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Centro de Astrofísica da Universidade do Porto
Mitigating stellar signals in the quest for other Earths

Xavier Dumusque
CAUP

Abstract
Nowadays, after having found hundreds of exoplanets, the radial-velocity (RV) technique starts to be limited by intrinsic stellar signals.
Indeed, at the level of the best spectrographs, one starts to see the effects induced by stellar pressure waves, convection, surface activity coupled with stellar rotation, and magnetic cycles.
The questions of how to extract and analyse the different types of stellar signals from RV data, and how to mitigate their contribution will be presented in detail.

19 December 2012, 13:30

Centro de Astrofísica
Rua das Estrelas
4150-762 Porto

Institute of Astrophysics and Space Sciences

Institute of Astrophysics and Space Sciences (IA) is a new but long anticipated research infrastructure with a national dimension. It embodies a bold but feasible vision for the development of Astronomy, Astrophysics and Space Sciences in Portugal, taking full advantage and fully realizing the potential created by the national membership of the European Space Agency (ESA) and the European Southern Observatory (ESO). IA resulted from the merging the two most prominent research units in the field in Portugal: the Centre for Astrophysics of the University of Porto (CAUP) and the Center for Astronomy and Astrophysics of the University of Lisbon (CAAUL). It currently hosts more than two-thirds of all active researchers working in Space Sciences in Portugal, and is responsible for an even greater fraction of the national productivity in international ISI journals in the area of Space Sciences. This is the scientific area with the highest relative impact factor (1.65 times above the international average) and the field with the highest average number of citations per article for Portugal.

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