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Retired A Stars- Asteroseismic Constraints

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

Abstract
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

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

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