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Determination of fundamental parameters of stars through optical interferometry

Karine Perraut
IPAG, Grenoble

Direct measurement of stellar diameters is fundamental for determining properties of stars, in particuliar the linear radius and the effective temperature. These properties provide the link between theory of stellar structure and evolution to model atmospheres. For nearby, main-sequence stars, whose distances are well known, the angular diameters are difficult to measure due to their small sizes compared to their evolved counterparts. Recently, high angular resolution provided by long-baseline optical interferometry has enabled the photospheric disks of such nearby stars to be resolved. These measurements has provided clues for studying the physical processus at play. I will briefly explain the principle of long-baseline interferometry and present the recent results obtained on several fields of stellar physics as GAIA benchmark stars, planet host stars, or pulsating A stars.

2016 February 10, 13:30

Centro de Astrofísica da Universidade do Porto (Auditorium)
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