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Centro de Astrofísica da Universidade do Porto

Gaia and the search for other planets: combining astrometry and radial velocity

L. Benamati

Abstract.
Extensive radial-velocity follow-up campaigns of planetary systems detected by Gaia will be particularly valuable to a) search for undetected lowmass planets, b) help to characterize short-period companions, c) deepen our understanding of the orbital architectures of planets orbiting distant young stars, d) improve the phase coverage for planets on orbital periods longer than the timeline of the Gaia measurements, and e) refine the characterization of multiple-planet systems where the number of free fitting parameters will be similar to the number of Gaia measurements. The main focus of my project is on the development of tools to carry out simultaneous radial-velocity and astrometric orbital fits because it will allow us to derive more precise parameters.

Planet Formation and Evolution 2012
8th Conference on Formation and Evolution of Planetary Systems
München, Germany
September 2012

Type: Poster

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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