SMuK 2023 – scientific programme

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EP: Fachverband Extraterrestrische Physik

EP 14: Astrophysics: Stellar Astrophysics

EP 14.2: Talk

Friday, March 24, 2023, 11:30–11:45, HSZ/0004

Stellar oscillations in B supergiant stars. — •Julieta Paz Sanchez Arias¹, Matias Agustin Ruiz Diaz², and Peter Nemeth^1,3 — ¹Astronomical Institute, Czech Academy of Sciences. Ondrejov, Czech Republic — ²Instituto de Astrofísica de La Plata. CONICET-UNLP. La Plata, Argentina — ³Astroserver.org, Foter 1, 8533 Malomsok, Hungary

The evolution of massive stars depends on many stellar parameters and small changes in them during the evolution of the stars can yield widely diverging outcomes. Additionally, these parameters, such as the initial mass, metalicity, mass loss rate and the type and distribution of chemical mixing in their interiors are far from being firmly established. B supergiant stars are one peculiar group of massive stars that undergo stellar oscillations. These objects can be found in different evolutionary stages. The study of their spectra provides us with information on the surface chemical abundances left by their evolution and the current mass loss rate. On the other hand, the study of stellar oscillations is a powerful tool that allows to inspect the stellar interiors through the analysis of the light curves and numerical simulations of their evolution, interior and oscillations. In this work, we combine both tools to unveil the physical parameters involved in the evolution of 3 B supergiant stars in different stages of their evolution but sharing the same location in the Hertzsprung-Russell diagram.