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Centro de Astrofísica da Universidade do Porto
Angular Differential Imaging (ADI) of Substellar Companions around Sun-like Stars

Janis Hagelberg
Observatoire Astronomique de l'Université de Genève

Abstract
Direct imaging of extrasolar systems is a powerful but challenging technique. It can give access to Jupiter-like planets on wide orbits, and permit atmospheric characterisations. However, detections are challenging due to the high luminosity contrast and the low separation between the companion and the host star.
I will present one of the most efficient direct detection techniques (ADI), and also present our direct imaging program which is using radial velocity data from our two planet-search surveys, CORALIE and HARPS, to select the most promising targets.
Finally our yet most promising direct detection with VLT/NACO will be presented.

25 May 2011, 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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