Postdoctoral Fellowship: AAPF: Constraining the Cosmic Evolution of Environmental Quenching & Predicting Protocluster Populations

Devontae巴克斯特被授予NSF天文学和天体物理学奖学金，在圣地亚哥的加州大学开展研究和教育计划。巴克斯特将结合联合收割机对星系群和星系团的尖端观测和最先进的模拟，以确定是什么驱动了卫星星系中星星形成的抑制（或淬灭），以及这个过程在早期宇宙中是否不同。巴克斯特还将推出计算天体物理学研究准备（CARP）计划，为未来的社区学院转学生提供i）开始学术研究所需的计算技能，ii）相关的导师，以帮助他们在四年制大学内外的转学过程和随后的成功。该项目将联合收割机结合大体积、高分辨率的宇宙学N体模拟和最全面的星系群和星系团光谱和多通带成像巡天观测，以（1）分离出导致z ~ 1大质量星系群卫星中气体-恒星循环破裂的主要猝灭机制，（2）对z ~ 1环境猝灭的晕质量依赖性进行严格的限制，（3）对z ~ 1大质量星系群卫星中气体-恒星循环破裂的主要猝灭机制进行严格的限制，（4）对z ~ 1大质量星系群卫星中气体-恒星循环的猝灭机制进行严格的限制。（3）限制了过去80亿年来群和星系团的猝灭时间尺度的红移演化;（4）对大质量星系团的祖先的不受约束的静态种群进行物理上的预测-该奖项反映了NSF的法定使命，并通过使用基金会的智力价值和更广泛的评估被认为值得支持。影响审查标准。

Devontae Baxter is awarded an NSF Astronomy and Astrophysics Fellowship to carry out a program of research and education at the University of California, San Diego. Baxter will combine cutting-edge observations and state-of-the-art simulations of galaxy groups and clusters to determine what drives the suppression (or quenching) of star formation in satellite galaxies, and whether the process is different in the early cosmos. Baxter will also launch the Computational Astrophysics Research Preparation (CARP) program to provide prospective community college transfer students with i) the computational skills necessary to begin academic research and ii) relevant mentorship to aid in their transfer process and subsequent success at and beyond the four-year university. This project will combine large volume, high-resolution cosmological N-body simulations with observations from the most comprehensive spectroscopic and multi-passband imaging surveys of galaxy groups and clusters to (1) isolate the dominant quenching mechanism responsible for breaking the gas-star cycle in satellites of massive groups at z ~ 1; (2) place robust constraints on the halo-mass dependence of environmental quenching at z 1; (3) constrain the redshift evolution of the quenching timescale for group and cluster populations over the last 8 billion years; and (4) make physically motivated predictions for the poorly constrained quiescent population of the progenitors of massive clusters – i.e. protoclusters.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.