Primera determinación de parámetros fundamentales de los cúmulos abiertos ESO429-SC13, Hogg 3, Haffner 7, BH 87, Berkeley 75, NGC 2368 y NGC 2635

AHUMADA, A. V.; CLARIÁ, J. J.; BICA, E.; DUTRA, C. M.; TORRES, M. C.; PIATTI, A. E.

Congreso; 44o Reunion de la Asoc. Arg. de Astronomia; 2000

Integrated spectroscopic observations in the blue-visible spectral region carried out at CASLEO (San Juan), allowed us to determine for the first time age and interstellar reddening of 7 open clusters of small angular diameter, namely: ESO429-SC13, Hogg 3, Haffner 7, BH 87, Berkeley 75, NGC 2368 and NGC 2635. These parameters were determined on the basis of the measurements of equivalent widths of the Balmer lines, using template spectra of Galactic and Large Magellanic Cloud clusters. Five clusters (ESO429-SC13, Hogg 3, Haffner 7, BH 87 and NGC 2368) were found to be moderately young with ages ranging between 35 and 100 Myr, while the remaining two (Berkeley 75 and NGC 2635) are intermediate-age clusters (1-2 Gyr). All the clusters here studied are scarcely reddened [E(B-V) <= 0.15]. The present sample increases and considerably improves the cluster spectral library around solar metallicity for stellar population synthesis.