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AGB stars and the cosmic dust cycle

Published online by Cambridge University Press:  30 December 2019

Svitlana Zhukovska Open the ORCID record for Svitlana Zhukovska [Opens in a new window]
Svitlana Zhukovska*
Affiliation:
Max Planck Institute for Astrophysics Karl-Schwarzshild-Str. 1, 85748 Garching, Germany email: [email protected]
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Abstract

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Theoretical and observational studies of dust condensed in outflows of AGB stars have substantially advanced the understanding of dust mixture from individual stars. This detailed information incorporated in models of the lifecycle of interstellar grains provides a flexible tool to study the contribution of AGB stars to the galactic dust budget. The role of these stars in dust production depends on the morphological type and age of galaxy. While AGB stars are sub-dominant dust sources in evolved systems as the Milky Way, the observed relation between the dust-to-gas ratio and metallicity suggests that the dust input in young dwarf galaxies with 7≲12+log(O/H)≲8 can be dominated by the AGB stars. In application to post-starburst and early-type galaxies, the models for stardust evolution in combination with modern infrared observations give insights in the origin of their high dust content and its implications for their evolutionary scenarios.

Keywords

stars: AGB and post-AGBdustextinctiongalaxies: evolution
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. 258 - 264
Copyright
© International Astronomical Union 2019 

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