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Envelope Overshooting in Low Metallicity Intermediate- and High-mass Stars: a test with the Sagittarius Dwarf Irregular Galaxy
Jing Tang, Alessandro Bressan, Alessandra Slemer +5
We check the performance of the {\sl\,PARSEC} tracks in reproducing the blue loops of intermediate age and young stellar populations at very low metallicity. We compute new evoluti…
Connecting the evolution of thermally pulsing asymptotic giant branch stars to the chemistry in their circumstellar envelopes -- I. The case of hydrogen cyanide
Paola Marigo, Emanuele Ripamonti, Ambra Nanni +2
We investigate the formation of hydrogen cyanide (HCN) in the inner circumstellar envelopes of thermally pulsing asymptotic giant branch (TP-AGB) stars. A dynamic model for periodi…
Uncertainties on near-core mixing in red-clump stars: effects on the period spacing and on the luminosity of the AGB bump
Diego Bossini, Andrea Miglio, Maurizio Salaris +7
Low-mass stars in the He-core-burning phase (HeCB) play a major role in stellar, galactic, and extragalactic astrophysics. The ability to predict accurately the properties of these…
Lithium evolution in metal-poor stars: from Pre-Main Sequence to the Spite plateau
Xiaoting Fu, Alessandro Bressan, Paolo Molaro +1
Lithium abundance derived in metal-poor main sequence stars is about three times lower than the value of primordial Li predicted by the standard Big Bang nucleosynthesis when the b…
PARSEC evolutionary tracks of massive stars up to at metallicities 0.00010.04
Yang Chen, Alessandro Bressan, Léo Girardi +3
We complement the PARSEC data base of stellar evolutionary tracks with new models of massive stars, from the pre-main sequence phase to the central carbon ignition. We consider a b…
On the Interpretation of Sub-Giant Branch Morphologies of Intermediate-Age Star Clusters with Extended Main Sequence Turnoffs
Paul Goudfrooij, Leo Girardi, Philip Rosenfield +4
Recent high-quality photometry of many star clusters in the Magellanic Clouds with ages of 12 Gyr revealed main sequence turnoffs (MSTOs) that are significantly wider than c…