Arthur Le Saux, Armand Leclerc, Guillaume Laibe, Pierre Delplace and Antoine Venaille
{"title":"A Core-sensitive Mixed f/g-mode of the Sun Predicted by Wave Topology and Hydrodynamical Simulation","authors":"Arthur Le Saux, Armand Leclerc, Guillaume Laibe, Pierre Delplace and Antoine Venaille","doi":"10.3847/2041-8213/ade396","DOIUrl":null,"url":null,"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.","PeriodicalId":501814,"journal":{"name":"The Astrophysical Journal Letters","volume":"24 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2025-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"The Astrophysical Journal Letters","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.3847/2041-8213/ade396","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
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.