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The promise of Gaia and how it will influence stellar ages

Published online by Cambridge University Press:  01 October 2008

Carla Cacciari
Carla Cacciari*
Affiliation:
INAF, Osservatorio Astronomico di Bologna, Via Ranzani 1, 40127 Bologna, Italy email: carla.cacciari@oabo.inaf.it
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Abstract

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The Gaia space project, planned for launch in 2011, is one of the ESA cornerstone missions, and will provide astrometric, photometric and spectroscopic data of very high quality for about one billion stars brighter than V = 20. This will allow to reach an unprecedented level of information and knowledge on several of the most fundamental astrophysical issues, such as mapping of the Milky Way, stellar physics (classification and parameterization), Galactic kinematics and dynamics, study of the resolved stellar populations in the Local Group, distance scale and age of the Universe, dark matter distribution (potential tracers), reference frame (quasars, astrometry), planet detection, fundamental physics, Solar physics, Solar system science.

I will present a description of the instrument and its main characteristics, and discuss a few specific science cases where Gaia data promise to contribute fundamental improvement within the scope of this Symposium.

Keywords

space vehiclesastrometrystars: distancesstars: kinematicsstars: fundamental parametersGalaxy: stellar contentGalaxy: fundamental parametersGalaxy: formationGalaxy: evolutiongalaxies: stellar content
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 4 , Symposium S258: The Ages of Stars , October 2008 , pp. 409 - 418
Copyright
Copyright © International Astronomical Union 2009

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