A Core-sensitive Mixed f/g-mode of the Sun Predicted by Wave Topology and Hydrodynamical Simulation

Arthur Le Saux, Armand Leclerc, Guillaume Laibe, Pierre Delplace and Antoine Venaille
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Abstract

Helioseismology has revolutionized our understanding of the Sun by analyzing its global oscillation modes. However, the solar core remains elusive, limiting a full understanding of its evolution. In this work, we study a previously unnoticed global oscillation mode of the Sun using a fully compressible hydrodynamical simulation of the solar interior and assess that it is a mixed f/g-mode with a period of about 1 hr. This is the first global stellar hydrodynamics simulation to successfully couple compressible and gravity modes. To understand this coupling, we invoke a recent theory on the nature of f-modes seen through the prism of wave topology, characterizing their ability to propagate deep into stellar interiors. We demonstrate that the mixed f/g-mode is highly sensitive to the core’s rotation rate, providing a new promising pathway to explore the Sun’s core.
用波拓扑和流体力学模拟预测太阳的核敏感混合f/g模式
日震学通过分析太阳的全球振荡模式彻底改变了我们对太阳的认识。然而,太阳核心仍然难以捉摸,限制了对其演变的全面理解。在这项工作中,我们使用太阳内部的完全可压缩流体动力学模拟研究了以前未被注意到的太阳全球振荡模式,并评估它是一个周期约为1小时的混合f/g模式。这是首次成功地将可压缩模式和重力模式耦合在一起的全球恒星流体动力学模拟。为了理解这种耦合,我们引用了最近关于通过波拓扑棱镜看到的f模式本质的理论,描述了它们深入恒星内部传播的能力。我们证明了混合的f/g模式对核心的旋转速率高度敏感,为探索太阳核心提供了一个新的有希望的途径。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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