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New Post-AGB star models as tools to understand AGB evolution and nucleosynthesis
Devika Kamath, Flavia Dell'Agli, Paolo Ventura +3
We study a sample of post-AGB stars in the Galaxy, with known surface chemical composition and s-process enrichment. The recent determination of the luminosities of these sources,…
Luminosities and masses of single Galactic Post-Asymptotic Giant Branch (Post-AGB) stars with distances from EDR3: The revelation of an -process diversity
Devika Kamath, Hans Van Winckel, Paolo Ventura +4
Post-AGB stars are exquisite probes of AGB nucleosynthesis. However, the previous lack of accurate distances jeopardised comparison with theoretical AGB models. The Early Da…
Orbital and atmospheric parameters of two wide O-type subdwarf binaries: BD11162 and Feige 80
Francisco Molina, Joris Vos, Péter Németh +4
There are 23 long-period binary systems discovered to date that contain a B-type hot subdwarf(sdB) whose orbital parameters have been fully solved. They evolve into O-type subdwarf…
Atmosphere of Betelgeuse before and during the Great Dimming event revealed by tomography
K. Kravchenko, A. Jorissen, S. Van Eck +7
Despite being the best studied red supergiant star in our Galaxy, the physics behind the photometric variability and mass loss of Betelgeuse is poorly understood. Moreover, recentl…