A model of population synthesis and the color evolution of galaxies.

Details A model of population synthesis and the color evolution of galaxies. A model of population synthesis and the color evolution of galaxies.

Apr 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997acaps..17..135x&link_type=abstract

Acta Astrophys. Sin., Vol. 17, No. 2, p. 135 - 145

Astronomy and Astrophysics

Astrophysics

Galaxies: Population Synthesis, Galaxies: Evolution, Galaxies: Multicolor Photometry

Scientific paper

The authors construct a model of population synthesis using the new stellar isochrones calculated by Bertelli et al. and the observed stellar spectrum from 3130 Å by Gunn and Stryker. The model can predict the spectral energy distribution (SED) of a Simple Stellar Population (SSP) from an age of 107 to 2×1010yr with metallicities from Z = 0.0004 to Z = 0.05, covering the whole optical range. The SED of galaxies at different ages can be derived as a convolution of SSP with corresponding star formation rate at different times. The authors calculate the standard UBVRI colors as well as 15 medium-band BATC colors for the synthesized SSPs and galaxies. The predicted UBVRI colors of galaxies from E/S0 to Sdm at the age of 12 Gyr are in good agreement with the current observations.

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