On the Trail of the Most Massive Galaxy Clusters in the Observable Universe

追踪可观测宇宙中最大质量星系团的踪迹

• 批准号: 1615657
• 负责人: John Hughes
• 金额: $ 39.86万
• 依托单位: Rutgers University New Brunswick
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-09-01 至 2022-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1615657&HistoricalAwards=false
• 关键词: Trail; Most; Massive; Galaxy; Clusters

Galaxy clusters are enormous reservoirs of galaxies, hot gas and mysterious "dark" matter. The hot gas produces a signal at millimeter wavelengths. The most massive clusters produce the strongest signals. Such signals can be detected from clusters anywhere in the universe. The team used millimeter observations from a space mission to identify massive cluster candidates. They will obtain follow-up observations to confirm the cluster identifications. The clusters will be used to test models of how structures form in the universe. They will also be used to constrain cosmological parameters. Senior team members will train junior team members. The team will develop material in Spanish and present it in Spanish in Illinois schools. The team will also engage with underrepresented minorities in South Africa. The team will conduct follow-up observations of candidate galaxy clusters discovered through the Sunyaev-Zeldovich (SZ) effect. Their extensive imaging and spectroscopy with ground-based facilities will yield confirmed clusters. These are expected to be at high redshift and have high SZ-determined masses. The team will use the clusters to (1) test the Lambda Cold Dark Matter model for structure formation in the universe and (2) improve constraints on cosmological parameters from galaxy cluster counts.

星系团是巨大的星系、热气和神秘的“暗物质”的储存库。高温气体产生毫米波长的信号。最大的星团产生最强的信号。这样的信号可以从宇宙中任何地方的星系团中探测到。该团队利用太空任务中的毫米观测数据来识别大质量星团候选者。他们将进行后续观察，以确认群集的识别。这些星团将被用来测试宇宙结构如何形成的模型。它们还将用于约束宇宙学参数。高级团队成员将培训初级团队成员。该团队将开发西班牙语材料，并在伊利诺伊州的学校用西班牙语呈现。该小组还将与南非代表性不足的少数民族接触。该团队将对通过Sunyaev-Zeldovich （SZ）效应发现的候选星系团进行后续观测。他们广泛的成像和光谱与地面设施将产生确认的集群。这些恒星预计会有高红移，并具有高sz决定的质量。该团队将使用这些星团来(1)测试Lambda冷暗物质模型，以了解宇宙的结构形成；(2)改善星团数量对宇宙学参数的限制。