在IRAM 30米望远镜上用NIKA2照相机对星系团进行高分辨率SZ成像
High-resolution SZ imaging of clusters of galaxies with the NIKA2 camera at the IRAM 30-m telescope
摘要：
星系团精确宇宙学的发展需要高角分辨率的Sunyaev-Zel'dovich（SZ）观测。到目前为止，角分分辨率的SZ观测（如SPT，ACT和普朗克）只允许详细研究低红移星系团（z<0.2）的内部介质。安装在IRAM 30米望远镜（Pico Veleta，西班牙）上的NIKA 2照相机具有宽视场（6.5弧分）和高角分辨率（150和260 GHz时分别为17.7和11.2弧秒），将为星系团SZ成像领域带来宝贵的信息。NIKA 2 SZ观测计划将使我们能够观测到红移在0.4和0.9之间的大样本星系团（50）。作为NIKA 2的一项试点研究，在IRAM 30米望远镜上用探路者NIKA观测了几个星系团，以涵盖NIKA 2的各种配置和观测条件。
英文摘要：
The development of precision cosmology with clusters of galaxies requires high-angular resolution Sunyaev-Zel'dovich (SZ) observations. As for now, arcmin resolution SZ observations (e.g. SPT, ACT and Planck) only allowed detailed studies of the intra cluster medium for low redshift clusters (z<0.2). With both a wide field of view (6.5 arcmin) and a high angular resolution (17.7 and 11.2 arcsec at 150 and 260 GHz), the NIKA2 camera installed at the IRAM 30-m telescope (Pico Veleta, Spain), will bring valuable information in the field of SZ imaging of clusters of galaxies. The NIKA2 SZ observation program will allow us to observe a large sample of clusters (50) at redshifts between 0.4 and 0.9. As a pilot study for NIKA2, several clusters of galaxies have been observed with the pathfinder, NIKA, at the IRAM 30-m telescope to cover the various configurations and observation conditions expected for NIKA2.
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