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The chemical evolution of the Galactic thick and thin disks

Published online by Cambridge University Press:  15 February 2011

C. Turon ,
F. Meynadier ,
F. Arenou  and
C. Chiappini
C. Chiappini*
Affiliation:
Geneva Observatory, Geneva Univ., Switzerland. e-mail: Cristina.Chiappini@unige.ch Osservatorio Astronomico di Trieste, INAF, Italy
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Abstract

Many are the proposed scenarios for the formation of the thick disk of the Milky Way, going from the merger with smaller galaxies to fast gas accretion in the early Universe. Crucial information on which was the dominant mechanism for the formation of the thick disk and other Galactic components is encoded in the chemical properties of their stars. By comparing the chemical properties of bulge, thick and thin disk stars one can address the question of which, among the competing processes of dissipation, satellite accretion and radial migration, play the dominant role in the formation of the different Galactic components. The main difficulty at present is that current data samples suffer from selection biases. Gaia shall bring a quantum leap to the solution of this problem, by providing fiducial samples of the different galactic components with both, chemical and full kinematic information. To pave the road for Gaia, theoretical models need to be improved by taking into account both chemistry and dynamical aspects. A work of this kind is underway in Geneva Observatory.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 45: GAIA: At the Frontiers of Astrometry , 2010 , pp. 293 - 298
Copyright
© EAS, EDP Sciences 2011

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References

Références

Asplund, M., Grevesse, N., Sauval, A., et al., 2009, ARA&A, 47, 1, 481 CrossRef
Barbuy, B., Trevisan, M., Gustafsson, B., et al., 2010, in “Light Elements in the Universe”, Proceedings of the International Astronomical Union, IAU Symposium, 268, 325
Bournaud, F., Elmegree, B.G., & Martig, M., 2009, ApJ, 707, L1 CrossRef
Alvez-Brito, A., Meléndez, J., Asplund, M., et al., 2010, A&A, 513, id.A35
Brunetti, M., Chiappini, C., & Pfenniger, D., 2010, A&A, submitted
Cescutti, G., Matteucci, F., McWilliam, A., & Chiappini, C., 2009, A&A, 505, 605
Chiappini, C., 2009, in “The Galaxy Disk in Cosmological Context”, Proceedings of the International Astronomical Union, IAU Symposium, 254, ed. J. Andersen, J. Bland-Hawthorn, and B. Nordström, 191
da Silva, L., Girardi, L., Pasquini, L., et al., 2006, A&A, 458, 609
Fuhrmann, , 2008, MNRAS, 384, 174
Grenon, M., 1999, Astrophys. Space Science, 265, 331 CrossRef
Haywood, M., 2008, MNRAS, 388, 1175 CrossRef
Matteucci, F., 2008, in “The Origin of the Galaxy and the Local Group”, Proceedings of the 37th Saas-Fee Advanced Course of the Swiss Society for Astrophysics and Astronomy, ed. E. Grebel and B. Moore, in press
Meléndez, , et al., 2008, A&A, 484, L21
Pettini, M., 2009, in “The Galaxy Disk in Cosmological Context”, Proceedings of the International Astronomical Union, IAU Symposium, 254, ed. J. Andersen, J. Bland-Hawthorn, and B. Nordström, 21
Shoenrich, R., & Binney, J., 2009, MNRAS, 399, 1145 CrossRef
Soubiran, C., Bienaymé, O., Mishenina, T.V., & Kovtyukh, V.V., 2008, A&A, 480, 91
Turon, C., Primas, F., Binney, J. Chiappini, C., et al., 2008, “Galactic Populations, Chemistry and Dynamics”, ESA-ESO Working Group report 4, 177
Veltz, L., Bienaymé, O., Freeman, K.C., et al., 2008, A&A, 480, 753