A Measurement of the Sunyaev-Zel'dovich Effect in the Coma Cluster of Galaxies
A Measurement of the Sunyaev-Zel'dovich Effect in the Coma Cluster of Galaxies
复制标题
星系团彗发中苏尼亚耶夫-泽尔多维奇效应的测量
DOI：
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发表时间：
1995
期刊：
影响因子：
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通讯作者：
S. Gulkis
中科院分区：
文献类型：
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作者：
T. Herbig;C. Lawrence;A. Readhead;S. Gulkis
我们报告了欧文斯谷射电天文台的 5.5 m 望远镜在后发星系团中探测到的 Sunyaev-Zel'dovich 效应。测得的宇宙微波背景温度的减量为 ΔT0,obs = -270 ± 29 μK。在校正离散射电源的影响并应用星团 X 射线大气的当前模型后，我们计算出影响的峰值为 ΔT0(0) = -505 ± 92 μK。使用相同的 X 射线模型，并假设气体大气呈球对称性，我们推导出哈勃常数 H0 = 71+ 30−25 km s-1 Mpc-1。这是首次在附近星系团中检测到苏尼亚耶夫-泽尔多维奇效应。
We report the detection of the Sunyaev-Zel'dovich effect in the Coma cluster of galaxies with the 5.5 m telescope at the Owens Valley Radio Observatory. The measured decrement of the temperature of the cosmic microwave background is ΔT0,obs = -270 ± 29 μK. After correcting for the effect of discrete radio sources and applying current models for the X-ray atmosphere of the cluster, we calculate the peak of the effect to be ΔT0(0) = -505 ± 92 μK. Using the same X-ray models, and assuming spherical symmetry for the gas atmosphere, we derive a Hubble constant of H0 = 71+ 30−25 km s-1 Mpc-1. This is the first detection of the Sunyaev-Zel'dovich effect in a nearby cluster of galaxies.