Stellar populations in medium redshift clusters. I - A set of model spectra based on Vandenberg's isochrones

Details Stellar populations in medium redshift clusters. I - A set of model spectra based on Vandenberg's isochrones Stellar populations in medium redshift clusters. I - A set of model spectra based on Vandenberg's isochrones

Sep 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26as...84..421p&link_type=abstract

Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 84, no. 3, Sept. 1990, p. 421-453.

Astronomy and Astrophysics

Astrophysics

18

Astronomical Catalogs, Main Sequence Stars, Red Shift, Star Clusters, Stellar Spectra, Subgiant Stars, Asymptotic Giant Branch Stars, Horizontal Branch Stars, Metallic Stars, Red Giant Stars

Scientific paper

A set of model isochrone spectra formed by combining stellar spectra in the proportions appropriate to the isochrone tabulations of VandenBerg, together with a Miller-Scalo mass function is presented. The model spectra cover the wavelength range 3000-10,000 A and have been constructed for metallicities in the range Fe/H from -1.0 to 0.5, and for isochrone ages of 2 to 15 billion years. The model spectra follow the isochrone tabulations by including contributions from stars along the main sequence and subgiant branch to the base of the giant branch, fully constraining the main sequence turnoff and early post main sequence evolutionary phases. They are useful for deconvolving the competing effects of age and metallicity dispersion in composite systems. Other important components such as Horizontal branch, red giant and asymptotic branch stars are not included explicitly because they are not yet tabulated by VandenBerg, and because their fractional contributions to a composite population are less certain. These components should be added as extra parameters from a stellar library when fitting real composite spectra.

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