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Centro de Astrofísica da Universidade do Porto
Towards precise and accurate exoplanet mass determinations: HARPS-N observes the Sun

Raphaëlle D. Haywood
Harvard-Smithsonian Center for Astrophysics

The HARPS-N spectrograph is now operating with a new solar telescope feed since July 2015. I will present early results from the first 11 months of HARPS-N observations of the Sun as a star, with a particular focus on our investigations aimed at understanding radial-velocity variations induced by the Sun’s surface activity (sunspots, faculae/plage, granulation).
This solar dataset is also key to improving our wavelength calibration and data reduction techniques, and to designing more efficient observing strategies for the stars targeted by HARPS-N at nighttime.

25 May 2016, 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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