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Retired A Stars- Asteroseismic Constraints

Thomas S. H. North
School of Physics and Astronomy, University of Birmingham, UK

Through Kepler and K2 observations of evolved planet hosts, we hope to resolve the "Retired A Star problem". Why do evolved stars show a different exoplanet host mass distribution to dwarfs? A selection bias, have the stellar masses for evolved stars derived from stellar models been overestimated, or do they represent a separate population of exoplanets. Asteroseismic observations of 5 evolved stars are presented, where we also incorporate the recent Gaia DR1 parallaxes to address the problem

2016 October 20, 13:30

Centro de Astrofísica da Universidade do Porto (Classroom)
Rua das Estrelas, 4150-762 Porto

Faculdade de Ciências da Universidade de Lisboa Universidade do Porto Faculdade de Ciências e Tecnologia da Universidade de Coimbra
Fundação para a Ciência e a Tecnologia COMPETE 2020 PORTUGAL 2020 União Europeia