PION: Simulations of Wind-Blown Nebulae
Abstract
We present an overview of PION, an open-source software project for solving radiation-magnetohydrodynamics equations on a nested grid, aimed at modelling asymmetric nebulae around massive stars. A new implementation of hybrid OpenMP/MPI parallel algorithms is briefly introduced, and improved scaling is demonstrated compared with the current release version. Three-dimensional simulations of an expanding nebula around a Wolf-Rayet star are then presented and analysed, similar to previous 2D simulations in the literature. The evolution of the emission measure of the gas and the X-ray surface brightness are calculated as a function of time, and some qualitative comparison with observations is made.
- Publication:
-
The Predictive Power of Computational Astrophysics as a Discover Tool
- Pub Date:
- January 2023
- DOI:
- 10.1017/S1743921322001399
- arXiv:
- arXiv:2203.04693
- Bibcode:
- 2023IAUS..362..262M
- Keywords:
-
- (magnetohydrodynamics:) MHD shock waves;
- methods: numerical;
- stars: mass loss;
- stars: Wolf-Rayet;
- ISM: bubbles;
- Astrophysics - Astrophysics of Galaxies
- E-Print:
- 6 pages, 3 figures, conference proceedings, IAUS362: The predictive power of computational astrophysics as discovery tool (D. Bisikalo, T. Hanawa, C. Boily, J. Stone, eds.)