Evolutionary Synthesis Of Simple Stellar Populations

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  • 17 March 1998
Abstract
We are using the evolutionary tracks from the Padova group (1993, 1994), theoretical colour calibrations from Lejeune et al. 1997 and fit functions for stellar atmospheric indices from Worthey et al. 1994 in our evolutionary synthesis models for simple stellar populations. A Monte-Carlo technique allows us to obtain a smooth time evolution of broad band colours in UBVRIK and of a series of stellar absorption features for Single Burst Stellar Populations (SSPs). We present colours and indices for SSPs with ages from 1 Gyrs to 16 Gyrs and with metallicities [M/H] = -2.3, -1.7, -0.7, -0.4, 0.0 and 0.4. Model colours and indices at an age of about a Hubble time are in good agreement with observed colours and indices of the Galactic and M31 GCs.

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