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Challenges of AGB modelling with dust

Published online by Cambridge University Press:  11 May 2017

Paolo Ventura ,
Flavia Dell’Agli ,
Marcella Di Criscienzo ,
D. A. García–Hernández ,
Letizia Stanghellini  and
Raffaella Schneider
Paolo Ventura
Affiliation:
INAF - Osservatorio Astronomico di Roma, 00077, Monte Porzio Catone (RM), Italy
Flavia Dell’Agli
Affiliation:
INAF - Osservatorio Astronomico di Roma, 00077, Monte Porzio Catone (RM), Italy Università di Roma ”La Sapienza”, Piazzale Aldo Moro 5, 00136, Roma, Italy
Marcella Di Criscienzo
Affiliation:
INAF - Osservatorio Astronomico di Roma, 00077, Monte Porzio Catone (RM), Italy
D. A. García–Hernández
Affiliation:
Instituto de Astrofísica de Canarias, E-38205 La Laguna, Tenerife, Spain Departamento de Astrofísica, Universidad de La Laguna (ULL), E-38206 La Laguna, Tenerife, Spain
Letizia Stanghellini
Affiliation:
National Optical Astronomy Observatory, 950 N. Cherry Avenue, Tucson (AZ) 85719, USA
Raffaella Schneider
Affiliation:
INAF - Osservatorio Astronomico di Roma, 00077, Monte Porzio Catone (RM), Italy
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Abstract

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We report on the most recent progresses on the modelling of the asymptotic giant branch (AGB) phase. We show that dust formation in the wind of AGBs is sensitive to the mass of the precursor, low–mass AGB with mass below ~ 3 M⊙ producing mainly carbonaceous dust, whereas their counterparts of higher mass produce silicates and alumina dust. We discuss the uncertainty of the results, due to the poor knowledge of physical mechanisms highly important for AGB evolution, primarily convection and mass loss. We show how the chemical composition of planetary nebulae can be used to draw information on the main features of AGB evolution.

Keywords

stars: AGB and post–AGBstars: evolutionplanetary nebulae: general
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 11 , General Assembly A29B , August 2015 , E3
Copyright
Copyright © International Astronomical Union 2017 

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