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星系团PKS0745-191中射电气体对X射线气体的加热 被引量:1

The Heating of X-ray Gas by Radio Gas in Cluster PKS0745-191
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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
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