Collaborative Research: Taking Measure of the Universe with Galaxy and Cluster Surveys

合作研究：通过星系和星团巡天测量宇宙

• 批准号: 0708490
• 负责人: Anthony Gonzalez
• 金额: $ 33.89万
• 依托单位: University of Florida
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-08-15 至 2011-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0708490&HistoricalAwards=false
• 关键词: Collaborative; Research; Taking; Measure; Universe

AST-0708490/AST-0708539Gonzalez/MohrThis project will execute a series of progressively more precise measurements of the expansion history of the Universe using galaxy cluster surveys and the clustering of galaxies. This team will complete and characterize two multi-band optical and infrared cluster surveys, the IRAC Shallow Cluster Survey (ISCS), using the Spitzer Space Telescope, and the Blanco Cosmology Survey (BCS), using the Blanco 4m telescope in Chile. The BCS will be used to measure the galaxy power spectrum with 3.5 million galaxies extending to redshifts greater than one. These new programs will be coordinated with current and forthcoming millimeter-wave surveys designed to find clusters using the Sunyaev-Zel'dovich effect. Future surveys intended to deliver constraints on the dark energy equation of state will invariably be limited by systematic rather than statistical uncertainties. The ISCS and BCS will clarify and quantify these systematic effects, while simultaneously obtaining new, near-term cosmological constraints. The work uses catalog and cluster simulations to estimate precisely the survey completeness and contamination, and the cluster mass estimate accuracy. It also focuses on fields with optical/infrared and mm-wave data, now or soon, and with some existing X-ray data. The multi-wavelength approach enables a cross-calibration of the leading cluster selection methods, the possibility of developing cleaner and more sensitive selection techniques, and direct tests of the selection models.This project will significantly impact larger experiments under way and to come. Because the BCS will constitute the largest contiguous deep optical survey in the southern hemisphere, the resulting public data set will be of great value for numerous other applications, such as galaxy evolution studies. This team has a record of working with K-12 teachers and students, and will expand that work in conjunction with the present research.

AST-0708490/AST-0708539GONZALEZ/MOHRTHIS项目将使用星系群集调查和星系集群对宇宙扩展历史进行一系列更精确的测量。 该团队将使用Spitzer Space Telescope以及Blanco 4M 4M Telescope使用Spitzer Space Telescope（BCS）来完成并表征两个多波段光学和红外集群调查，即IRAC浅集群调查（ISC），以及Blanco宇宙学调查（BCS）。 BCS将用于测量350万个星系扩展到大于一个的红移的星系功率谱。 这些新程序将与当前和即将进行的毫米波调查协调，旨在使用Sunyaev-Zel'Dovich效果找到集群。 未来的调查旨在对国家的暗能量方程进行约束，这总是受到系统的而不是统计不确定性的限制。 ISC和BC将澄清和量化这些系统效应，同时获得新的，近期的宇宙学约束。 该作品使用目录和集群模拟来精确估计调查的完整性和污染，以及群集质量估计的准确性。 它还关注现在或不久的将具有光学/红外和MM波数据的字段以及一些现有的X射线数据。 多波长方法可以对领先的群集选择方法进行交叉校准，开发清洁剂和更敏感的选择技术的可能性以及选择模型的直接测试。此项目将显着影响正在进行的较大实验和未来。 由于BCS将构成南半球最大的连续性光学调查，因此所得的公共数据集将对许多其他应用（例如Galaxy Evolution Evolution Lestona）具有很高的价值。 该团队有与K-12老师和学生合作的记录，并将与本研究结合使用。