Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21545603a&link_type=abstract
American Astronomical Society, AAS Meeting #215, #456.03; Bulletin of the American Astronomical Society, Vol. 42, p.478
Astronomy and Astrophysics
Astronomy
Scientific paper
A fundamental issue in our understanding of the evolution of the Milky Way is the existence of an Age-Metallicity-Velocity relation (AMVR) in the nearby disk. However there are still remarkable differences in the form of this relation (e.g Twarog 1980, Meusinger et al. 1991, Edvardsson et al. 1993, Rocha-Pinto et al. 2000, Quillen & Garnett 2000, Feltzing et al. 2001, Holmberg et al. 2007). Moreover we have found considerable differences between the methods and the populations we use for dating the Galaxy and how a selection of the lowest errors in age introduce bias in the relation. Following this idea we are working in a new derivation of the AMVR. We are using a carefully selected subgiants stars from RAVE and Geneva-Copenhagen surveys. RAVE provides accurate kinematics and a first estimate of metallicity, temperature and gravity. Follow-up observations allow us to obtain accurate fundametal parameters and individual abundances in order to derive reliable ages and generate an AMVR for the nearby disk.
Anguiano Borja
de Boer Wylie E.
Freeman Karen
RAVE Collaboration
Steinmetz Matthias
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