| |
 |
| Paper: |
3D Hydrodynamical Simulations of Proton Ingestion |
| Volume: |
458, Galactic Archaeology: Near-Field Cosmology and the Formation of the Milky Way |
| Page: |
45 |
| Authors: |
Stancliffe, R. J.; Dearborn, D. S. P.; Lattanzio, J. C.; Heap, S. A.; Campbell, S. W. |
| Abstract: |
We use the 3D stellar structure code Djehuty to model the ingestion of protons in a low-mass, low-metallicity asymptotic giant branch star. We find significant differences between the predictions of our 1D stellar evolution code and the results of our hydrodynamic simulations. The hydrodynamic simulations show that protons are rapidly transported from the tail of the hydrogen burning shell by fast, downward flowing plumes and burning does not take place until the protons are in close proximity to the helium burning shell. We find hydrogen burning luminosities many orders of magnitude in excess of those in the 1D model, but there is no splitting of the convective region. We caution that 1D mixing length theory with diffusive mixing does not give an accurate representation of proton ingestion events. |
|
|
|
|
|
