3 papers
astro-ph2002
The Epochs of Early-Type Galaxy Formation in Clusters and in the Field
Daniel Thomas, Claudia Maraston, Ralf Bender
We compute new population synthesis models of Lick absorption line indices with variable alpha/Fe ratios and use them to derive average ages, metallicities, and alpha/Fe element en…
astro-ph1999
Stellar yields and chemical evolution - The solar neighborhood as a calibrator
Daniel Thomas, Laura Greggio, Ralf Bender
Uncertainties in stellar nucleosynthesis and their impact on models of chemical evolution are discussed. Comparing the Type II supernova nucleosynthesis prescriptions from Woosley…
astro-ph1999
Probing Star Formation Timescales in Elliptical Galaxies
Daniel Thomas, Guinevere Kauffmann
In models of galaxy formation in a hierarchical Universe, elliptical galaxies form through the merging of smaller disk systems. These models yield a number of testable predictions…