The Role of Gas in the Evolution of Galaxies

气体在星系演化中的作用

• 批准号: 1412419
• 负责人: Alberto Bolatto
• 金额: $ 50万
• 依托单位: University of Maryland, College Park
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2014
• 资助国家: 美国
• 起止时间: 2014-09-01 至 2018-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1412419&HistoricalAwards=false
• 关键词: Role; Gas; Evolution; Galaxies

One of the principal unsolved problems in modern astrophysics is the formation and evolution of galaxies. Astronomers wish to understand when galaxies first develop, as well as how star formation evolves over the history of the universe. The ultimate goal of this proposal is to develop a physical understanding, informed by observations of galaxies in the nearby and distant universe, of some of the main processes that shape galaxies.The Principal Investigator and collaborators will use new observations, including those with the Atacama Large Millimeter/submillimeter Array (ALMA) and the Plateau de Bure Interferometer (PdBI), to study a number of topics that are required to improve our understanding of galaxy evolution. In a multi-pronged strategy, the team will study the evolution of gas fractions and depletion time scales in main sequence galaxies during cosmic time, the mass dependence of gas fractions, the dominant feedback and quenching mechanisms in field galaxies, the physics of galaxy outflows, and the physical conditions in molecular clouds in low metallicity and starburst galaxies. This research will lead to a greatly improved understanding of galaxy evolution, with ALMA observations forming a central component of the research.The PI will also work with the Graduate Resources Advancing Diversity with Maryland Astronomy and Physics initiative (GRAD-MAP), which is a program designed to lessen the barriers faced by minorities to enter astronomy and physics graduate school. Finally, the PI will continue the development of the Astronomy Workshop Extragalactic (AWE) website, which provides a suite of online demonstrations of astronomical concepts.

现代天体物理学中的主要未解决问题之一是星系的形成和演变。天文学家希望了解星系何时发展，以及恒星形成如何在宇宙历史上演变。 The ultimate goal of this proposal is to develop a physical understanding, informed by observations of galaxies in the nearby and distant universe, of some of the main processes that shape galaxies.The Principal Investigator and collaborators will use new observations, including those with the Atacama Large Millimeter/submillimeter Array (ALMA) and the Plateau de Bure Interferometer (PdBI), to study a number of topics that are required to improve our understanding of星系进化。在一项多管齐下的策略中，团队将研究气体分数和耗尽时间在宇宙时间内主要序列星系的演变，气体分数的质量依赖性，田间星系中的主要反馈和淬火机制，星系的物理学，星系的物理学以及在低量化的云云中的物理条件以及在低算中的物理条件和恒星群中的物理条件。这项研究将使人们对星系发展的了解大大提高，而ALMA观察构成了研究的核心组成部分。PI还将与研究生资源一起推进多样性的研究生天文学和物理学计划（Grad-MAP），该计划旨在减轻少数人所面临的障碍，以降低少数群体，以纳入少数人进入天文学和物理学研究。最后，PI将继续开发天文学讲习班外恋（AWE）网站，该网站提供了一系列在线演示天文学概念。