Observations of the large-scale structure of the universe suggest inhomogeneities on scales between 100h-1 and 150h-1 Mpc (where h approximately 0.5-1 is the Hubble constant in units of 100 km.s-1.Mpc-1; 1 pc = 3.09 x 10(16) m). A deep redshift survey with a "pencil-beam" geometry of galaxies at the galactic poles indicated strong clustering, with a provocative regularity at 128h-1 Mpc [Broadhurst, T. J., Ellis, R. S., Koo, D. C. & Szalay, A. S. (1990) Nature (London) 343, 726-728]. Using newly acquired data, we demonstrate how multiple deep probes overcome most of the statistical problems associated with single pencil beams. Our results from cross correlations of multiple pencil beams, containing over 1200 galaxies, indicate that the strong peak in the power spectrum results from structures of large transverse size, in agreement with our original conjecture. We also discuss the sensitivity of pencil-beam surveys to the topology of large-scale structures and compare them with sparsely sampled wide-angle local surveys.
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机译:对宇宙大规模结构的观察表明,在100h-1和150h-1 Mpc之间的尺度上是不均匀的(其中h约0.5-1是哈勃常数,单位为100 km.s-1.Mpc-1; 1 pc = 3.09 x 10(16)m)。一项在银河极处具有“铅笔束”几何形状的星系的深层红移调查表明,该星团具有较强的聚集性,并在128h-1 Mpc时具有规律性[Broadhurst,TJ,Ellis,RS,Koo,DC&Szalay,AS(1990) Nature(London)343,726-728]。使用最新获得的数据,我们演示了多个深度探测器如何克服与单个笔形束相关的大多数统计问题。我们从包含1200多个星系的多个笔形光束的互相关中得出的结果表明,功率谱中的强峰来自横向尺寸较大的结构,这与我们最初的推测相符。我们还讨论了铅笔束测量对大型结构拓扑的敏感性,并将其与稀疏采样的广角局部测量进行比较。
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