Asteroseismology of low-mass stars: the balance between partial ionization and Coulomb interactions

  title={Asteroseismology of low-mass stars: the balance between partial ionization and Coulomb interactions},
  author={Ana Brito and Ilidio P. Lopes},
  journal={Monthly Notices of the Royal Astronomical Society},
  • Ana Brito, I. Lopes
  • Published 25 September 2021
  • Physics
  • Monthly Notices of the Royal Astronomical Society
All cool stars with outer convective zones have the potential to exhibit stochastically excited stellar oscillations. In this work, we explore the outer layers of stars less massive than the Sun. In particular, we have computed a set of stellar models ranging from 0.4 to 0.9 M⊙ with the aim at determining the impact on stellar oscillations of two physical processes occurring in the envelopes of these stars. Namely, the partial ionization of chemical elements and the electrostatic interactions… 

Figures and Tables from this paper


From cool to hot F-stars: the influence of two ionization regions in the acoustic oscillations
The high-precision data available from the Kepler satellite allows us to venture in the study of the complex outer convective envelopes of solar-type stars. We use a seismic diagnostic, specialized
We examine how metallicity affects convection and overshoot in the superadiabatic layer of main sequence stars. We present results from a grid of three-dimensional radiation hydrodynamic simulations
Modules for Experiments in Stellar Astrophysics (MESA) : Convective Boundaries, Element Diffusion, and Massive Star Explosions
We update the capabilities of the software instrument Modules for Experiments in Stellar Astrophysics (MESA) and enhance its ease of use and availability. Our new approach to locating convective
Asteroseismology of solar-type stars
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.
Asteroseismology of Solar-Type and Red-Giant Stars
We are entering a golden era for stellar physics driven by satellite and telescope observations of unprecedented quality and scope. New insights on stellar evolution and stellar interiors physics are
Diagnostics of the External Physical Processes from Global Oscillations of Solar-like Stars
We present and discuss a method to determine the phase shift of the global acoustic oscillations of solar-like stars. This quantity can be used to infer the main contributors of the mechanical
Seismology of stellar envelopes: probing the outer layers of a star through the scattering of acoustic waves
ABSTRA C T The outer layers of Sun-like stars are regions of rapid spatial variation which modulate the p-mode frequencies by partially reflecting the constituent acoustic waves. With the accuracy
Helium settling in F stars: constraining turbulent mixing using observed helium glitch signature
Recent developments in asteroseismology – due to space-based missions such as CoRoT and Kepler – provide handles on those properties of stars that were either completely inaccessible in the past or
An asteroseismic signature of helium ionization
We investigate the influence of the ionization of helium on the low-degree acoustic oscillation frequencies in model solar-type stars. The signature in the oscillation frequencies characterizing the.
Modules for Experiments in Stellar Astrophysics (MESA): Planets, Oscillations, Rotation, and Massive Stars
We substantially update the capabilities of the open source software package Modules for Experiments in Stellar Astrophysics (MESA), and its one-dimensional stellar evolution module, MESA star.