Collaborative Research: The Cosmic Baryon Cycle in 3D

合作研究：3D 宇宙重子循环

• 批准号: 2206853
• 负责人: Rongmon Bordoloi
• 金额: $ 43.51万
• 依托单位: North Carolina State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-10-01 至 2025-09-30
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2206853&HistoricalAwards=false
• 关键词: Collaborative; Research; Cosmic; Baryon; Cycle

The cycling of gas into and out of galaxies regulates their star formation. Emission from the gas is faint, making it difficult to study the flow of gas. A natural solution is to observe lensed galaxies, where a foreground galaxy bends the light from the distant galaxy. This gravitational lensing serves as a natural telescope, magnifying the weak emission and zooming in to map small scale structures. Principal Investigators (PIs) Bordoloi and Howk will analyze spectra from a sample of lensed galaxies to study how the flow of gas impacts star formation. The team will develop outreach videos and images highlighting integral field spectroscopy, gravitational lensing, and gas flows in the circumgalactic medium (CGM). In collaboration with The Science House at North Carolina State University, the team will host night-time star gazing and day-time solar observing events for the public.The PIs will analyze new and archival spectra from the Keck Cosmic Web Imager (KCWI) instrument at the W. M. Keck Observatory and The Multi Unit Spectroscopic Explorer (MUSE) at the Very Large Telescope (VLT) of a sample of z 2 lensed quasar and galaxy systems. Analysis of multiple/arced sightlines will be used to obtain 3D, spatially-resolved maps of the CGM on scales of approximately 1 kpc. The team will use the maps to trace the kinematics and metallicity of the CGM and provide insights on galaxy formation and quenching of star formation.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.

气体进入星系的循环会调节其恒星形成。气体发射是微弱的，因此很难研究气体的流动。天然解决方案是观察镜头星系，前景星系从遥远的星系中弯曲光。 这种引力镜头是天然望远镜，将弱发射放大并放大到绘制小规模结构。主要研究者（PIS）Bordoloi和Howk将分析来自镜头星系样本的光谱，以研究气体流动如何影响恒星形成。该团队将开发外展视频和图像，突出显示整体场光谱，重力镜头和圆形培养基（CGM）中的气流。该团队将与北卡罗来纳州立大学的科学院合作举办夜间明星凝视和白天的太阳能观察活动，为公众观察活动。和星系系统。 对多个/弧形视线的分析将用于在约1 kpc的尺度上获得CGM的3D，空间分辨的图。该团队将使用这些地图来追踪CGM的运动学和金属性，并提供有关星系形成和恒星形成的淬火的见解。该奖项反映了NSF的法定任务，并被认为是通过基金会的知识分子优点和更广泛的影响审查标准来通过评估来获得支持的。

项目成果

Resolving the H i in damped Lyman α systems that power star formation

解析为恒星形成提供动力的阻尼莱曼α系统中的 H i

• DOI: 10.1038/s41586-022-04616-1
• 发表时间: 2022
• 期刊: Nature
• 影响因子: 64.8
• 作者: Bordoloi, Rongmon;O’Meara, John M.;Sharon, Keren;Rigby, Jane R.;Cooke, Jeff;Shaban, Ahmed;Matuszewski, Mateusz;Rizzi, Luca;Doppmann, Greg;Martin, D. Christopher
• 通讯作者: Martin, D. Christopher