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Old open clusters as key tracers of Galactic chemical evolution. First results: NGC 3960

Published online by Cambridge University Press:  23 December 2005

P. Sestito ,
A. Bragaglia ,
S. Randich ,
E. Carretta  and
L. Prisinzano
P. Sestito
Affiliation:
INAF-Osservatorio Astronomico di Bologna, Via Ranzani 1, I-40127 Bologna, Italy email: [email protected]
A. Bragaglia
Affiliation:
INAF-Osservatorio Astronomico di Bologna, Via Ranzani 1, I-40127 Bologna, Italy email: [email protected]
S. Randich
Affiliation:
INAF-Osservatorio Astrofisico di Arcetri, Largo Fermi 5, I-50125 Firenze, Italy
E. Carretta
Affiliation:
INAF-Osservatorio Astronomico di Bologna, Via Ranzani 1, I-40127 Bologna, Italy email: [email protected]
L. Prisinzano
Affiliation:
INAF-Osservatorio Astronomico di Palermo, Piazza del Parlamento 1, I-90134, Palermo, Italy
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Abstract

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In the context of a large observational project on old open clusters, we employed FLAMES + UVES on VLT UT2 to collect new high resolution spectra for giant stars in 7 clusters with the aim of investigating the radial abundance distributions in the Galactic disk. The gradients of Fe, α and Fe-peak elements and their evolution with Galactic age are indeed one of the most critical constraints to the star formation history in the Galactic disk and to Galactic chemical evolution models. We present here our preliminary results on the metallicity and abundance ratios for red clump stars in the ∼1 Gyr old cluster NGC 3960, located at a Galactocentric distance $R_{gc}\sim8$ kpc.

Keywords

Stars: abundancesopen clusters and associations: general
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 1 , Symposium S228: From Lithium to Uranium: Elemental Tracers of Early Cosmic Evolution , May 2005 , pp. 409 - 410
Copyright
© 2005 International Astronomical Union