10.5281/zenodo.4563250
https://zenodo.org/records/4563250
oai:zenodo.org:4563250
Pratt, Jane
Jane
Pratt
0000-0003-2707-3616
Georgia State University
Baraffe, Isabelle
Isabelle
Baraffe
0000-0001-8365-5982
University of Exeter
Dethero, Mary Geer
Mary Geer
Dethero
0000-0003-1617-3697
Georgia State University
Deep mixing due to convective penetration during the red giant branch luminosity bump
Zenodo
2021
Stellar Hydrodynamics
Red Giant Branch Luminosity Bump
Convection
Convective Overshooting
Stellar Evolution
2021-02-26
eng
Poster
10.5281/zenodo.4563249
https://zenodo.org/communities/coolstars20half
Creative Commons Attribution 4.0 International
To interpret the wide variation in observed chemical abundances during the red giant phase of evolution, it is necessary to develop theoretical and computational modeling of convection under realistic stellar conditions. In this contribution we quantify mixing due to convective penetration in the deep stellar interior through global hydrodynamic simulations. We produce the evolutionary track of a 3 solar mass red giant using the 1D stellar evolution code MESA. We select models from this evolutionary track at different points in time, beginning at the first dredge-up and spanning the brief period of time of the red giant luminosity bump. The realistic stratification in density, temperature, and luminosity of these models is then used to produce global simulations of the stellar interior with the multi-dimensional, time implicit, fully compressible, hydrodynamic, implicit large eddy simulation code MUSIC. We compare the changing amount of mixing using a sophisticated enhanced diffusion model for convective penetration (Pratt et al 2017), targeted for one dimensional stellar evolution calculations.