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Calibrating TP-AGB stellar models and chemical yields through resolved stellar populations in the Small Magellanic Cloud

Published online by Cambridge University Press:  30 December 2019

Giada Pastorelli Open the ORCID record for Giada Pastorelli [Opens in a new window] ,
Paola Marigo ,
Léo Girardi  and
the STARKEY project team
Giada Pastorelli
Affiliation:
Dipartimento di Fisica e Astronomia Galileo Galilei, Università di Padova, Vicolo dell’Osservatorio 3, 35122 Padova, Italy – email: giada.pastorelli@studenti.unipd.it
Paola Marigo
Affiliation:
Dipartimento di Fisica e Astronomia Galileo Galilei, Università di Padova, Vicolo dell’Osservatorio 3, 35122 Padova, Italy – email: giada.pastorelli@studenti.unipd.it
Léo Girardi
Affiliation:
Dipartimento di Fisica e Astronomia Galileo Galilei, Università di Padova, Vicolo dell’Osservatorio 3, 35122 Padova, Italy – email: giada.pastorelli@studenti.unipd.it Osservatorio Astronomico di Padova – INAF, Vicolo dell’Osservatorio 5, 35122 Padova, Italy
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Abstract

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Most of the physical processes driving the TP-AGB evolution are not yet fully understood and they need to be modelled with parameterised descriptions. We present the results of the on-going calibration of the TP-AGB phase based on a complete sample of AGB stars in the Small Magellanic Cloud (SAGE-SMC survey). We computed large grids of TP-AGB models with several combinations of third dredge-up and mass-loss prescriptions with the COLIBRI code. The SMC AGB population is modelled with the population synthesis code TRILEGAL according to the space-resolved star formation history derived with the deep photometry from the VISTA survey of the Magellanic Clouds. We put quantitative constraints on the efficiencies of the third dredge-up and mass loss by requiring the models to reproduce the star counts and the luminosity functions of the observed Oxygen-, Carbon-rich and extreme-AGB stars and we investigate the impact of the best-fitting prescriptions on the chemical yields.

Keywords

stars: AGB and post-AGBstars: mass lossgalaxies: Magellanic Clouds
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 14 , Symposium S343: Why Galaxies Care About AGB Stars: A Continuing Challenge through Cosmic Time , August 2018 , pp. 269 - 272
Copyright
© International Astronomical Union 2019 

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