Relative Importance of Convective Uncertainties

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

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.

Citation

Kaiser, E. A., Hirschi, R., Arnett, W. D., Cristini, A., Georgy, C., & Scott, L. J. A. (2019). Relative Importance of Convective Uncertainties. . https://doi.org/10.1007/978-3-030-13876-9_71

• Conference Name: Nuclei in the Cosmos XV
• Conference Location: Rome, Italy
• Start Date: Jun 24, 2018
• End Date: Jun 29, 2018
• Online Publication Date: Aug 20, 2019
• Publication Date: 2019
• Deposit Date: Jun 16, 2023
• Pages: 385-387
• Series Title: Springer Proceedings in Physics
• Series ISSN: 0930-8989
• Edition: SPPHY, volume 219
• ISBN: 9783030138752; 9783030138769
• DOI: https://doi.org/10.1007/978-3-030-13876-9_71
• Additional Information: First Online: 20 August 2019