Integral Field Spectroscopic Constraints on the Physics of Galactic Winds and Gas Accretion

银河风和气体吸积物理学的积分场光谱约束

• 批准号: 2009417
• 负责人: Kate Rubin
• 金额: $ 35.14万
• 依托单位: San Diego State University Foundation
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-07-01 至 2024-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2009417&HistoricalAwards=false
• 关键词: Integral; Field; Spectroscopic; Constraints; Physics

Astronomers want to understand why some regions in a galaxy form stars and other regions do not. In-flowing gas delivers star-building material, but exploding stars create outflowing winds, removing material, and preventing further star formation. Rubin and her collaborators will study the inflow and outflow of gas in star forming regions in order to understand how gas flows shape galaxies. To promote diversity in astronomy local high school and community college students and beginning undergraduates will be recruited for an annual summer school. The students will participate in research projects and learn about computer programming. Empirical constraints on the kinematics and morphology of cool (T 1000 K) gas flows around galaxies are crucial to building a complete theory of galaxy formation. Archival observations taken with the Multi Unit Spectroscopic Explorer (MUSE) on the Very Large Telescope of ~45 nearby star-forming galaxies will be analyzed to conduct a kinematic study of interstellar NaI absorption. This will constrain the cool wind velocity and the incidence of cool gas accretion on ~50 – 100 pc scales, and establish the relationship between these processes and local star formation activity. A comparative analysis of absorption from cool galactic gas flows predicted in the FIRE-2 suite of cosmological galaxy formation simulations will be made. This project will produce a novel set of empirical constraints on the energetics of galactic winds and on the morphology of galactic gas accretion.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.

天文学家想知道为什么星系中的一些区域形成恒星，而另一些区域不形成恒星。流入的气体提供了恒星形成的物质，但是爆炸的恒星产生了外流的风，带走了物质，阻止了星星的进一步形成。鲁宾和她的合作者将研究气体在星星形成区域的流入和流出，以了解气体流动如何塑造星系。为了促进天文学的多样性，将招募当地高中和社区大学的学生和刚开始的本科生参加一年一度的暑期学校。学生将参加研究项目，学习计算机编程。 经验约束的运动学和形态的冷（T 1000 K）气体流星系周围是至关重要的建立一个完整的星系形成理论。将分析用多单元光谱探测器（MUSE）在甚大望远镜上对~45个邻近恒星形成星系进行的档案观测，以进行星际NaI吸收的运动学研究。这将把冷风速和冷气体吸积的发生率限制在~50 - 100 pc尺度上，并建立这些过程与局部星星形成活动之间的关系。将对宇宙学星系形成模拟的FIRE-2套件中预测的冷星系气体流的吸收进行比较分析。该项目将产生一套新的经验约束的能量银河风和星系气体accessition.This奖的形态反映了NSF的法定使命，并已被认为是值得通过使用基金会的智力价值和更广泛的影响审查标准进行评估的支持。

项目成果

On the Kinematics of Cold, Metal-enriched Galactic Fountain Flows in Nearby Star-forming Galaxies

• DOI: 10.3847/1538-4357/ac7b88
• 发表时间: 2022-08
• 期刊: The Astrophysical Journal
• 作者: K. Rubin;Christian Juarez;K. Cooksey;J. Werk;J. Prochaska;J. O’Meara;J. Burchett;Ryan J. Rickards Vaught;V. Kulkarni;L. Straka

Constraining the Size of the Circumgalactic Medium Using the Transverse Autocorrelation Function of C iv Absorbers in Paired Quasar Spectra

利用成对类星体光谱中 C iv 吸收体的横向自相关函数约束环绕银河系介质的大小

• DOI: 10.3847/1538-3881/ac764d
• 发表时间: 2022
• 期刊: The Astronomical Journal
• 作者: Mintz, Abby;Rafelski, Marc;Jorgenson, Regina A.;Fumagalli, Michele;Dutta, Rajeshwari;Martin, Crystal L.;Lusso, Elisabeta;Rubin, Kate H. R.;O’Meara, John M.
• 通讯作者: O’Meara, John M.