X-radiation from clusters of galaxies - Spectral evidence for a hot evolved gas
X-radiation from clusters of galaxies - Spectral evidence for a hot evolved gas
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来自星系团的 X 辐射 - 热演化气体的光谱证据
DOI：
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发表时间：
1976
期刊：
影响因子：
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通讯作者：
J. Swank
中科院分区：
文献类型：
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作者：
P. Serlemitsos;B. Smith;E. Boldt;S. Holt;J. Swank
OSO-8观测到室女座、英仙座和后发座星系团在2至60 keV范围内的X射线通量，为辐射的热起源提供了强有力的证据，包括铁线发射。这些数据充分描述了从一个等温等离子体发射的铁丰度接近协议与宇宙水平。幂律描述通常不太被接受，在英仙座的情况下被排除在外。团簇气体的起源的影响进行了讨论。
OSO-8 observations of the X-ray flux in the range between 2 and 60 keV from the Virgo, Perseus, and Coma clusters provide strong evidence for the thermal origin of the radiation, including iron-line emission. The data are adequately described by emission from an isothermal plasma with an iron abundance in near agreement with cosmic levels. A power-law description is generally less acceptable and is ruled out in the case of Perseus. Implications of the origin of the cluster gas are discussed.