Construct a realistic stellar model with polytropic relation
Solar and Stellar Astrophysics
2022-09-21 v1 Earth and Planetary Astrophysics
Abstract
The aim of this study is to construct a simple stellar model with non-uniform polytropic index. We find that the Emden equation cannot deal with the polytrope gas sphere with non-uniform polytropic index in a real star, and then we construct a realistic stellar model. The key point is that we should solve the two independent equations for density and pressure due to the essence of polytropic relation, but not the Emden equation which combines the hydrostatic balance and polytropic relation. We take the Sun for a computational example to find that this simple model yields quite a good result compared to the MESA code. The advantage of this simple model lies in its much simpler equation of state than that in the standard stellar model.
Keywords
Cite
@article{arxiv.2209.09417,
title = {Construct a realistic stellar model with polytropic relation},
author = {Xing Wei},
journal= {arXiv preprint arXiv:2209.09417},
year = {2022}
}