Development of an Advanced Heterogeneous Array for Probing the High-Redshift Universe

abstract: 0096913这个项目是建立并使用一个由6个直径3.5m的射电望远镜组成的干涉阵列来成像星系团中的Sunyaev Zel'dovich （SZ）效应。该阵列将通过对星系团进行完整的、与红移无关的盘存，为高红移时的宇宙结构形成提供一种新的视角。它将获得哈勃常数H0、减速参数q0和宇宙物质密度WM的独立估计。然后，这些测量将导致对宇宙总能量密度和宇宙常数的贡献的独立约束。在对星团进行初步调查后，新的阵列将与欧文斯谷毫米阵列（Owens Valley Millimeter array）的6个10米天线一起使用，并可能最终成为CARMA（毫米天文学联合阵列）的一部分，形成一个具有许多优势的异构阵列，用于对一般天文现象进行高空间动态范围成像。SZ测量完成后，该阵列将提供给美国天文学界。＊＊＊

ABSTRACTAST-0096913This program is to build and use an interferometric array of six 3.5m diameter radio telescopes to image the Sunyaev Zel'dovich (SZ) effect in clusters of galaxies. The array will be used to provide a new view of cosmic structure formation at high redshifts by taking a complete, redshift-independent inventory of galaxy clusters. It will obtain independent estimates of the Hubble Constant H0, the deceleration parameter q0, and the cosmological matter density WM. These measurements will then lead to independent constraints on the total energy density of the universe and the contribution from a cosmological constant. The new array, after its initial survey of clusters, will be used in conjunction with the Owens Valley Millimeter Array of six 10m antennas, and perhaps eventually as part of CARMA (Combined Array for Millimeter Astronomy), to form a heterogeneous array with many advantages for high spatial dynamic range imaging of general astronomical phenomena. After the SZ measurements are completed the array will be made available to the US astronomical community. ***