High Resolution Observations of the Sunyaev-Zel'dovich Effect in Clusters of Galaxies at 90 GHz Using the GBT

使用 GBT 在 90 GHz 下对星系团中的 Sunyaev-Zeldovich 效应进行高分辨率观测

• 批准号: 1309032
• 负责人: Mark Devlin
• 金额: $ 50.63万
• 依托单位: University of Pennsylvania
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-09-01 至 2017-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1309032&HistoricalAwards=false
• 关键词: Resolution; Observations; Sunyaev; Zel; dovich

Clusters of galaxies are the largest gravitationally bound objects in the Universe, provide important tests of cosmology, and serve as rich astrophysical laboratories for events such as mergers and Active Galactic Nuclei (AGN) outbursts. As tracers of the evolution of structure, clusters of galaxies represent an important cosmological tool, and this project aims to directly measure the pressure profile in the intracluster medium of clusters to advance our understanding of cluster physics.This project aims to map the Sunyaev-Zel'dovich effect (SZE) in galaxy clusters at 90 GHz with the 100-meter Green Bank Telescope (GBT) with a combination of unprecedented mapping speed, resolution, and sky coverage. Using the MUSTANG-1.5 instrument, the investigators will image a statistically significant set of X-ray and SZE selected sample of massive clusters in three seasons and will observationally determine the scatter in cluster-mass/SZE observable scaling relations due to cluster mergers, AGN feedback, and other astrophysical processes.Educationally, the principal investigator will also provide valuable research experiences to undergraduate and high school students by bringing them into the research program to assist, and even run, remote observing sessions.

星系团是宇宙中最大的引力束缚天体，为宇宙学提供了重要的测试，并为合并和活动星系核（AGN）爆发等事件提供了丰富的天体物理实验室。 作为结构演化的示踪物，星系团是一种重要的宇宙学工具，本项目的目标是利用100米绿色班克望远镜（GBT）在90 GHz的频率上直接测量星系团内介质的压力分布，以加深我们对星系团物理的理解。结合了前所未有的测绘速度、分辨率和天空覆盖范围。 使用MUSTANG-1.5仪器，研究人员将在三个季节中对一组具有统计学意义的X射线和SZE选择的大质量星团样本进行成像，并将通过观测确定由于星团合并，AGN反馈和其他天体物理过程而导致的星团质量/SZE可观测标度关系的分散。首席研究员还将为本科生和高中生提供宝贵的研究经验，让他们参与研究计划，协助甚至主持远程观察会议。