87 citations · 155 across the 4 of their papers we have counts for
4 papers
Semi-empirical versus Theoretical Stellar Population Models: a comparison with Star Clusters
Randa Asad, Paula R. T. Coelho, Johina M. John +3
Stellar population synthesis (SPS) models are a key tool for deriving the age, metallicity, radial velocity and reddening of star clusters from their integrated spectra. Using a sa…
Self-similarity in the chemical evolution of galaxies and the delay time distribution of SNe Ia
C. J. Walcher, R. M. Yates, I. Minchev +7
Recent improvements in the age dating of stellar populations and single stars allow us to study the ages and abundance of stars and galaxies with unprecedented accuracy. We here co…
Abundance patterns in early-type galaxies: is there a 'knee' in the [Fe/H] vs. [alpha/Fe] relation?
C. J. Walcher, P. R. T. Coelho, A. Gallazzi +3
Early-type galaxies (ETGs) are known to be enhanced in alpha elements, in accordance with their old ages and short formation timescales. In this contribution we aim to resolve the…
Differential stellar population models: how to reliably measure [Fe/H] and [alpha/Fe] in galaxies
C. J. Walcher, P. Coelho, A. Gallazzi +1
We present differential stellar population models, which allow improved determinations of the ages, iron and alpha-element abundances of old stellar populations from spectral fitti…