Dissecting Stars and Gas in High-redshift Cluster Galaxies with ALMA+HST+VLT

使用 ALMA HST VLT 剖析高红移星团星系中的恒星和气体

• 批准号: 2307877
• 负责人: Allison Noble
• 金额: $ 51.29万
• 依托单位: Arizona State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2023
• 资助国家: 美国
• 起止时间: 2023-08-01 至 2026-07-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2307877&HistoricalAwards=false
• 关键词: Dissecting; Stars; Gas; redshift; Cluster

An overarching goal of astrophysics is to better understand the processes that drive the evolution of galaxies. This understanding requires spatially resolved properties of a galaxy's dust and stellar components, as well as its gas reservoir. The Principal Investigator (PI) has used deep observations with the Atacama Large Sub/Millimeter Array (ALMA), the Hubble Space Telescope (HST), and the Very Large Telescope (VLT) of the European Southern Observatory to carry out a spatially resolved study of moderate redshift cluster galaxies. This will allow the PI and her team to map star formation efficiency and measure baryon fractions, evaluate the gravitational stability of disks, determine a spatially resolved star formation law, and identify the dominant star formation "quenching" mechanisms and their timescales, all during cosmic "high noon" - the epoch when star formation reached its peak intensity. These results will be compared with cosmological simulations of galaxy formation and evolution. This work will support the research activities of a graduate student, as well as a program involving undergraduate students in the development of interactive visualizations related to the project's science goals. This research program features the first observational study of molecular gas distribution and kinematics on kiloparsec scales for cluster galaxies beyond z 0.1. Together with the HST and VLT observations, the combined multi-wavelength data set will allow the researchers to fully dissect the baryonic components of moderate redshift cluster galaxies. This study will be complementary to state-of-the-art surveys of spatially resolved molecular gas and star formation at low redshift in both sparsely populated fields (PHANGS, ALMA-QUEST) and in dense cluster (VERTICO) environments, but at significantly higher redshifts, and at the epoch of peak cosmic star formation and cluster assembly, when many important environmental effects are likely occurring. Moreover, it will serve as a direct comparison to the next generation of hydrodynamic simulations (e.g., COLIBRE) to model the kinematics of cold gas directly for the first time.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

天体物理学的总体目标是更好地了解推动星系发展的过程。这种理解需要银河系尘埃和恒星组件及其气体储层的空间解析特性。首席研究员（PI）使用了Atacama大型亚/毫米阵列（ALMA），哈勃太空望远镜（HST）和欧洲南部天文台的非常大的望远镜（VLT）的深入观察，以对中等的红什场群集进行空间解析。这将使PI和她的团队能够绘制星形形成效率并测量重子分数，评估磁盘的重力稳定性，确定空间分辨的恒星形成定律，并确定巨大的星形形成“淬灭”机制及其时间尺度及其时间尺度，所有这些都在宇宙中的“高中”中，当时高峰时代达到了恒星的峰值峰值。这些结果将与星系形成和进化的宇宙学模拟进行比较。这项工作将支持研究生的研究活动，以及涉及本科生开发与项目科学目标相关的互动可视化的计划。该研究计划的首次观察性研究是对k 0.1超过Z 0.1的群集星系的分子气体分布和运动学的首次观察研究。与HST和VLT观测值一起，组合的多波长数据集将使研究人员能够完全剖析中等红移星系星系的重型分量。这项研究将与低红移的空间分子气体和恒星形成的最新调查相互补充。此外，它将直接与下一代流体动力模拟（例如大肠杆菌）进行直接比较，以首次直接建模冷气的运动学。该奖项反映了NSF的法定任务，并被认为是值得通过基金会的知识分子和更广泛影响的评估审查审查标准来通过评估来通过评估来获得支持的。