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| Paper: |
Does Simultaneous Solution Matter for Stellar Evolution Codes? |
| Volume: |
378, Why Galaxies Care About AGB Stars: Their Importance as Actors and Probes |
| Page: |
135 |
| Authors: |
Stancliffe, R.J. |
| Abstract: |
A version of the STARS stellar evolution code has been developed that uses a non-simultaneous solution of the equations of stellar structure and evolution. It is therefore possible to test the dependence of the solution on how the equations are solved. Three models of metallicity Z=0.02 are investigated. Prior to the asymptotic giant branch, the models are almost identical. However once thermal pulses start, the two methods of solution yield diverging results with the non-simultaneous technique predicting longer interpulse periods. This is traced to difficulties associated with hydrogen burning caused by the use of a moving mesh. It is shown that, with careful control of the temporal resolution, the results of the simultaneous technique can be recovered. |
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