Collaborative Research: Galaxy Growth in Different Environments in the Early Universe from z=1.9 to 3.5

该小组将对数十万个星系进行光学和红外观测。这些观测选出了大约100亿到120亿年前的星系。这一时期被认为是星系剧烈变化的时期之一。该团队将研究这些变化是如何取决于一个星系是否有很多邻居，还是根本没有邻居。由于没有足够的观察资料，以前无法研究这个重要的课题。该团队将向公众发布他们组装的目录。高级团队成员将培训初级成员。该团队将进行公开演讲，为教师提供住宿工作坊，并为儿童科学博物馆开发三维展示。在这次力作中，该团队将结合五个深度广域星系调查的数据，包括光度测定和积分场单位光谱学。他们将利用这些综合数据，在红移z ~ 1.9到3.5的整个星系环境中研究星系的演化。这些是星系演化的关键红移，因为它们探测了大质量星系的集合，恒星形成和黑洞吸积的高峰，以及最大的原始星系团的坍缩。该团队将对大约60万个星系进行光度测量，对大约26万个星系进行光谱学研究。利用这个数据集，该团队将进行迄今为止不可能进行的有统计学意义的分析。

The team will assemble optical and infrared observations of hundreds of thousands of galaxies. The observations pick out galaxies about 10 to 12 billion years back in time. This period is known to be one of hectic change for galaxies. The team will study how these changes depend on whether a galaxy has many neighbors, or no neighbors at all. This important topic could not be studied before because not enough observations were available. The team will release their assembled catalog to the public. Senior team members will train junior members. The team will give public talks, offer residential workshops to teachers and develop a three-dimensional show for a children's science museum.In a tour de force, the team will combine data from five deep, wide-area galaxy surveys that include both photometry and integral-field-unit spectroscopy. They will use the combined data to study galaxy evolution over the full range of galactic environments at redshifts z ~ 1.9 to 3.5. These are key redshifts for galaxy evolution, as they probe the assembly of massive galaxies, the peaks in star formation and black-hole accretion, and the collapse of the largest proto-clusters of galaxies. The team will amass photometry for about 600,000 galaxies and spectroscopy for about 260,000 galaxies. Using this dataset, the team will conduct statistically meaningful analyses that were heretofore impossible.