The Study of the Highest Energy Cosmic Ray

最高能量宇宙线的研究

基本信息

批准号：
07247102
负责人：
TESHIMA Masahiro
金额：
$ 165.31万
依托单位：
The University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research on Priority Areas
财政年份：
1995
资助国家：
日本
起止时间：
1995 至 1998
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-07247102/
关键词：
Cosmic Ray Gamma Ray Carenkov light Air Fluorescence light Super Nova Active Galactic Nuclei Telescope 宇宙超新星残骸宇宙線起源空気シャワー大気シンチレーション光カニ星雲レーザー

项目摘要

The main purpose of this project is to investigate the origin of cosmic rays by measuring the highest energy cosmic rays and high energy gamma rays precisely. The Cerenkov light and Air fluorescence light from cosmic ray air showers can be measured by the Utah Seven Telescopes Array in optical method. The tracks of air showers is recorded by the telescopes of large diameter and their geometrical structures give us many informations, and the energy and arrival direction can be determined with high accuracy.Since 1995, we have developped the telescope. Two telescopes were installed at Akeno Observatory in Japan and the fundamental performance was examined. The construction of seven telescopes array at Utah, USA was completed in 1998 after three years effort.The significant results obtained from this Utah Seven Telescope Array are as follows. The high energy gamma rays from Crab Nebula, AGN Mrk421, Mrk501 and IES1959 were successfully observed. Especially, the in the observation of Mrk501, we have discovered the existence of the kink in the energy spectrum around 5-7 TeV andI the periodicity of 24days in the gamma ray intensities. The object IES1959 were identified as a TeV gamma ray sources by our observations. For the study of the highest energy cosmic rays, we have shoot the laser beam in the atmosphere and simulated the air showers. These images were observed by telescopes at a distance of 22km and the sensitivity for the highest energy cosmic rays by the Utah Seven Telescope Array were evaluated.

该项目的主要目的是通过精确测量最高能量宇宙射线和高能伽马射线来研究宇宙射线的起源。宇宙射线阵雨的Cerenkov灯光和空气荧光可以通过犹他州七个望远镜阵列测量光学方法。大直径的望远镜记录了空气淋浴的轨道，它们的几何结构为我们提供了许多信息，并且可以高精度确定能量和到达方向。从1995年开始，我们已经开发了望远镜。在日本的Akeno天文台安装了两个望远镜，并检查了基本性能。经过三年的努力，在1998年完成了美国犹他州七个望远镜阵列的建设。从该犹他州七个望远镜阵列获得的显着结果如下。成功观察到了来自蟹状星云的高能量伽马射线，AGN MRK421，MRK501和IES1959。尤其是在观察MRK501的观察中，我们在5-7 Tev Andi左右的能量谱中发现了脉动的存在，伽马射线强度为24天的周期性。通过我们的观察结果将对象IES1959鉴定为TEV伽马射线。为了研究最高的能量宇宙射线，我们已经在大气中拍摄了激光束并模拟了空中阵雨。通过望远镜在22公里处观察到这些图像，并评估了犹他州七个望远镜阵列对最高能量宇宙射线的敏感性。