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Gaia capability of constraining the MW spiral arms from thedisc velocity distribution

Published online by Cambridge University Press:  15 February 2011

C. Turon ,
F. Meynadier ,
F. Arenou ,
T. Antoja ,
F. Figueras  and
M. Monguió
T. Antoja
Affiliation:
DAM and IEEC-UB, Institut de Ciencies del Cosmos de la Universitat de Barcelona, Spain. e-mail: [email protected]
F. Figueras
Affiliation:
DAM and IEEC-UB, Institut de Ciencies del Cosmos de la Universitat de Barcelona, Spain. e-mail: [email protected]
M. Monguió
Affiliation:
DAM and IEEC-UB, Institut de Ciencies del Cosmos de la Universitat de Barcelona, Spain. e-mail: [email protected]
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Abstract

The resonances of the bar and the spiral arms of the Milky Way (MW) can induce kinematicgroups in the local stellar velocity distribution. The Gaia mission is going to provide uswith accurate information on the velocity distribution for an extended region of theGalactic disc. Here we aim to evaluate the Gaia capabilities to constrain thenon-axisymmetric large-scale structure of the MW from the observed velocitydistributions.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 45: GAIA: At the Frontiers of Astrometry , 2010 , pp. 309 - 312
Copyright
© EAS, EDP Sciences 2011

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