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。
A calculation about the energy evolution of the relativistic particles in galaxy
clusters is presented. The heating of X-ray gas by radio gas in cluster PKS0745-191 is
derived through a combined analysis of Chandra data and VLA radio observations. It was
found that the heating of X-ray gas by radio gas is not enough to supply the energy lose by
the X-ray emission when the low energy cut-off in the power-law spectrum of the relativistic
electrons is set to 0.001erg. Therefore further computing is made to study the heating of
X--ray gas by radio gas with different low energy cut-off is computed and the low energy
cut--off values.
出处
《天文学报》
CSCD
北大核心
2004年第2期120-131,共12页
Acta Astronomica Sinica
基金
国家973和高能所创新课题
国家重点基础研究专项经费资助项目
关键词
星系团
射电连续谱
X射电气体
加热作用
galaxies: clusters: PKS 0745-191
X-rays: galaxies: clusters
radio continuam:galaxies