Living Reviews in Solar Physics: "Asteroseismology of solar-type stars"
Open Access | Review Article
First Online: 9 September 2019
Until the last few decades, investigations of stellar interiors had been restricted to theoretical studies only constrained by observations of their global properties and external characteristics. However, in the last 30 years the field has been revolutionized by the ability to perform seismic investigations of stellar interiors. This revolution begun with the Sun, where helioseismology has been yielding information competing with what can be inferred about the Earth’s interior from geoseismology. The last two decades have witnessed the advent of asteroseismology of solar-like stars, thanks to a dramatic development of new observing facilities providing the first reliable results on the interiors of distant stars. The coming years will see a huge development in this field. In this review we focus on solar-type stars, i.e., cool main-sequence stars where oscillations are stochastically excited by surface convection. After a short introduction and a historical overview of the discipline, we review the observational techniques generally used, and we describe the theory behind stellar oscillations in cool main-sequence stars. We continue with a complete description of the normal mode analyses through which it is possible to extract the physical information about the structure and dynamics of the stars. We then summarize the lessons that we have learned and discuss unsolved issues and questions that are still unanswered.
Rafael A. García is a senior scientist at the Astrophysics division (DAp) of the Atomic Energy Commission (CEA) in Saclay, France. His research is devoted to study the structure and evolution of solar-like pulsating stars from main sequence to red giants using seismic techniques to probe solar and stellar interiors. In particular, he is interested in solar and stellar dynamics including internal angular momentum evolution and stellar magnetic cycles. He combines observational and data analysis work with the development of new space instrumentation. He is the institutional PI at the CEA of the GOLF instrument onboard SoHO and the ESA M3 PLATO mission in which he is also responsible for 3 scientific working packages.
Jérôme Ballot is a researcher at the IRAP (Institute for Research in Astrophysics and Planetology), CNRS, and Deputy Head of the "Physics of the Sun, Stars and Exoplanets" (PS2E) team, which works on asteroseismology and new generation stellar models, solar and stellar magnetism, basic processes involved in astrophysical fluid dynamics and radiative transfer, as well as on exoplanets and interactions between stars and planets. He also leads the ISSI team "SoFAR – Seismology of Fast Rotating Stars".