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Combined metallicity and dynamical evolution of an isothermal disk

Published online by Cambridge University Press:  22 December 2003

C. Boily ,
P. Patsis ,
S. Portegies ,
R. Spurzem ,
C. Theis ,
A. Siebert ,
O. Bienaymé  and
C. Soubiran
A. Siebert
Affiliation:
Observatoire de Strasbourg, UMR 7550, 11 rue de l'Université, 67000 Strasbourg, France and Steward Observatory, Tucson, AZ 85721-0065, USA
O. Bienaymé
Affiliation:
Observatoire de Strasbourg, UMR 7550, 11 rue de l'Université, 67000 Strasbourg, France and Steward Observatory, Tucson, AZ 85721-0065, USA
C. Soubiran
Affiliation:
Observatoire Aquitain des Sciences de l'Univers, UMR 5804, 2 rue de l'Observatoire, 33270 Floirac, France
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Abstract

A simple model for the evolution of an isothermal disk has been developed. It combines both the chemical evolution (through the Age-Metallicity Relation) and dynamical evolution (through the age-dispersion relation). Applying this model to a sample of Red Clump Stars from the Tycho-2 catalog, observed with the high resolution echelle spectrograph Elodie at the Observatoire de Haute Provence, we derive the underlying Star Formation History and compare it with local determinations using chromospheric activity survey by Rocha-Pinto et al. (2000b).

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 10: JENAM 2002, Galactic & Stellar Dynamics , 2003 , pp. 215
Copyright
© EAS, EDP Sciences, 2003

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