Collaborative Research: Absorption and Emission Line Probes of Galactic Winds with eBOSS

合作研究：利用 eBOSS 进行银河风的吸收和发射线探测

• 批准号: 2107725
• 负责人: Christy Tremonti
• 金额: $ 27.66万
• 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: 2021
• 资助国家: 美国
• 起止时间: 2021-09-01 至 2024-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2107725&HistoricalAwards=false
• 关键词: Collaborative; Research; Absorption; Emission; Line

Star formation is a very inefficient process with only 5% - 20% of the gas converted into stars. Galactic outflows play an important role in self-regulating star formation and maintaining the low efficiency. The Principal Investigators (PIs) Tremonti, Diamond-Stanic and Lundgren, will use observations of 300,000 galaxies from the extended Baryon Oscillation Spectroscopic Survey (eBOSS) to measure the physical properties of galaxies, including the outflowing gas, to investigate the underlying physics responsible for the low efficiency of galactic star formation. To promote student engagement in science technology engineering and mathematics (STEM) the PIs will design a set of web-based computational astronomy activities suitable for both high school and undergraduate students using the eBOSS survey data. The team will disseminate these activities through a series of workshops for educators and evaluate their effectiveness in improving students’ data literacy, computational skills, and interests in science.The team will create and analyze high-quality spectra based on stacks of thousands of individual eBOSS galaxy spectra at redshifts of 0.4 z 1. They will compare outflowing gas traced via absorption lines to outflowing gas traced via emission lines to test whether these methodologies are measuring the same or different components of the outflow. They will also measure the geometry and spatial extent of the outflows through backlighting experiments that use the spectra of background quasars and use this information to estimate robust mass outflow rates. The team will identify clear empirical relationships between galactic outflows and galaxies. They will release a catalog of stacked spectra and associated physical properties to the public.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.

恒星形成是一个非常无效的过程，只有5％ - 20％的气体转化为恒星。银河出口在自我调节恒星形成和保持低效率方面起着重要作用。主要研究人员（PIS）Tremonti，Diamond-Staniic和Lundgren将使用从扩展的Baryon振荡光谱调查（EBOSS）中观察到300,000个星系（EBOSS），以测量包括流出气体在内的星系性能的物理性能，以调查降低的物理学负责造成银河系形成效率低的物理学。为了促进学生参与科学技术工程和数学（STEM），PIS将使用EBOSS调查数据设计一套适合高中和本科生的基于网络的计算天文学活动。该团队将通过一系列研讨会为教育工作者分散这些活动，并评估他们在改善学生的数据素养，计算技能和科学的兴趣方面的有效性。该团队将根据成千上万个单个单独的eBoss Galaxy Spectra的堆栈创建和分析高质量的光谱出口的相同或不同的组件。他们还将通过背光实验测量出口的几何形状和空间范围，这些实验使用背景类星体的光谱，并使用此信息来估计稳健的质量出口速率。该团队将确定银河插座和星系之间的明确经验关系。他们将向公众发布堆叠光谱和相关物理特性的目录。该奖项反映了NSF的法定任务，并使用基金会的知识分子优点和更广泛的影响标准，被认为值得通过评估来获得支持。