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: 1663688
• 负责人: Lars Bildsten
• 金额: $ 82.68万
• 依托单位: University of California-Santa Barbara
• 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=1663688&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MESA软件框架作为天文社区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。MESA（恒星天体物理学实验模块）是一种软件仪器，用于求解控制恒星演化的方程。MESA项目(1)在全世界吸引了900多名注册用户；2)源代码下载量超过1万次；3)已收到超过12,000篇关于MESA社区讨论的存档和可检索的帖子；4)被引1000次左右，目前被引率300次/年左右；5)引用MESA的论文被引用次数超过1万次；6)提供一个软件开发工具包，以构建跨各种平台的MESA；7)每年举办一次暑期学校项目，目前已有150多名毕业生；8)为天文学社区提供一个门户网站，分享知识和工具；9)提供了一个教育云资源的原型，MESA-Web。这些指标提供的证据表明，MESA正在成为理解演化恒星的标准软件。该项目支持MESA软件框架及其用户社区。MESA提供了控制恒星演化的一维全耦合结构和成分方程的求解器。它基于隐式有限体积方案，具有自适应网格细化和复杂的时间步长控制；最先进的模块提供状态方程、不透明度、核反应速率、元素扩散、边界条件和恒星质量的变化。MESA是一个开源库，它采用现代数值方法，支持基于OpenMP的共享内存并行性，并且在设计时考虑了当前和未来的多核和多线程架构。MESA结合了可组合，可互操作，强大，高效，线程安全的数值和物理模块，用于从巨大行星到低质量单恒星再到大质量双星的各种恒星演化场景的溯源模拟。台面吗?S领域的适用性继续增长，最近的扩展使用户能够建模振荡，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一致的结果。MESA项目的产品已经并将继续推动恒星、引力波、核、系外行星、银河系和宇宙学社区的重大创新。

项目成果

A New Class of Roche Lobe–filling Hot Subdwarf Binaries

• DOI: 10.3847/2041-8213/aba3c2
• 发表时间: 2020-07
• 期刊: The Astrophysical Journal Letters
• 作者: T. Kupfer;E. Bauer;K. Burdge;J. Roestel;E. Bellm;J. Fuller;J. Hermes;T. Marsh;L. Bildsten-

Numerical Simulations of Convective Three-dimensional Red Supergiant Envelopes

• DOI: 10.3847/1538-4357/ac5ab3
• 发表时间: 2021-10
• 期刊: The Astrophysical Journal
• 作者: J. A. Goldberg;Y. Jiang 姜;L. Bildsten

The First Ultracompact Roche Lobe–Filling Hot Subdwarf Binary

• DOI: 10.3847/1538-4357/ab72ff
• 发表时间: 2020-02
• 期刊: The Astrophysical Journal
• 作者: T. Kupfer;E. Bauer;T. Marsh;J. Roestel;E. Bellm;K. Burdge;M. Coughlin;J. Fuller;J. Hermes

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.

Increases to Inferred Rates of Planetesimal Accretion due to Thermohaline Mixing in Metal-accreting White Dwarfs

由于金属吸积白矮星中的温盐混合而增加了推断的星子吸积率

• DOI: 10.3847/2041-8213/aac492
• 发表时间: 2018
• 期刊: The Astrophysical Journal
• 作者: Bauer, Evan B.;Bildsten, Lars
• 通讯作者: Bildsten, Lars