Modeling the physics of gas removal and star formation quenching in Local Group satellite galaxies with next-generation simulations

该奖项全部或部分由《2021年美国救援计划法案》（公法117-2）资助。詹娜·塞缪尔被授予美国国家科学基金会天文学和天体物理学博士后奖学金，在德克萨斯大学进行研究和教育项目。塞缪尔将对银河系和仙女座星系进行详细的计算机模拟。这项研究的结果将使天文学家了解星系中气体是如何被移除和恒星形成是如何被熄灭的。对于这个项目的教育部分，Samuel将开展一系列研讨会，并开展研究指导活动，以增加有色人种学生在科学领域的留存。该项目将对类毫瓦光晕环境进行超高分辨率的宇宙模拟，并对其进行基准测试。它将产生卫星矮星系中恒星反馈和冲压压力剥离的第一个数值收敛模型，并将为确定(1)导致MW卫星星系如此彻底熄灭的原因，(2)MW晕环境是否具有附近类似物的典型特征，以及(3)MW卫星在形成历史上是否独一无二提供全面的理论基础。该奖项反映了美国国家科学基金会的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

This award is funded in whole or in part under the American Rescue Plan Act of 2021 (Public Law 117-2). Jenna Samuel is awarded an NSF Astronomy and Astrophysics Postdoctoral Fellowship to conduct a program of research and education at the University of Texas. Samuel will perform detailed computer simulations of the Milky Way (MW) and Andromeda galaxies. Results from this study will allow astronomers to understand how gas is removed and star formation quenched in galaxies. For the education component of this project, Samuel will develop a seminar series and conduct research mentorship activities to increase the retention of students of color in the sciences.This project will conduct and benchmark exceedingly high-resolution cosmological simulations of MW-like halo environments. It will produce the first numerically converged models of stellar feedback and ram pressure stripping in satellite dwarf galaxies, and it will provide a comprehensive theoretical basis for determining (1) what caused the MW satellite galaxies to quench so completely, (2) whether the MW halo environment is typical of nearby analogs, and (3) whether MW satellites are unique in their formation history.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.