The Physics of Satellite Galaxy Quenching: Novel Analysis of Observations, and High-Resolution Simulations

卫星星系猝灭的物理学：观测的新颖分析和高分辨率模拟

• 批准号: 1815475
• 负责人: Michael Cooper
• 金额: $ 34.73万
• 依托单位: University of California-Irvine
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2018
• 资助国家: 美国
• 起止时间: 2018-08-15 至 2023-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1815475&HistoricalAwards=false
• 关键词: Physics; Satellite; Galaxy; Quenching; Novel

This project will study the physical mechanisms responsible for halting the formation of stars in satellite galaxies. These galaxies, which orbit more massive galaxies, represent a large segment of the global galaxy population. They are poorly understood. The proposed research will combine analysis of imaging and spectroscopic datasets as well as computer simulations to study the physical mechanism for quenching of star formation in these satellite galaxies. Dr. Cooper will also educate and mentor underrepresented students as part of the new Cal-Bridge program, which is designed to increase the number of minority students who successfully transition from Cal State Universities into graduate school at UC campuses in astrophysics or physics. As a core member of the program, Dr. Cooper will serve as a one-on-one mentor and research advisor to individual Cal-Bridge scholars, while also developing day-long, program-wide professional development seminars, focusing on topics ranging from scientific coding to preparation for the GRE exam.Despite success at modeling the evolution of massive galaxies over cosmic time, modern models of galaxy formation fail to reproduce the properties of low-mass galaxies over cosmic time. This shortcoming in our theoretical picture is largely driven by an inability to understand the physics of satellite (or "environmental") quenching. To address this shortcoming, the proposed research program employs observations of satellite galaxies across a broad range in stellar mass and host halo mass at z 2 in tandem with a focused semi-analytic modeling effort, to identify the particular physical mechanisms at play once a satellite is accreted onto a host halo. The proposed analysis will test a model whereby starvation and ram-pressure stripping are the dominant quenching mechanisms above and below a critical scale, respectively. Dr. Cooper will lead a targeted spectroscopic campaign to catalog an unprecedented sample of satellite galaxies in groups at z ~ 1. This effort will be complemented by a statistical analysis of satellites at z 2 using deep imaging in legacy extragalactic fields. This program will significantly expand our knowledge of the physical processes that quench satellites and drive the build-up of the quiescent galaxy population at z 2, directly addressing a major failure of current galaxy formation models. In addition, Dr. Cooper will educate and mentor underrepresented students as part of the new Cal-Bridge program, which is designed to increase the number of minority students who successfully transition from Cal State Universities into graduate school at UC campuses in astrophysics or physics.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.

该项目将研究导致卫星星系中恒星形成停止的物理机制。这些围绕质量更大的星系运行的星系代表了全球星系群的很大一部分。人们对它们知之甚少。拟议的研究将结合成像和光谱数据集的分析以及计算机模拟来研究这些卫星星系中恒星形成猝灭的物理机制。作为新的加州大学桥项目的一部分，库珀博士还将教育和指导代表性不足的学生，该项目旨在增加从加州州立大学成功过渡到加州大学天体物理学或物理学研究生院的少数族裔学生的数量。作为该项目的核心成员，库珀博士将担任加州大学桥分校学者的一对一导师和研究顾问，同时还举办为期一天的全项目专业发展研讨会，重点关注从科学编码到准备 GRE 考试等主题。尽管在模拟大质量星系在宇宙时间内的演化方面取得了成功，但现代星系形成模型未能重现低质量星系的特性 宇宙时间上的星系。我们的理论图景中的这一缺陷很大程度上是由于无法理解卫星（或“环境”）猝灭的物理原理造成的。为了解决这一缺陷，拟议的研究计划采用了对z 2 处恒星质量和宿主晕质量的卫星星系的观测，并结合重点的半解析建模工作，以确定卫星吸积到宿主晕上后发挥作用的特定物理机制。所提出的分析将测试一个模型，其中饥饿和冲压压力剥离分别是高于和低于临界规模的主要淬火机制。 Cooper 博士将领导一项有针对性的光谱活动，对 z ~ 1 处的卫星星系组进行前所未有的样本编录。这项工作将得到利用传统河外场深度成像对 z 2 处卫星进行统计分析的补充。该计划将显着扩展我们对熄灭卫星并驱动 z 2 静止星系群形成的物理过程的了解，直接解决当前星系形成模型的重大失败问题。此外，库珀博士还将教育和指导代表性不足的学生，作为新的加州大学桥项目的一部分，该项目旨在增加从加州州立大学成功过渡到加州大学天体物理学或物理学研究生院的少数族裔学生的数量。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影响审查标准进行评估，被认为值得支持。

项目成果

A machine learning approach to measuring the quenched fraction of low-mass satellites beyond the Local Group

• DOI: 10.1093/mnras/stab523
• 发表时间: 2021-02
• 期刊: Monthly Notices of the Royal Astronomical Society
• 影响因子: 4.8
• 作者: Devontae C. Baxter;M. Cooper;S. Fillingham

Spectroscopic Confirmation of a Protocluster at z = 3.37 with a High Fraction of Quiescent Galaxies

• DOI: 10.3847/1538-4357/ac2b9f
• 发表时间: 2021-09
• 期刊: The Astrophysical Journal
• 作者: I. McConachie;G. Wilson;Ben Forrest;Z. C. Marsan;A. Muzzin;M. Cooper;M. Annunziatella;D. Marchesini;J. Chan;P. Gomez;Mohamed H. Abdullah;P. Saracco;J. Nantais

The suppression of star formation on the smallest scales: what role does environment play?

在最小尺度上抑制恒星形成：环境起什么作用？

• DOI: 10.1093/mnras/sty3357
• 发表时间: 2018
• 期刊: Monthly Notices of the Royal Astronomical Society
• 影响因子: 4.8
• 作者: Rodriguez Wimberly, M K;Cooper, M C;Fillingham, S P;Boylan-Kolchin, M;Bullock, J S;Garrison-Kimmel, S
• 通讯作者: Garrison-Kimmel, S

Quiescent ultra-diffuse galaxies in the field originating from backsplash orbits

• DOI: 10.1038/s41550-021-01458-1
• 发表时间: 2021-09
• 期刊: Nature Astronomy
• 影响因子: 14.1
• 作者: J. Benavides;L. Sales;M. Abadi;A. Pillepich;D. Nelson;F. Marinacci;M. Cooper;R. Pakmor;P. Torrey;M. Vogelsberger;L. Hernquist

The GOGREEN survey: transition galaxies and the evolution of environmental quenching

GOGREEN 调查：过渡星系和环境猝灭的演化

• DOI: 10.1093/mnras/stab2558
• 发表时间: 2021
• 期刊: Monthly Notices of the Royal Astronomical Society
• 影响因子: 4.8
• 作者: McNab, Karen;Balogh, Michael L;van der Burg, Remco F;Forestell, Anya;Webb, Kristi;Vulcani, Benedetta;Rudnick, Gregory;Muzzin, Adam;Cooper, M C;McGee, Sean
• 通讯作者: McGee, Sean