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

该奖项的全部或部分资金来自《2021年美国救援计划法案》(公法117-2)。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，负责德克萨斯大学的一项研究和教育项目。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气体是如何在星系中被移除和恒星形成是如何熄灭的。对于这个项目的教育部分，塞缪尔将开发一系列研讨会和开展研究指导活动，以增加有色人种学生在科学中的留存。这个项目将进行和基准非常高分辨率的类MW光晕环境的宇宙学模拟。它将产生首个卫星矮小星系中恒星反馈和冲压剥离的数值收敛模型，并将为确定(1)是什么导致微波卫星星系如此完全熄灭提供全面的理论基础，(2)微波晕环境是否为附近类似星系的典型，以及(3)微波卫星是否在其形成历史上是独一无二的。该奖项反映了美国国家科学基金会的法定任务，并通过使用基金会的智力优势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.