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The fourth signature of stellar noise: magnetic cycles

Xavier Dumusque

The Sun presents a 11-year magnetic cycle that is characterized by a variation of the number of magnetic features on its surface. We know that in these magnetic regions the convection is greatly reduced, which implies a redshifted local spectrum. Therefore, a variation of the the number of magnetic features on the solar surface implies a radial-velocity variation...

2011 January 12, 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