Measurement of the Sunyaev-Zel'dovich Effect toward Abell 2218 at 36 GHz
Measurement of the Sunyaev-Zel'dovich Effect toward Abell 2218 at 36 GHz
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36 GHz 下 Abell 2218 的 Sunyaev-Zeldovich 效应测量
DOI：
10.1093/pasj/50.1.169
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发表时间：
1998
影响因子：
2.3
通讯作者：
N. Kuno
中科院分区：
文献类型：
--
作者：
M. Tsuboi;A. Miyazaki;T. Kasuga;H. Matsuo;N. Kuno
利用Nobeyama 45-m望远镜，在36 GHz频率上对中等距离的cD星系团阿贝尔2218进行了Sunyaev-Zel'dovich效应的毫米波观测。在星团X射线辐射中心峰位处，宇宙微波背景辐射（CMB）的天线温降Δ T ε = -0.52 ± 0.15mK。假设星系团中的热气体具有等温性、球对称性，模型的密度分布，Sunyaev-Zel'dovich效应被推断为AT 0 RJ = -0.68 ±0.19 mK在Rayleigh-Jeans极限。这种Sunyaev-Zel'dovich效应和X射线表面亮度的组合表明哈勃常数为H 0（q 0 = 0.5）= 54± 1.5。|1 km s-1 Mpc-1。
We performed a millimeter-wav e Observation of the Sunyaev-Zel'dovich effect toward a moderately distant cD Cluster of galaxies, Abell 2218, at 36 GHz using the Nobeyama 45-m telescope. The antenna temperature decrement of the cosmic microwave background radiation (CMB) was measured to be AT£ = —0.52 ± 0.15 mK at the central peak position of X-ray emission in the Cluster. Assuming that the hot gas in the Cluster has isothermality, spherical symmetry, and the /?-model density distribution, the Sunyaev-Zel'dovich effect is inferred to be AT 0 RJ = —0.68 ±0.19 mK at the Rayleigh-Jeans limit. A combination of this Sunyaev-Zel'dovich effect and X-ray surface brightness suggests that the Hubble constant is H0{q0 = 0.5) = 54±|i km s" 1 Mpc"1.