The cores of main sequence intermediate-and high-mass stars are convective. Mixing at the
radiative–convective boundary, waves excited by the convection, and magnetic fields …

In this paper, we review our current understanding of the outer envelope structures of
massive stars based on three-dimensional (3D) radiation hydrodynamic simulations. We …

The blue supergiant (BSG) problem, namely, the overabundance of BSGs inconsistent with
classical stellar evolution theory, remains an open question in stellar astrophysics. Several …

The magnetic dynamo cycle of the Sun features a distinct pattern: a propagating region of
sunspot emergence appears around 30° latitude and vanishes near the equator every 11 …

Context. Blue supergiants (BSGs) are key objects for understanding the evolution of massive
stars, which play a crucial role in the evolution of galaxies. However, discrepancies between …

Recent photometric observations of massive stars have identified a low-frequency power
excess which appears as stochastic low-frequency variability in light-curve observations. We …

Massive stars play a major role not only in stellar evolution but also galactic evolution theory.
This is because of their dynamical interaction with binary companions, but also because …

As a massive star evolves along the main sequence, its core contracts, leaving behind a
stable stratification in helium. We simulate 2D convection in the core at three different stages …

Context. Blue supergiants (BSGs) are key objects for studying the intermediate phases of
massive star evolution because they are very useful to constrain evolutionary models …

Blue supergiants (BSGs) are key objects for understanding the evolution of massive stars.
However, discrepancies between theoretical predictions and empirical observations have …