VI photometry of open clusters (Piatti+ 1998)

Details VI photometry of open clusters (Piatti+ 1998) VI photometry of open clusters (Piatti+ 1998)

Aug 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998ycat..21160263p&link_type=abstract

VizieR On-line Data Catalog: J/ApJS/116/263. Originally published in: 1998ApJS..116..263P

Computer Science

Clusters: Open, Photometry: Ccd

Scientific paper

New CCD VI photometric data for 10 template open clusters with accurately determined fundamental parameters are presented. From the observed V versus V-I diagrams of the clusters, fiducial sequences have been defined and transformed into the Mv versus (V-I)0 diagram by averaging sequences of template open clusters with similar ages. The resulting composite Mv versus (V-I)0 diagram presents a homogeneous set of empirical isochrones in the age range between 5Myr and 4Gyr. These empirical isochrones show an overall very good agreement with those computed from stellar evolutionary models. Theoretical isochrones with moderate overshooting fit the observed main sequences better than the canonical ones for clusters older than 600Myr. The present set of empirical isochrones will be useful for the study of faint reddened open clusters (9 data files).

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