Stellar Evolutionary Models for Magellanic Clouds

Astrophysics, abstract
astro-ph/0304213

From: Pier Giorio Prada Moroni <prada@df.unipi.it>

Date: Fri, 11 Apr 2003 09:06:22 GMT   (279kb)

Authors:
V. Castellani,
S. Degl’Innocenti,
M. Marconi,
P.G. Prada Moroni,
P. Sestito

Comments: 11 pages, 9 eps figures, A&A accepted, evolutionary tracks and
isochrones available at this http URL at the link “Pisa Evolutionary
Library”

Report-no: UNIPI-58-03

We supplement current evolutionary computations concerning Magellanic Cloud
stars by exploring the evolutionary behavior of canonical stellar models
(i.e.,with inefficient core overshooting) with metallicities suitable for stars
in the Clouds. After discussing the adequacy of the adopted evolutionary
scenario, we present evolutionary sequences as computed following a selected
sample of stellar models in the mass range 0.8-8 Mo from the Main Sequence till
the C ignition or the onset of thermal pulses in the advanced Asymptotic Giant
Branch phase. On this basis, cluster isochrones covering the range of ages from
100 Myr to 15 Gyr are presented and discussed. To allow a comparison with
evolutionary investigations appeared in the recent literature, we computed
additional sets of models which take into account moderate core overshooting
during the H burning phase, discussing the comparison in terms of current
uncertainties in the stellar evolutionary models. Selected predictions
constraining the cluster ages are finally discussed, presenting a calibration
of the difference in magnitude between the luminous MS termination and the He
burning giants in terms of cluster age. Both evolutionary tracks and isochrones
have been made available at the node this http URL as a first step of a
planned “Pisa Evolutionary Library”.

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