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

该团队将汇集对数十万个星系的光学和红外观测。这些观测发现了大约100亿到120亿年前的星系。众所周知，这一时期是星系变化最剧烈的时期之一。该团队将研究这些变化如何取决于一个星系是否有很多邻居，或者根本没有邻居。这一重要课题以前无法研究，因为没有足够的观测资料。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，为教师提供住宅工作坊，并为一家儿童科学博物馆开发三维展示。在一次巡回演出中，该团队将结合五次深度、广域星系调查的数据，其中包括光度学和积分场单位光谱学。他们将使用合并后的数据来研究红移为z~1.9到3.5的全范围星系环境的星系演化。这些红移是星系演化的关键红移，因为它们探测到大质量星系的组装，恒星形成和黑洞吸积的峰值，以及最大的原始星系团的崩溃。该团队将积累约60万个星系的光度测量数据和约26万个星系的光谱数据。使用这个数据集，该团队将进行统计上有意义的分析，这些分析到目前为止是不可能的。

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.