Göttingen 2025 – wissenschaftliches Programm

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EP: Fachverband Extraterrestrische Physik

EP 10: Poster Session

EP 10.6: Poster

Donnerstag, 3. April 2025, 11:00–12:30, ZHG Foyer 1. OG

OCEANS - Overcoming challenges in the evolution and nature of massive stars — •Michaela Kraus and The OCEANS Consortium — Astronomical Institute AV CR, Ondrejov, Czech Republic

Massive stars are the cornerstone of the dynamic and chemical evolution of the cosmos, enriching it as they evolve with chemically processed material that is blown away from their surface by energetic winds and eruption processes. Despite their importance, their evolution from cradle to death as spectacular supernova explosions still poses many mysteries due to crucial knowledge gaps in the physical processes taking place in their interior and atmosphere and the mutual influence by close-by siblings. This poster presents the project OCEANS funded by the European Union. Our goal is to elucidate the physical properties and evolution of massive stars impacted by companions, as well as their contribution to the generation of gravitational waves. For this, we established a multidisciplinary, international network of researchers from Europe and America with expertise in various disciplines, and with background in both theory and observations. We exploit the avalanche of public data archives and develop machine learning algorithms to detect massive stars in binary and multiple systems, classify them, and create statistically meaningful samples for diverse evolutionary states. We also develop progressive methods of signal processing for the analysis of the stellar properties, and cutting-edge numerical codes to unveil the impact of stellar interaction and mass ejection on the evolution of the stars and stellar systems.

Keywords: stellar winds and outflows; stellar evolution; stellar pulsations; interacting binaries; astrostatistics