Probing the Fossils of the Local Group using Petascale Adaptive Mesh Galaxy Simulations

使用 Petascale 自适应网格星系模拟探测本地群的化石

• 批准号: 1810584
• 负责人: Brian O'Shea
• 金额: $ 1.4万
• 依托单位: Michigan State University
• 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: 2018-08-01 至 2019-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1810584&HistoricalAwards=false
• 关键词: Probing; Fossils; Local; Group; using

The goal of this project is to unlock fundamental breakthroughs in galaxy formation with large-scale numerical simulations on the Blue Waters supercomputer. These simulations will resolve the smallest building blocks of galaxies and their star formation histories, allowing for direct measurements of the consequences of the numerical calculations. The complexity of the included physics will lead to the creation of rich data sets that address many key issues relating to star formation histories, chemical evolution, early galaxy assembly, and the observable properties of galaxies. Furthermore, the simulation data produced during the course of this project, as well as a wide range of other data products, will be made publicly available for use by the broader astrophysical community.The project will answer several pressing, observational motivated questions about low-mass and metal-poor galaxies by using the Blue Waters supercomputer to perform a suite of sophisticated, high dynamic range adaptive mesh simulations of cosmological structure formation. These simulations will probe the early history of the Local Group of galaxies in great detail, and will directly connect the largest of these early galaxies to their relics, which can be found among the present-day Local Group dwarf galaxies. The project will address four specific questions about galaxy formation: 1. What are the key physical mechanisms that control galaxy formation at the earliest epochs, and how do they differ from the ones in larger galaxies forming at later times? 2. If the seeds of supermassive black holes form from the first generation of stars, how do they grow over the first billion years of cosmic evolution? 3. What are the physical characteristics of the remnants of early galaxy formation in the Local Group, and what information about their formation is retained by the stellar populations of those galaxies? 4. What are the unique observational signatures of the earliest galaxies, both at high redshift and the present day? The team contains experts in galaxy formation and high performance computing, as well as the use of a sophisticated numerical tool, specifically the Enzo code. The Enzo code that has been demonstrated to scale and perform well on the Blue Waters supercomputer. The project will apply the simulations to the interpretation of measurements of both local and distant galaxies from current astronomical surveys, and to motivate future observational campaigns.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.

该项目的目标是通过 Blue Waters 超级计算机上的大规模数值模拟来实现星系形成的根本性突破。这些模拟将解析星系的最小组成部分及其恒星形成历史，从而可以直接测量数值计算的结果。所包含的物理学的复杂性将导致丰富的数据集的创建，这些数据集解决了与恒星形成历史、化学演化、早期星系组装和星系可观测特性有关的许多关键问题。此外，在该项目过程中产生的模拟数据以及各种其他数据产品将公开供更广泛的天体物理学界使用。该项目将回答几个有关低-通过使用 Blue Waters 超级计算机对宇宙结构形成进行一套复杂的、高动态范围自适应网格模拟，来分析质量和贫金属星系。这些模拟将详细探讨本星系群的早期历史，并将这些早期星系中最大的星系与其遗迹直接联系起来，这些遗迹可以在当今的本星系群矮星系中找到。 该项目将解决有关星系形成的四个具体问题： 1. 控制最早时期星系形成的关键物理机制是什么，它们与后来形成的较大星系的机制有何不同？ 2. 如果超大质量黑洞的种子是由第一代恒星形成的，那么它们在宇宙演化的前十亿年中是如何生长的？ 3. 本星系群中早期星系形成残余物的物理特征是什么？这些星系的恒星群保留了有关其形成的哪些信息？ 4. 最早的星系在高红移和现在都有哪些独特的观测特征？该团队由星系形成和高性能计算以及复杂数值工具（特别是 Enzo 代码）使用方面的专家组成。 Enzo 代码已被证明可以在 Blue Waters 超级计算机上扩展并表现良好。该项目将应用模拟来解释当前天文调查对本地和遥远星系的测量结果，并激励未来的观测活动。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力优势和能力进行评估，被认为值得支持。更广泛的影响审查标准。

项目成果

The Impact of Enhanced Halo Resolution on the Simulated Circumgalactic Medium

增强光环分辨率对模拟环银河系介质的影响

• DOI: 10.3847/1538-4357/ab378f
• 发表时间: 2018-11-29
• 期刊: The Astrophysical Journal
• 作者: C. Hummels;Britton D. Smith;P. Hopkins;B. O’Shea;Devin W. Silvia;J. Werk;N. Lehner;J. Wise;D. Collins;Iryna S. Butsky
• 通讯作者: Iryna S. Butsky

The growth of black holes from Population III remnants in the Renaissance simulations

文艺复兴模拟中第三族残骸中黑洞的增长

• DOI: 10.1093/mnras/sty2103
• 发表时间: 2018-04-17
• 期刊: Monthly Notices of the Royal Astronomical Society
• 影响因子: 4.8
• 作者: Britton D. Smith;J. Regan;T. Downes;M. Norman;B. O’Shea;J. Wise
• 通讯作者: J. Wise

Figuring Out Gas & Galaxies in Enzo (FOGGIE). I. Resolving Simulated Circumgalactic Absorption at 2 ≤ z ≤ 2.5

计算出气体

• DOI: 10.3847/1538-4357/ab0654
• 发表时间: 2018-10-15
• 期刊: The Astrophysical Journal
• 作者: M. Peeples;L. Corlies;J. Tumlinson;B. O’Shea;N. Lehner;John M. O’Meara;J. Howk;N. Earl;Britton D. Smith;J. Wise;C. Hummels
• 通讯作者: C. Hummels