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Evolution of the first stellar generations
R. Hirschi, A. Maeder, G. Meynet +2
Although the theoretical study of very low metallicity (Z) and metal-free stars is not new, their importance has recently greatly increased since two related fields have been devel…
The impact of stellar rotation on the CNO abundance patterns in the Milky Way at low metallicities
C. Chiappini, R. Hirschi, F. Matteucci +3
We investigate the effect of new stellar models, which take rotation into account, computed for very low metallicities on the chemical evolution of the earliest phases of the Milky…
Deuterium astration in the local disc and beyond
Donatella Romano, Monica Tosi, Cristina Chiappini +1
(Abridged) Estimates of the interstellar deuterium abundance span a wide range of values. Here we study the evolution of deuterium in the framework of successful models for the che…
A strong case for fast stellar rotation at very low metallicities
C. Chiappini, R. Hirschi, G. Meynet +3
We investigate the effect of new stellar models, which take rotation into account, computed for a metallicity Z = 10^{-8} on the chemical evolution of the earliest phases of the Mi…
Metallicity Gradient And The Hybrid Formation Scenario For Early-Type Galaxies
Ricardo L. C. Ogando, Marcio A. G. Maia, Cristina Chiappini +3
We present radial gradients of the Lick index Mg2 for 40 early-type galaxies. In plots of Grad(Mg2) versus mass indicators, such as log(sigma), the lower boundary of the points dis…