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| 星系团PKS 0745-191中射电气体对X射线气体的加热 | |
| 引用本文： | 向飞,陈勇,吴枚,卢方军,宋黎明,贾淑梅. 星系团PKS 0745-191中射电气体对X射线气体的加热[J]. 天文学报, 2004, 45(2): 120-131 |
| 作者姓名： | 向飞 陈勇 吴枚 卢方军 宋黎明 贾淑梅 |
| 作者单位： | 中国科学院高能物理研究所粒子天体物理研究中心,北京,100039 |
| 基金项目： | 国家973和高能所创新课题及国家重点基础研究专项经费资助项目 |
| 摘 要： | 对星系团中相对论性粒子的能量演化做了数值计算，在此基础上，联合分析Chandra卫星数据和VLA射电观测结果，计算了星系团PKS0745-191中高能射电气体对X射线气体的加热作用，发现在射电气体幂律谱能量下限为0.001erg时，射电气体对X射线气体的加热不足以补充X射线气体的辐射能损．然后在计算研究了不同能量下限时射电气体对X射线气体的加热作用，并估计了射电气体的能量下限． |
| 关 键 词： | 星系团 射电连续谱 X射电气体 加热作用 |
| 修稿时间： | 2003-10-17 |
The Heating of X-ray Gas by Radio Gas in Cluster PKS0745-191 |
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| XIANG Fei,CHEN Yong,WU Mei,LU Fang-jun,SONG Li-ming,JIA Shu-mei Particle Astrophysics Center Institute of High Energy Physics Chinese Academy of Sciences Beijing. The Heating of X-ray Gas by Radio Gas in Cluster PKS0745-191[J]. Acta Astronomica Sinica, 2004, 45(2): 120-131 | |
| Authors: | XIANG Fei CHEN Yong WU Mei LU Fang-jun SONG Li-ming JIA Shu-mei Particle Astrophysics Center Institute of High Energy Physics Chinese Academy of Sciences Beijing |
| Affiliation: | XIANG Fei;CHEN Yong;WU Mei;LU Fang-jun;SONG Li-ming;JIA Shu-mei Particle Astrophysics Center Institute of High Energy Physics Chinese Academy of Sciences Beijing 100039 |
| Abstract: | A calculation about the energy evolution of the relativistic particles in galaxyclusters is presented. The heating of X-ray gas by radio gas in cluster PKS0745-191 isderived through a combined analysis of Chandra data and VLA radio observations. It wasfound that the heating of X-ray gas by radio gas is not enough to supply the energy lose bythe X-ray emission when the low energy cut-off in the power-law spectrum of the relativisticelectrons is set to 0.001erg. Therefore further computing is made to study the heating ofX--ray gas by radio gas with different low energy cut-off is computed and the low energycut--off values. |
| Keywords: | galaxies: clusters: PKS 0745-191 X-rays: galaxies: clusters radio continuam:galaxies |
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