Relative Importance of Convective Uncertainties

Etienne A. Kaiser, Raphael Hirschi, W. David Arnett, Andrea Cristini, Cyril Georgy, Laura J.A. Scott

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Convection plays a key role in the evolution of stars due to energy transport and mixing of composition. Despite its importance, this process is still not well understood. One longstanding conundrum in all 1D stellar evolution codes is the treatment of convective boundaries. In this study we compare two convective uncertainties, the boundary location (Ledoux versus Schwarzschild) and the amount of extra mixing, and their impact on the early evolution of massive stars. With increasing convective boundary mixing (CBM), we find a convergence of the two different boundary locations, a decreasing blue to red super giant ratio and a reduced importance of semiconvection.

Original languageEnglish (US)
Title of host publicationNuclei in the Cosmos XV
EditorsAlba Formicola, Matthias Junker, Lucio Gialanella, Gianluca Imbriani
PublisherSpringer Science and Business Media, LLC
Pages385-387
Number of pages3
ISBN (Print)9783030138752
DOIs
StatePublished - 2019
Event15th International Symposium on Nuclei in the Cosmos, NIC 2018 - L'Aquila, Italy
Duration: Jun 24 2018Jun 29 2018

Publication series

NameSpringer Proceedings in Physics
Volume219
ISSN (Print)0930-8989
ISSN (Electronic)1867-4941

Conference

Conference15th International Symposium on Nuclei in the Cosmos, NIC 2018
CountryItaly
CityL'Aquila
Period6/24/186/29/18

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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