Wide Field Observations of Weak Gravitatinal Lensing Using the UH 8192x8192 CCD Mosaic Camera

AST 95-29274 PI：Gerard Luppino 用UH 8192 × 8192 CCD镶嵌相机进行弱引力透镜的宽视场观测 拟议的观测资金旨在利用弱引力透镜在星系团和更大尺度上绘制暗物质。该计划将利用专门为透镜研究建造的仪器的独特访问：新的UH 8192 x8192 CCD镶嵌相机。马赛克是一个紧密排列的4x 2 CCD阵列，具有15 um像素，提供0.47度宽视野。意见将集中在两个方面。第一个是获得红移在0.1和1之间的星系团的宽视场图像，从而探测大半径的星系团暗物质分布。对于两个具有巨大弧的星团，现有的HST图像可用，质量剖面重建将扩展到核心，提供证据以帮助区分各种暗物质模型。第二个观测计划是用V和I两种颜色进行深度测量，覆盖10度平方的区域，以寻找宇宙大尺度结构的弱透镜效应，并直接测量质量功率谱P（k）。迄今为止，这种搜索受到狭窄视野的严重限制。该仪器将在三年内测量约1-2百万个星系的位置，形状，大小和颜色。

AST 95-29274 PI: Gerard Luppino Wide Field Observations of Weak Gravitational Lensing Using the UH 8192 x 8192 CCD Mosaic Camera The proposed observational funding is aimed at mapping dark matter on cluster and larger scales using weak gravitational lensing. The program will exploit unique access to an instrument built specifically for lensing studies: the new UH 8192x8192 CCD mosaic camera.. The mosaic is a close-packed 4x2 array of CCDs with 15 um pixels providing a 0.47 deg wide field of view. The observations will concentrate on two areas. The first is to obtain wide field images of clusters of galaxies spanning redshifts between 0.1 and 1, thus probing cluster dark matter profiles at large radii. For two clusters with giant arcs, for which an existing HST image is available, the mass profile reconstruction will be extended into the core, providing evidence to help distinguish between various dark matter models. The second observational program is a deep survey in two colors, V and I, covering a 10 degree-squared area, to search for weak lensing by the large scale structure of the universe, and directly measure the mass power spectrum P(k). Such searches have been severely limited by the narrow fields of view available until now. This instrument should measure positions, shapes, magnitudes and colors of ~1-2 million galaxies in three years.