Advances in Global and Local Helioseismology: an Introductory Review

TL;DR

This review summarizes recent advances in helioseismology, highlighting progress in understanding solar interior dynamics through global and local methods, and discussing future perspectives in the field.

Contribution

It provides an overview of recent developments in global and local helioseismology, emphasizing new techniques and insights into solar interior processes.

Findings

Progress in understanding solar oscillations

Development of local helioseismology techniques

3D imaging of subsurface solar structures

Abstract

Helioseismology studies the structure and dynamics of the Sun's interior by observing oscillations on the surface. These studies provide information about the physical processes that control the evolution and magnetic activity of the Sun. In recent years, helioseismology has made substantial progress towards the understanding of the physics of solar oscillations and the physical processes inside the Sun, thanks to observational, theoretical and modeling efforts. In addition to the global seismology of the Sun based on measurements of global oscillation modes, a new field of local helioseismology, which studies oscillation travel times and local frequency shifts, has been developed. It is capable of providing 3D images of the subsurface structures and flows. The basic principles, recent advances and perspectives of global and local helioseismology are reviewed in this article.