INVESTIGADORES
AHUMADA Andrea Veronica
artículos
Título:
An Investigation of the Use of Synthetic Spectra to Find the Ages of Stellar Clusters
Autor/es:
ASA''D, RANDA S.; HANSON, M. M.; AHUMADA, ANDREA V.
Revista:
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC
Editorial:
UNIV CHICAGO PRESS
Referencias:
Lugar: Chicago; Año: 2013 vol. 125 p. 1304 - 1314
ISSN:
0004-6280
Resumen:
The utility of stellar cluster aging methods based on integrated spectra
is clearly demonstrated by its extensive use by researchers for decades.
However, few studies have determined the accuracy of such methods using
a significant sample of age-calibrated stellar clusters with recent
models. We have amassed a sample of 27 stellar clusters, 20 with new
spectra we obtained with the SOAR and Blanco 4-m Telescopes, with
previously determined ages using color-magnitude diagrams (CMDs). We
compared the CMD ages to ages obtained from the clusters'' integrated
spectra. We find that the integrated spectra in the wavelength range
3626--6230 \AA, when compared with high resolution computational
models, provide very good age predictions. In particular, the spectral
method is more robust in resolving the age-extinction degeneracy that
plagues broad-band photometric aging methods. We observe no significant
difference in the ability of the synthetic spectra to fit and properly
age stellar clusters based on the intrinsic mass of the stellar clusters
in our sample.