure analysis showed that these knots have intermittently ejected in the past of about 1000 years.(4)A lot of new X-ray heavenly bodies and the X-ray reflection nebula candidates were discovered from the vicinity of the Galactic center, the characteristics of them were clarified, and the Galactic center was extremely active in the past of about 1000 years. This is consistent with the result of (3).(5)The development of CCD for the hard X-ray was advanced. A new method of extracting an X-ray event was developed witch improved a substantial sensitivity for high energy X-rays. We succeeded in technological development of stackable type CCD and N type CCD.

本研究首次利用X射线发射线（特别是铁）和非热X射线对银河系中心区的高能现象进行了证实。这项研究是基于银河系中心区域中延伸1°x2°的X射线等离子体和以SgrA^* 为中心的尺寸为2 'x3'的超高温等离子体的发现。（等离子体温度乘以密度）超过ISM的两个数量级，这表明等离子体并不是静止的，而是由于连续的超新星或银河系中心的巨大爆炸造成的。我们新取得了以下成果。(1)A新发现了许多超新星遗迹的候选者。这表明在过去的大约10,000年里，银河系中心区域发生了连续的超新星爆炸。（2）新发现了许多非热灯丝结构。这些是最高能量银河宇宙射线起源的最重要候选者，它导致了对银河漫画射线加速的研究。（3）发现了与银河系中心直线相连的非热喷流状结。结构分析表明，这些结在过去的大约1000年里间歇性地喷出。(4)A在银河系中心附近发现了许多新的X射线天体和X射线反射星云候选者，澄清了它们的特征，银河系中心在过去的近1000年里非常活跃。这与（3）的结果一致。（5）提出了硬X射线CCD的发展方向。提出了一种提取X射线事件的新方法，大大提高了对高能X射线的灵敏度。我们成功地开发了可堆叠型CCD和N型CCD。

项目成果

期刊论文数量（31）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

ASCA Discovery of Diffuse 6.4 KEV Emission near the Sagittarius C Complex : A New X-Ray Reflection Nebula

ASCA 在人马座 C 复合体附近发现漫射 6.4 KEV 发射：一个新的 X 射线反射星云

DOI：
发表时间：
2001
期刊：
The Astrophysical Journal 550
影响因子：
0
作者：
Hiroshi Murakami;Katsuji Koyama;Masahiro Tsujimoto;Yoshitomo Maeda;Masaaki Sakano
通讯作者：
Masaaki Sakano

Bamba, A., Ueno, M., Koyama, K., Yamauchi, S.: "Diffuse Hard X-Ray Sources Discovered with the ASCA Galactic Plane Survey"The Astrophysical Journal. 589. 253-260 (2004)

Bamba, A.、Ueno, M.、Koyama, K.、Yamauchi, S.：“ASCA 银河平面巡天发现的漫反射硬 X 射线源”《天体物理学杂志》。