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arXiv 1005.4699astro-ph.CO
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Abell 1835中1.1 mm波长Sunyaev-Zel'dovich增量的高信噪比图

A high signal to noise ratio map of the Sunyaev-Zel'dovich increment at 1.1 mm wavelength in Abell 1835

Piers Horner, Philip Mauskopf, James Aguirre, Jamie Bock, Eiichi Egami, Jason Glenn, Sunil Golwala, Glenn Laurent, Hien Nguyen, Jack Sayers

摘要:

我们提出了一个8角分的直径地图周围的星系团阿贝尔1835从抖动的地图观测波长为1.1毫米,使用安装在加州理工学院亚毫米天文台(CSO)的测辐射热相机(Bolocam)的分析。该数据是很好地描述了一个模型,包括一个扩展的Sunyaev-Zel'dovich(SZ)的信号从集群气体加上发射从两个明亮的背景submm星系放大的引力透镜的集群。星团中心康普顿值的最佳拟合值和场中两个主要点源的通量:SMM J140104+0252和SMM J14009+0252分别为$y_{0}=(4.34\pm0.52\pm0.69)\times10^{-4}$、6.5 $\pm{2.0}\pm0.7$ mJ y和11.3 $\pm{1.9}\pm1.1$ mJ y,其中第一误差表示统计测量误差,第二误差表示结果中的估计系统误差。这个测量假设存在的尘埃排放从集群的中央cD星系的$1.8\pm0.5$ mJy,根据更高的频率观测阿贝尔1835。集群图像代表了迄今为止在热SZ光谱的正区域中的集群的最高意义的SZ检测之一。推断的中心强度进行比较,其他SZ测量的Abell 1835和收集的结果是用来获得值的$y_{0} = (3.60\pm0.24)\times10^{-4}$和集群特有的速度$v_{z} = -226\pm275$公里/秒。

英文摘要:

We present an analysis of an 8 arcminute diameter map of the area around the galaxy cluster Abell 1835 from jiggle map observations at a wavelength of 1.1 mm using the Bolometric Camera (Bolocam) mounted on the Caltech Submillimeter Observatory (CSO). The data is well described by a model including an extended Sunyaev-Zel'dovich (SZ) signal from the cluster gas plus emission from two bright background submm galaxies magnified by the gravitational lensing of the cluster. The best-fit values for the central Compton value for the cluster and the fluxes of the two main point sources in the field: SMM J140104+0252, and SMM J14009+0252 are found to be $y_{0}=(4.34\pm0.52\pm0.69)\times10^{-4}$, 6.5$\pm{2.0}\pm0.7$ mJy and 11.3$\pm{1.9}\pm1.1$ mJy, where the first error represents the statistical measurement error and the second error represents the estimated systematic error in the result. This measurement assumes the presence of dust emission from the cluster's central cD galaxy of $1.8\pm0.5$ mJy, based on higher frequency observations of Abell 1835. The cluster image represents one of the highest-significance SZ detections of a cluster in the positive region of the thermal SZ spectrum to date. The inferred central intensity is compared to other SZ measurements of Abell 1835 and this collection of results is used to obtain values for $y_{0} = (3.60\pm0.24)\times10^{-4}$ and the cluster peculiar velocity $v_{z} = -226\pm275$ km/s.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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