Disentangling age and metallicity in distant unresolved stellar systems
M. Cantiello, E. Brocato, G.Raimondo
TL;DR
This paper explores how Surface Brightness Fluctuations (SBF) can be used to determine the age and metallicity of unresolved stellar systems, providing a tool for understanding distant galaxies.
Contribution
It demonstrates that SBF measurements, combined with other indicators, can effectively constrain stellar population properties in distant unresolved systems.
Findings
SBF magnitudes are reliable tracers of stellar populations.
SBF data can help estimate metallicity and age of stellar components.
SBF techniques serve as both distance indicators and population diagnostics.
Abstract
We present some results of an observational and theoretical study on unresolved stellar systems based on the Surface Brightness Fluctuations (SBF) technique. It is shown that SBF magnitudes are a valuable tracer of stellar population properties, and a reliable distance indicator. SBF magnitudes, SBF-colors, and SBF-gradients can help to constrain within relatively narrow limits the metallicity and age of the dominant stellar component in distant stellar systems, especially if coupled with other spectro-photometric indicators.
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