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Centro de Astrofísica da Universidade do Porto
Testing the chemical tagging with old Open Clusters

Sergi Blanco-Cuaresma
Dept. Astronomia i Meteorologia ICCUB-IEEC, Barcelona

Abstract
De Silva et al. 2007 demonstrated the chemical homogeneity of two open clusters and one moving group together with the uniqueness of their abundance patterns. These findings open the possibility of using the technique of chemical tagging to identify common formation sites in the disk as proposed by Freeman & Bland-Hawthorn 2002.

In order to apply this technique to high resolution spectra we have developed our own spectral analysis code, which we have used for the analysis of old Open Clusters observed by NARVAL spectrograph (Bernard Lyot Telescope located at the Pic du Midi in the French Pyrenees). We present the astrophysical parameters (AP) and abundances determined for those clusters and we compare the performance of two of the most popular methods for abundance analysis: synthetic spectral fitting (SSF) and equivalent widths method (EW).

4 December 2013, 13:30

Centro de Astrofísica
Rua das Estrelas
4150-762 Porto

Institute of Astrophysics and Space Sciences

Institute of Astrophysics and Space Sciences (IA) is a new but long anticipated research infrastructure with a national dimension. It embodies a bold but feasible vision for the development of Astronomy, Astrophysics and Space Sciences in Portugal, taking full advantage and fully realizing the potential created by the national membership of the European Space Agency (ESA) and the European Southern Observatory (ESO). IA resulted from the merging the two most prominent research units in the field in Portugal: the Centre for Astrophysics of the University of Porto (CAUP) and the Center for Astronomy and Astrophysics of the University of Lisbon (CAAUL). It currently hosts more than two-thirds of all active researchers working in Space Sciences in Portugal, and is responsible for an even greater fraction of the national productivity in international ISI journals in the area of Space Sciences. This is the scientific area with the highest relative impact factor (1.65 times above the international average) and the field with the highest average number of citations per article for Portugal.

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