MODULES FOR EXPERIMENTS IN STELLAR ASTROPHYSICS (MESA): PLANETS, OSCILLATIONS, ROTATION, AND MASSIVE STARS
MODULES FOR EXPERIMENTS IN STELLAR ASTROPHYSICS (MESA): PLANETS, OSCILLATIONS, ROTATION, AND MASSIVE STARS
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DOI：
10.1088/0067-0049/208/1/4
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发表时间：
2013-01
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影响因子：
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通讯作者：
B. Paxton;M. Cantiello;P. Arras;L. Bildsten;E. Brown;A. Dotter;C. Mankovich;M. Montgomery;D. S
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作者：
B. Paxton;M. Cantiello;P. Arras;L. Bildsten;E. Brown;A. Dotter;C. Mankovich;M. Montgomery;D. S
我们大幅更新了恒星天体物理学实验开源软件包MESA及其一维恒星演化模块MESAstar的功能。MESAstar对巨行星演化建模能力的提升使其适用范围现在扩展到质量低至木星质量的十分之一。基于太空的开普勒和CoRoT任务使星震学有了巨大进步，这促使我们将ADIPLS绝热脉动代码与MESAstar完全耦合。这也促使对勒杜克判据进行数值改写，当许多原子核以不可忽略的丰度存在时，这种改写更容易实现。这影响了MESAstar计算半对流和热盐混合的方式。我们展示了3 - 8倍太阳质量的恒星从核心氦燃烧结束、氦热脉冲开始到到达白矮星冷却序列的演化过程。我们实现了角动量和化学丰度的扩散，从而能够计算旋转恒星模型，并将其与早期工作进行了全面比较。我们引入了一种对辐射主导的包层的新处理方法，使得大质量恒星能够不间断地演化到核心坍缩。这使得能够生成新的超新星、长伽马射线暴和对不稳定性前身星模型。我们大幅修改了MESAstar求解完全耦合的恒星结构和成分方程的方式，并展示了这如何提高了MESA在多核处理器上计算速度的扩展性。还提供了状态方程、不透明度、核反应率和大气边界条件等模块的更新。我们描述了MESA软件开发工具包，它打包了形成一个统一、可维护且经过良好验证的MESA构建环境所需的所有组件。我们还强调了社区开发的一些用于快速可视化MESAstar结果的工具。
We substantially update the capabilities of the open source software package Modules for Experiments in Stellar Astrophysics (MESA), and its one-dimensional stellar evolution module, MESAstar. Improvements in MESAstar's ability to model the evolution of giant planets now extends its applicability down to masses as low as one-tenth that of Jupiter. The dramatic improvement in asteroseismology enabled by the space-based Kepler and CoRoT missions motivates our full coupling of the ADIPLS adiabatic pulsation code with MESAstar. This also motivates a numerical recasting of the Ledoux criterion that is more easily implemented when many nuclei are present at non-negligible abundances. This impacts the way in which MESAstar calculates semi-convective and thermohaline mixing. We exhibit the evolution of 3–8 M☉ stars through the end of core He burning, the onset of He thermal pulses, and arrival on the white dwarf cooling sequence. We implement diffusion of angular momentum and chemical abundances that enable calculations of rotating-star models, which we compare thoroughly with earlier work. We introduce a new treatment of radiation-dominated envelopes that allows the uninterrupted evolution of massive stars to core collapse. This enables the generation of new sets of supernovae, long gamma-ray burst, and pair-instability progenitor models. We substantially modify the way in which MESAstar solves the fully coupled stellar structure and composition equations, and we show how this has improved the scaling of MESA's calculational speed on multi-core processors. Updates to the modules for equation of state, opacity, nuclear reaction rates, and atmospheric boundary conditions are also provided. We describe the MESA Software Development Kit that packages all the required components needed to form a unified, maintained, and well-validated build environment for MESA. We also highlight a few tools developed by the community for rapid visualization of MESAstar results.