Collaborative Research: The DEEP Survey of the Distant Universe

这是一个与加州大学伯克利分校的马克·戴维斯合作的研究项目(AST0071048)。这项研究的目标是对红移为Z0.7的星系进行大规模、系统的调查。这项调查是为了测量遥远星系的性质及其在太空中的分布而设计的。它由两部分组成：1小时调查(1HS)，绘制具有Z0.7的约50,000个星系的空间位置图；以及3小时调查(3HS)，对1HS目标的一个子样本进行调查，利用HST成像数据测量约5,000个星系的红移、线宽和结构，并比1HS深入光度函数约1个数量级。Faber、Davis和他的合作者将使用这些数据来确定Z~1处星系的基本性质，例如：数密度、星系关联函数和作为星系类型函数的星系团统计。他们还将使用3HS的数据来确定这次红移时的暗晕质量和潜在的暗物质分布，以及“偏置函数”。这个合作项目支持夏威夷凯克望远镜上的120夜观测计划，该计划将获得大约60,000个暗星系的光谱数据，目的是阐明暗而遥远的星系的性质，以及它们的空间分布统计数据。这项深入的调查将提供一个史无前例的、对宇宙具有重大意义的回顾时期的宇宙详细观察。这项调查将产生有关高红移星系及其环境的信息，其质量可与目前可用于附近星系的数据相媲美。这个数据集将向更广泛的社区提供网络访问，将使对替代宇宙学模型的进化预测的强大测试成为可能。通过计算星系的丰度和测量的红移，人们可以精确地确定宇宙膨胀的加速率，这是对基础物理的测试。这次深度调查将充分利用正在为凯克望远镜准备的新光谱仪--Deimos，它具有大视场、高光谱分辨率和宽光谱覆盖范围。深空探测的科学计划无法在世界各地的任何其他仪器或望远镜上有效地复制。该项目的资金由NSF河外天文和宇宙学计划(AST/EXC)和MPS多学科活动办公室提供。

ABSTRACTAST-0071198FaberThis is a collaborative research project with Marc Davis at University of California, Berkeley (AST0071048). The goal of this research is to conduct a large, systematic survey of galaxies with redshifts Z 0.7. This survey (Deep Extragalactic Evolutionary Probe - DEEP) is designed to measure both the properties of distant galaxies and their distribution in space. It consists of two parts: a 1-hour survey (1HS), to map the spatial locations of ~50,000 galaxies with Z0.7, and a 3-hour survey (3HS), on a sub sample of the 1HS targets, to measure redshifts, line widths, and structure for ~5,000 galaxies, using HST imaging data, and going ~ 1 magnitude deeper into the luminosity function than the 1HS. Faber, Davis, and collaborators will use the data to determine fundamental properties of galaxies at Z~1 such as: number densities, the galaxy correlation function, and clustering statistics as a function of galaxy type. They will also use the data from the 3HS to determine the dark halo masses and underlying dark matter distribution at this redshift, as well as the "biasing function." This collaborative project supports a 120 night observing program on the Keck telescope in Hawaii that will garner spectroscopic data on approximately 60,000 faint galaxies, with the goal of elucidating the properties of faint, distant galaxies, as well as the statistics of their spatialdistribution. The DEEP survey will provide an unprecedented, detailed look at the universe at cosmologically significant lookback times. The survey will generate information on high redshift galaxies and their environment that is comparable in quality to data currently available for nearby galaxies. This dataset, which will be made Web accessible to the broader community, willenable powerful tests of the evolutionary predictions of alternative cosmological models. By counting the abundance of galaxies versus measured redshift, one can precisely determine the acceleration rate of the expansion of the Universe, a test of fundamental physics. The DEEP survey will take full advantage of a new spectrograph being prepared for the Keck telescope, DEIMOS, which has a large field of view, high spectral resolution, and wide spectralcoverage. The scientific program of the DEEP survey cannot be replicated efficiently on any other instrument or telescope worldwide. Funding for this project was provided by the NSF program for Extragalactic Astronomy & Cosmology (AST/EXC) and the MPS Office of Multidisciplinary Activities.***