Collaborative Research: The GOGREEN Survey - Caring about the Environment

合作研究：GOGREEN 调查 - 关心环境

• 批准号: 1517815
• 负责人: Gregory Rudnick
• 金额: $ 34.76万
• 依托单位: University of Kansas Center for Research Inc
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2015
• 资助国家: 美国
• 起止时间: 2015-09-01 至 2019-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1517815&HistoricalAwards=false
• 关键词: Collaborative; Research; GOGREEN; Survey; Caring

The team will use ground-based telescopes to study the vast population of "satellite" galaxies that live in the suburbs of cities of galaxies called clusters. We know that satellite galaxies can transform themselves from bluish systems rife with brilliant, young stars into reddish systems filled with dull, old stars. But models that attempt explain this remarkable transformation fail dismally. This means that the modellers need much more guidance about factors that govern a galaxy's life in the suburbs. The team will provide that important guidance. The team will also expand existing, successful outreach programs at their institutions. Areas of emphasis include high school students using the new data to conduct inquiry-based research, school teachers adding evidence-based research into their lesson plans, deaf students "smelling" and "touching" data that have been suitably transformed, and Hispanic students being encouraged to continue on from college to graduate school.The aim of the project is to examine the physical processes responsible for quenching the star formation in clusters' satellite galaxies, as distinct from their central galaxies. Models of central-galaxy quenching agree well with observations. In contrast, models of satellite-galaxy quenching strongly violate observations, meaning that such models need better guidance about the processes involved. The team will provide that guidance by obtaining new spectroscopic data for massive groups and clusters at redshifts of 1-1.5 and comparing those data to existing lower-redshift data. These comparisons will be used to analyze the dominant modes of satellite quenching, how galaxies populate dark-matter halos as a function of environment, the relative timing of morphological transformation and star-formation quenching, and the dominant driver of size growth in quenched galaxies. These results will lead to new, better-informed models of satellite-galaxy quenching.

该团队将使用地面望远镜来研究生活在称为簇的星系城市郊区的大量“卫星”星系。我们知道，卫星星系可以从蓝色的系统中转变为鲜艳的年轻恒星变成充满沉闷的老明星的红色系统。但是尝试解释这种非凡转变的模型失败了。这意味着，模板需要更多关于控制银河系在郊区生活的因素的指导。团队将提供重要的指导。该团队还将在其机构扩大现有的成功外展计划。重点的领域包括使用新数据进行基于询问的研究的高中生，学校老师在他们的课程计划中增加了基于循证的研究，聋哑学生“闻到”和“触摸”的数据，这些数据经过适当转化，并鼓励西班牙裔学生继续从大学继续进行研究生院。中央 - 加拉克斯猝灭的模型与观察非常吻合。相比之下，卫星 - 加拉克斯式淬火的模型强烈违反了观察结果，这意味着这样的模型需要更好地指导所涉及的过程。该团队将通过以1-1.5的红移获得大量组和集群的新光谱数据来提供指导，并将这些数据与现有的下部降低数据进行比较。这些比较将用于分析卫星淬火的主要模式，星系如何填充暗物膜作为环境的函数，形态转化和恒星形成猝灭的相对时机以及淬灭星系中大小生长的主要驱动力。这些结果将导致卫星 - 加拉克斯式淬火的新模型。