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2001PASP..113.1365B - Publ. Astron. Soc. Pac., 113, 1365-1377 (2001/November-0)
Lick spectral indices for super-metal-rich stars.
BUZZONI A., CHAVEZ M., MALAGNINI M.L. and MOROSSI C.
Abstract (from CDS):
By comparing models and observations, we find no evidence for nonstandard Mg versus Fe relative abundance, so [Mg/Fe]=0, on the average, for our sample. Both the Worthey et al. and Buzzoni et al. fitting functions are found to suitably match the data and can therefore confidently be extended for population synthesis application also to supersolar metallicity regimes. A somewhat different behavior of the two fitting sets appears, however, beyond the temperature constraints of our stellar sample. Its impact on the theoretical output is discussed, as far as the integrated Mg2 index is derived from synthesis models of stellar aggregates. A two-index plot, such as Mg2 versus Fe5270, is found to provide a simple and powerful tool for probing distinctive properties of single stars and stellar aggregates as a whole. The major advantage, over a classical CM diagram, is that it is both reddening free and distance independent.
Abstract Copyright: ∼
Journal keyword(s): Galaxy: Stellar Content - Stars: Abundances - Stars: Atmospheres - Stars: Fundamental Parameters
VizieR on-line data: <Available at CDS (J/PASP/113/1365): table1.dat>
Simbad objects: 139
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