Indicators of star formation: 4000 Angstrom break and Balmer lines
B. M. Poggianti, G. Barbaro
Abstract
The behaviour of the 4000 Angstrom break index and of the equivalent width of the main Balmer lines is investigated a) for a single star as a function of effective temperature, gravity and metallicity and b) for a single stellar population as a function of age and metallicity. Consequences for the interpretation of integrated spectra are presented.
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