Collaborative Research: SI2-SSI: Modules for Experiments in Stellar Astrophysics

合作研究：SI2-SSI：恒星天体物理实验模块

• 批准号: 1663696
• 负责人: Richard Townsend
• 金额: $ 68.35万
• 依托单位: University of Wisconsin-Madison
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2017
• 资助国家: 美国
• 起止时间: 2017-05-01 至 2023-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1663696&HistoricalAwards=false
• 关键词: Collaborative; Research; SI2; SSI; Modules

Stars are the most commonly observed celestial objects, and remain at the forefront of astronomical research. The goal of this project is to sustain the MESA software framework as a key piece of software infrastructure for the astronomy community while building new innovative scientific capabilities and educational networks. MESA (Modules for Experiments in Stellar Astrophysics) is a software instrument that solves the equations governing the evolution of stars. The MESA project 1) has attracted over 900 registered users world-wide; 2) has over 10,000 downloads of the source code; 3) has received over 12,000 archived and searchable posts about community discussions of MESA; 4) has been cited about 1000 times and has a current citation rate of about 300/year; 5) papers that cite MESA have themselves generated over 10,000 citations; 6) provides a Software Development Kit to build MESA across a variety of platforms; 7) delivers an annual Summer School program that now has over 150 graduates; 8) hosts a web-portal for the astronomy community to share knowledge and tools; 9) offers a prototype of a cloud resource for education, MESA-Web. These metrics provide evidence that MESA is becoming standard software for understanding evolving stars. This project supports the MESA software framework and its user community. MESA provides solvers for one-dimensional fully coupled structures and composition equations governing stellar evolution. It is based on an implicit finite volume scheme with adaptive mesh refinement and sophisticated time-step controls; state-of-the-art modules provide equation of state, opacity, nuclear reaction rates, element diffu- sion, boundary conditions, and changes to the mass of the star. MESA is an open source library that employs contemporary numerical approaches, supports shared memory parallelism based on OpenMP, and is designed with present and future multi-core and multi-thread architectures in mind. MESA combines composable, interoperable, robust, efficient, thread-safe numerical and physics modules for provenance-capable simulations of a wide range of stellar evolution scenarios ranging from giant planets to low mass single stars to massive star binaries. MESA?s domain of applicability continues to grow, with recent extensions enabling users to model oscillations, rota- tion, binary stars, and explosions. Recent technical innovations allow for user plugins and provide bit-for-bit consistent results across all supported platforms. The products of the MESA project has driven and will continue to drive significant innovation in the stellar, gravitational wave, nuclear, exoplanet, galactic, and cosmological communities.

恒星是最常被观测到的天体，也是天文学研究的前沿。 该项目的目标是维持梅萨软件框架作为天文学界软件基础设施的关键部分，同时建立新的创新科学能力和教育网络。梅萨（Modules for Experiments in Stellar Astrophysics，恒星天体物理学实验模块）是一种软件工具，用于求解控制恒星演化的方程。 梅萨项目1）在全球范围内吸引了900多名注册用户; 2）源代码下载次数超过10，000次; 3）收到了12，000多个关于梅萨社区讨论的存档和可搜索帖子; 4）被引用约1000次，目前的引用率约为300/年; 5）引用梅萨的论文本身产生了超过10，000次引用; 6）提供软件开发工具包，以在各种平台上构建梅萨; 7）提供年度暑期学校计划，目前已有150多名毕业生; 8）为天文学界提供了一个门户网站，以分享知识和工具; 9）提供了一个用于教育的云资源MESA-Web原型。 这些指标提供的证据表明，梅萨正在成为理解演化恒星的标准软件。 该项目支持梅萨软件框架及其用户社区。梅萨为一维完全耦合结构和控制恒星演化的组成方程提供了求解器。它是基于一个隐式有限体积方案与自适应网格细化和复杂的时间步长控制;国家的最先进的模块提供状态方程，不透明度，核反应速率，元素锡永，边界条件，并改变了质量的星星。梅萨是一个开源库，采用当代数值方法，支持基于OpenMP的共享内存并行性，并在设计时考虑了当前和未来的多核和多线程架构。梅萨结合了可组合的，可互操作的，强大的，高效的，线程安全的数值和物理模块，用于从巨行星到低质量单星到大质量星星双星的各种恒星演化场景的起源模拟。梅萨？的应用领域继续增长，最近的扩展使用户能够模拟振荡，旋转，双星和爆炸。最近的技术创新允许用户插件，并在所有支持的平台上提供逐位一致的结果。 梅萨项目的产品已经并将继续推动恒星、引力波、核、系外行星、银河系和宇宙学领域的重大创新。

项目成果

The Impact of White Dwarf Luminosity Profiles on Oscillation Frequencies

• DOI: 10.3847/2041-8213/aae70f
• 发表时间: 2018-10
• 期刊: The Astrophysical Journal Letters
• 作者: Francis Timmes;R. Townsend;E. Bauer;A. Thoul;C. Fields;W. M. Wolf

The effects of surface fossil magnetic fields on massive star evolution – II. Implementation of magnetic braking in mesa and implications for the evolution of surface rotation in OB stars

• DOI: 10.1093/mnras/staa237
• 发表时间: 2020-01
• 期刊: Monthly Notices of the Royal Astronomical Society
• 影响因子: 4.8
• 作者: Z. Keszthelyi;Z. Keszthelyi;Z. Keszthelyi;G. Meynet;M. Shultz;A. David-Uraz;A. ud-Doula;R. Townse

Modules for Experiments in Stellar Astrophysics (MESA): Pulsating Variable Stars, Rotation, Convective Boundaries, and Energy Conservation

• DOI: 10.3847/1538-4365/ab2241
• 发表时间: 2019-07-01
• 期刊: ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
• 影响因子: 8.7
• 作者: Paxton, Bill;Smolec, R.;Timmes, F. X.
• 通讯作者: Timmes, F. X.

A new window to tidal asteroseismology: non-linearly excited stellar eigenmodes and the period spacing pattern in KOI-54

潮汐星震学的新窗口：KOI-54 中的非线性激发恒星本征模和周期间隔模式

• DOI: 10.1093/mnras/stac2611
• 发表时间: 2022
• 期刊: Monthly Notices of the Royal Astronomical Society
• 影响因子: 4.8
• 作者: Guo, Zhao;Ogilvie, Gordon I.;Li, Gang;Townsend, Richard H. D.;Sun, Meng
• 通讯作者: Sun, Meng

Strong Variability in AzV 493, an Extreme Oe-type Star in the SMC

SMC 中的极端大江型恒星 AzV 493 具有很强的变异性

• DOI: 10.3847/1538-4357/acb690
• 发表时间: 2023
• 期刊: The Astrophysical Journal
• 作者: Oey, M. S.;Castro, N.;Renzo, M.;Vargas-Salazar, I.;Suffak, M. W.;Ratajczak, M.;Monnier, J. D.;Szymanski, M. K.;Phillips, G. D.;Calvet, N.
• 通讯作者: Calvet, N.