Exoplanets: Gaia and the importance of ground based spectroscopy follow-up

The search for extrasolar planets has developed rapidly and, today, more than 1700 planets have been found orbiting stars. Thanks to Gaia, we will collect high-accuracy astrometric orbits of thousands of new low-mass celestial objects, such as extra-solar planets and brown dwarfs. These measurements...

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Bibliographic Details
Published in:arXiv.org 2015-02
Main Authors: Benamati, L, Adibekyan, V Zh, Santos, N C, Sozzetti, A
Format: Article
Language:English
Subjects:
Astrophysics
Brown dwarf stars
Celestial mechanics
Extrasolar planets
Giant stars
Organic chemistry
Planet detection
Planet formation
Planetary evolution
Spectrum analysis
Stellar evolution
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Summary:The search for extrasolar planets has developed rapidly and, today, more than 1700 planets have been found orbiting stars. Thanks to Gaia, we will collect high-accuracy astrometric orbits of thousands of new low-mass celestial objects, such as extra-solar planets and brown dwarfs. These measurements in combination with spectroscopy and with present day and future extrasolar planet search programs (like HARPS, ESPRESSO) will have a crucial contribution to several aspects of planetary astrophysics (formation theories, dynamical evolution, etc.). Moreover, Gaia will have a strong contribution on the stellar chemical and kinematic characterisation studies. In this paper we present a short overview of the importance of Gaia in the context of exoplanet research. As preparatory work for Gaia, we will then present a study where we derived stellar parameters for a sample of field giant stars.
ISSN:2331-8422