À Propos Strange Pulsations of Blue Massive Stars (2509.25892v1)

Abstract: The properties of radial nonlinear pulsations of massive blue stars are computed with the MESA software instrument in its dynamical mode. Pulsational instabilities could be computationally detected and followed if the evolutionary timestep was reduced to a fraction of the unfolding pulsation period. Stellar variability was recovered in regions on the HR plane that have been studied before and that are known to host LBVs and relatives. Mode properties are analyzed on the full stellar-evolution models, which are not in thermal equilibrium. Despite persistent numerical shortcomings, it appears possible to compute strange-mode - like pulsations of massive blue stars with MESA.