Astronomy and Astrophysics – Astrophysics
Scientific paper
1998-03-17
Astronomy and Astrophysics
Astrophysics
12 pages, 12 figures, LaTeX2e, uses A&A class, graphicx. Now accepted by A&A. Model files are available at http://www.uni-sw
Scientific paper
10.1051/aas:1999499
We construct evolutionary synthesis models for simple stellar populations using the evolutionary tracks from the Padova group (1993, 1994), theoretical colour calibrations from Lejeune et al., and fit functions for stellar atmospheric indices from Worthey et al.. A Monte-Carlo technique allows us to obtain a smooth time evolution of both broad band colours in UBVRIK and a series of stellar absorption features for Single Burst Stellar Populations ({\bf SSPs}). We present colours and indices for SSPs with ages from $1 \cdot 10^9$ yrs to $1.6 \cdot 10^{10}$ yrs and 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 M 31 GCs.
Alvensleben Uta Fritze- v.
Fricke Klaus J.
Kurth O. M.
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