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Evolution of AGB stars at varying surface C/O ratio: The crucial effect of molecular opacities
P. Marigo
This study calls attention to the importance of properly coupling the molecular opacities to the actual surface abundances of TP-AGB stars that experience the third dredge-up and/o…
Zero-metallicity stars II. Evolution of very massive objects with mass loss
P. Marigo, C. Chiosi, R. -P. Kudritzki
We present evolutionary models of zero-metallicity very massive objects, with initial masses in the range 120 Msun -- 1000 Msun, covering their quiescent evolution up to central ca…
Evolution of zero-metallicity massive stars
P. Marigo, C. Chiosi, L. Girardi +1
We discuss the evolutionary properties of primordial massive and very massive stars, supposed to have formed from metal-free gas. Stellar models are presented over a large range of…
The intermediate-age open cluster NGC 2112
Giovanni Carraro, Roberto Barbon, Carla S. Boschetti
We report on CCD photometry of a field centered on the region of the intermediate-age open cluster NGC 2112 down to V=21. Due to the smaller field coverage, we are able to li…
Theoretical isochrones in several photometric systems I. Johnson-Cousins-Glass, HST/WFPC2, HST/NICMOS, Washington, and ESO Imaging Survey filter sets
L. Girardi, G. Bertelli, A. Bressan +5
We provide tables of theoretical isochrones in several photometric systems. To this aim, the following steps are followed: (1) First, we re-write the formalism for converting synth…
Asymptotic Giant Branch evolution at varying surface C/O ratio: effects of changes in molecular opacities
Paola Marigo
We investigate the effects of molecular opacities on the evolution of TP-AGB stars that experience the third dredge-up, i.e. with surface abundances of carbon and oxygen varying wi…