The OCCASO Survey

L. Casamiquela, R. Carrera, C. Jordi, L. Balaguer-N˙˝ez

Galactic Open Clusters (OCs) are key to investigate the formation and evolution of the Galactic disk. However, complete information is available for only ~5% of the about 2100 OCs known in the Milky Way. Therefore OCs are main targets of the Gaia mission and ground spectroscopic surveys. However, these surveys are sampling only Southern OCs (GES, GALAH) or in an heterogeneous way, e.g. different number of stars and spectral types in each system (APOGEE). To complement these surveys we are developing the Open Clusters Chemical Abundances from Spanish OBSERVATORIES Survey (OCCASO). Its goal is to obtain detailed abundances for about 20 chemical species in red clump stars belonging to 25 northern OCs. OCCASO was selected as a Long-term Program in the Canary Islands Observatories and it is obtaining regularly observing time at the Calar Alto Observatory. During the first year and a half we have acquired spectra for more than 90 stars in 18 OCs, 11 of which have its observations completed with at least 6 star
per cluster. In this talk we will describe the survey design and observational strategy and we will present the first results of the chemical abundances obtained in the first year and a half of observations.

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Topic revision: r1 - 2014-11-27 - SusanaBascon
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