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Centro de Astrofísica da Universidade do Porto

Stellar Noise in Exoplanet Searches

P. Figueira

Abstract
The search for extrasolar planets relies strongly on indirect methods. The most successful of these, the radial velocity method, is particularly vulnerable to contamination by stellar phenomena. In this short review I discuss the different physical phenomena behind the radial-velocity signals stemming from the star, and how they might be misinterpreted as originating in a planetary companion or preclude its detection. I also present some techniques proposed for minimizing their impact and conclude by stating their importance in the context of very high-precision radial-velocity instruments and their scientific goals.

New Quests in Stellar Astrophysics III: A Panchromatic View of Solar-like Stars, With and Without Planets
(Eds.) M. Chavez, E. Bertone, O. Vega, V. De la Luz

Astronomical Society of the Pacific
Vol. 472, Page 137
2013

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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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