Synthetic spectra for single-aged populations: TiO bands.

Details Synthetic spectra for single-aged populations: TiO bands. Synthetic spectra for single-aged populations: TiO bands.

Nov 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995a%26as..113..547m&link_type=abstract

Astronomy and Astrophysics Supplement, v.113, p.547

Astronomy and Astrophysics

Astrophysics

6

Globular Clusters, Stars: Abundances, Late-Type, Evolution

Scientific paper

Synthetic spectra of single-aged old stellar populations of metallicities in the range -1.0<=[Fe/H]<=+0.3 are computed in the spectral region 6950-7550A containing TiO bands, by combining synthetic spectra of individual stars. The moderately metal-poor composite spectra are based on isochrones for all evolutionary sequences, whereas the metal-rich ones are based on isochrones for the main sequence and on observed colour-magnitude diagrams for the evolved stages. The composite synthetic spectra are compared to integrated spectra of Galactic globular clusters and good agreement is found. From the resulting single-aged grid we derive relations between equivalent width W(TiO) versus metallicity and [α-elements/Fe].

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