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Centro de Astrofísica da Universidade do Porto

The HARPS search for southern extra-solar planets
XII. A giant planet orbiting the metal-poor star HD171028

N. C. Santos, M. Mayor, F. Bouchy, F. Pepe, D. Queloz, S. Udry

In this paper we present the detection of a 1.8MJup planet in a 538 day period trajectory orbiting the metal-poor star HD171028 ([Fe/H]=−0.49). This planet is the first to be discovered in the context of a HARPS program searching for planets around metalpoor
stars. Interestingly, HD171028 is one of the least metal-poor stars in the sample. This discovery is placed in the context of the models of planet formation and evolution.

stars: planetary systems – planetary systems: formation – techniques: radial velocity – stars: abundances

Astronomy and Astrophysics
Volume 474, Page 647
November 2007

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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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