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arXiv 1901.08809astro-ph.SR
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恒星脉动理论中存在的问题

Current problems in stellar pulsation theory

Marc-Antoine Dupret

摘要:

随着空间飞行任务的出现,过去十年在星震学和恒星物理学方面取得了重大进展。由于目前振荡光谱的丰富性和精确性,复杂的地震探测技术现在使我们能够精确地确定我们目前恒星结构和演化模型的局限性。然而,地震诊断的准确性取决于脉动模型的准确性。在类太阳振荡中,不准确性的主要来源来自近地表层,在那里振荡是非绝热的,并且与湍流对流强烈耦合。一些脉动恒星旋转得很快,在模拟它们的脉动时必须准确地考虑到这一点。在其他情况下,磁场或动态潮汐可能会发挥一定的作用。本文对星震学的成就和局限性作一综述。

英文摘要:

The last decade lead to major progress in asteroseismology and stellar physics with the advent of space missions. Thanks to the richness and precision of current oscillation spectra, sophisticated seismic probing techniques allow us now to pinpoint the limits of our current models of stellar structure and evolution. However, the accuracy of the seismic diagnosis depends on the accuracy of the pulsation models. In solar-like oscillations, the main source of inaccuracy comes from the near-surface layers where the oscillations are non-adiabatic and strongly coupled with turbulent convection. Some pulsating stars rotate fast and this must be accurately taken into account in the modeling of their pulsations. In others, the magnetic field or the dynamic tides could play some role. I propose here an overview of the great achievements and current limitation of asteroseismology.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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