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Determination of sulphur abundances in HARPS-GTO sample

Ana Rita Costa Silva
University of Hertfordshire / IA

The determination of elemental abundances in stars can provide tremendous knowledge regarding the chemical evolution of galaxies in our Universe. In particular, alpha-elements, such as sulphur, are very helpful due to being heavily produced by type II supernovae and not as much by type Ia. However, due to large uncertainties in the derivations, there haven't been many studies about this element, and thus some characteristics of its behaviour have not been fully understood yet. I will present the work I have developed during my internship, where sulphur abundances were derived for a sample of ~1000 solar neighbourhood stars, obtained with HARPS-GTO. The ratios of sulphur over iron were analysed in the contexts of galactic chemical evolution and also planet-host vs non-planet-host stars.

2019 June 25, 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