Fundamental parameters of six Galactic open clusters determined by means of integrated spectroscopy

A.V. AHUMADA; J.J. CLARIÁ; E. BICA; D.B. PAVANI; M.C. PARISI; T. PALMA

Malargüe - Argentina

Congreso; 50 Reunión de la Asociación Argentina de Astronomía; 2007

We present .ux-calibrated integrated spectra for 6 small angular diameter Galactic open clusters: Ruprecht 158, BH92, BH121, Collinder 258, ESO065-SC07 and Pismis 23. The spectra were obtained at CASLEO (San Juan, Argentina) in the range 3600-6800 A. Two out of the 6 studied clusters (ESO065-SC07 and BH92) had not been the subject of previous studies so that the fundamental parameters determined in the current work turn out to be the .rst of their kind. For the remainig four clusters we provide independent information of that derived from colourmagnitude diagram studies. Using the equivalent widths of the Balmer lines and comparing the cluster spectra with solar-metallicity template spectra of Galactic star clusters with known properties, we derive both foreground E(B-V) colour excesses and ages for the whole sample. The age and reddening distributions of the present cluster sample match those of open clusters with known parameters in a 80° sector centered at l = 300°.