A Deep Wide Field IR Survey: Old Galaxies at High Redshifts

AST-9900806A深广域红外探测：高红移的古老星系。佩尔松进行了近红外和光学探测，以研究红移从1到2的星系。他的团队拥有一台四通道马赛克红外成像仪(在卡内基和剑桥)，使他们能够探测到1平方度的深度，足以探测到z=1的星系比L暗1等以上的星系，以及z=2的L星系*。他们计划定位存在的最古老的星系，推导出它们的空间密度和光度函数，以便与红移较低的星系进行比较，作为光度和密度演化的测试。他们预计将探测3000个星系，并估计它们的红移为+/-0.2。这些字段已选择为可使用超大型阵列(VLA)访问。*

AST-9900806A deep wide field infrared survey: old galaxies at high redshiftsSven PerssonDr. Persson in conducting a near infrared and optical survey to study galaxies at redshifts from 1 to 2. His team has access to a four-channel mosaic infrared imager (at Carnegie and at Cambridge) that allows them to survey one square degree to depths sufficient to detect galaxies more than a magnitude fainter than L* at z = 1 and L* galaxies to z = 2. They plan to locate the oldest galaxies present, derive their space density and luminosity functions for comparison with lower redshifts as a test for luminosity and density evolution. They expect to detect 3000 galaxies and estimate their redshifts to +/-0.2. The fields have been chosen to reachable with the Very Large Array (VLA).***