We present a photometric investigation in the uvbyβ system of a 20° × 20° field centered at galactic coo......

A photometric study in the uvbyβ system of a 20° × 20° field in direction of the Cas OB6 and Per OB1 ass......

In this paper we study some van den Bergh open clusters combining photometry and astrometry. A model which analyses the ......