Spectroscopic Ages and Metallicities of Galaxies

M. Koleva, A.G. Bedregal, Ph. Prugniel, S. De Rijcke, W.W. Zeilinger
2011 EAS Publications Series  
Dwarf galaxies are generally faint. To derive their age and metallicity distributions, it is critical to optimize the use of any collected photon. Koleva et al., using full spectrum fitting, have found strong population gradients in some dwarf elliptical galaxies. Here, we show that the population profiles derived with this method are consistent and more precise than those obtained with spectrophotometric indices. This allows studying fainter objects in less telescope time.
doi:10.1051/eas/1148020 fatcat:h27vwk6xozd33isab5c7mxpjku