INVESTIGADORES
AHUMADA Andrea Veronica
artículos
Título:
Reddening and age for 13 southern Galactic open clusters determined from integrated spectra
Autor/es:
AHUMADA, A. V.; CLARIÁ, J. J.; BICA, E.; DUTRA, C. M.; TORRES, M. C.
Revista:
ASTRONOMY AND ASTROPHYSICS
Editorial:
EDP SCIENCES S A
Referencias:
Lugar: Paris; Año: 2001 vol. 377 p. 845 - 853
ISSN:
0004-6361
Resumen:
In this study we present flux-calibrated integrated spectra in the range
3800-6800 Å for 13 concentrated open clusters with Galactic
longitudes between 219deg and 316deg, nine of
which have not been previously studied. Using the equivalent widths of
the Balmer lines and comparing the cluster spectra with template spectra
of Magellanic Clouds and Galactic star clusters with known parameters,
we derive both foreground interstellar reddening values and age. For
nine clusters these two parameters have been determined for the first
time, while for the rest of the sample the results show good agreement
with previous studies. The present analysis indicates four very young
(Hogg 11, NGC 5606, vdB-RN 80 and Pismis 17), seven moderately young
(ESO 429-SC13, Hogg 3, Hogg 12, Haffner 7, BH 87, NGC 2368 and Bochum
12) and two intermediate-age (Berkeley 75 and NGC 2635) open clusters.
The derived foreground interstellar reddening values are in the range
0.00 <= E(B-V) <= 0.38. The age and reddening distributions of the
present sample of relatively faint open clusters match those of open
clusters with known parameters in a 90deg sector centered at
l = 270deg