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首页> 外文会议>2004 Asia-Pacific Radio Science Conference Proceedings >Observations of Sunyaev-Zel'dovich Effect with Nobeyama 45-m telescope
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Observations of Sunyaev-Zel'dovich Effect with Nobeyama 45-m telescope

机译：野山山45米望远镜对桑雅耶夫-泽洛维奇效应的观测。

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We have three focal plane array receiver systems in the Nobeyama Radio Observatory 45-m radio telescope. These are S40M at 40 GHz, BEARS at 100 GHz, and NOBA at 150 GHz. A focal plane array receiver system at mm wavelength is superior to a single receiver system in sensitivity and also the power of reducing atmospheric effects. The telescope and these array receivers cover the wide frequency range of Rayleigh-Jeans region of the Sunyaev-Zel'dovich (S-Z) effect. The 45-m telescope is one of most powerful tool for the observation of S-Z effect. (2) We have performed the ON-OFF observation of the S-Z effect toward eight X-ray bright galaxy clusters from z = 0.18 to 0.55 at 43 GHz using S40M as a pilot survey. The S-Z effects were detected for all clusters as temperature decrement of 0.5 - 1mK at the center. The Hubble constant is estimated to be H_0 = 64 ± 17km/s/Mpc for a flat ΛCDM cosmology, which shows good agreement with the values by other S-Z effect observations. (3) The mapping observations of S-Z effect are on-going. Although most of the observed images are roughly described by the isothermal spherical β-model density distribution, the deviation from the model seems to be large for the clusters with the irregularity in the X-ray image rather than those without it.
机译：我们在Nobeyama Radio Observatory 45米射电望远镜中拥有三个焦平面阵列接收器系统。它们是40 GHz的S40M，100 GHz的BEARS和150 GHz的NOBA。毫米波长的焦平面阵列接收器系统在灵敏度以及减少大气影响方面都优于单个接收器系统。望远镜和这些阵列接收器覆盖了Sunyaev-Zel'dovich（S-Z）效应的Rayleigh-Jeans地区的宽频率范围。 45米望远镜是观察S-Z效果的最强大工具之一。 （2）我们使用S40M作为先导测量，对在43 GHz下从z = 0.18至0.55的八个X射线亮星系星团进行S-Z效应的开-关观测。当中心温度降低0.5-1mK时，检测到所有簇的S-Z效应。对于平坦的ΛCDM宇宙学，哈勃常数估计为H_0 = 64±17km / s / Mpc，这与其他S-Z效应观测值显示出很好的一致性。 （3）正在进行S-Z效应的制图观测。尽管大多数观察到的图像由等温球形β模型密度分布大致描述，但是对于X射线图像中具有不规则性的簇，而不是没有X射线的模型，其与模型的偏差似乎很大。

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