CAREER: Constraining the Chemical Evolution of Galaxies with MaNGA

职业：用 MaNGA 约束星系的化学演化

• 批准号: 1554877
• 负责人: Christy Tremonti
• 金额: $ 94.89万
• 依托单位: University of Wisconsin-Madison
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-01-01 至 2021-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1554877&HistoricalAwards=false
• 关键词: CAREER; Constraining; Chemical; Evolution; Galaxies

The team will investigate the abundance of an element, oxygen, commonly found in nearby galaxies with star-studded disks of gas. Over time, the gas in a galaxy is chemically enriched by successive generations of stars. Oxygen is used to trace how this "pollution" varies within a galaxy and from one galaxy to another. This information will help solve the important problem of how galaxies evolve. Senior team members will train junior members. The team will also develop a hands-on exhibit for a science museum. The innovative exhibit will mimic the research equipment and use custom software to demonstrate the research technique. In a tour de force, the team will use a cutting-edge observing technique - multi-fiber spectroscopy - to measure oxygen variations within about 3600 galaxies from the just-started survey for Mapping Nearby Galaxies at Apache Point Observatory (MaNGA). The team's specific goals are to (1) quantify the oxygen gradients, (2) study their relationships to the galaxies' physical properties, (3) study how winds from a galaxy redistribute its oxygen, and (4) search for the abrupt falloffs in oxygen that signal accretion of relatively pristine gas. This research will provide insights into the physical processes that drive chemical enrichment. Those insights will, in turn, lead to important improvements in theorists' simulations of how galaxies evolve.

该小组将研究在附近星系中有星光熠熠的气体磁盘通常发现的元素，氧气的丰富度。随着时间的流逝，银河系中的气体被连续的几代恒星化学丰富。氧气用于追踪该“污染”在星系中以及从一个星系到另一个星系之间的变化。这些信息将有助于解决星系如何发展的重要问题。高级团队成员将培训初级成员。该团队还将为科学博物馆开发一个动手展览。创新的展览将模仿研究设备，并使用自定义软件来展示研究技术。在巡回赛中，团队将使用尖端的观测技术 - 多纤维光谱法 - 从刚刚开始的调查中测量约3600个星系中的氧气变化，以绘制Apache Point Point Vistoration（Manga）的附近星系的绘制。该团队的具体目标是（1）量化氧梯度，（2）研究其与星系物理特性的关系，（3）研究星系中的风如何重新分布其氧气，以及（4）搜索突然的氧气中的氧气中的氧气中的氧气中有相对原始气体的信号。这项研究将提供有关驱动化学富集的物理过程的见解。这些见解反过来将导致理论家对星系如何发展的模拟进行重要改进。