General relativistic force-free electrodynamics with a discontinuous Galerkin-finite difference hybrid method
Fuente:
arXiv
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2024
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866909222887751680 |
|---|---|
| author | Kim, Yoonsoo Most, Elias R. Throwe, William Teukolsky, Saul A. Deppe, Nils |
| author_facet | Kim, Yoonsoo Most, Elias R. Throwe, William Teukolsky, Saul A. Deppe, Nils |
| contents | Relativistic plasmas around compact objects can sometimes be approximated as being force-free. In this limit, the plasma inertia is negligible and the overall dynamics is governed by global electric currents. We present a novel numerical approach for simulating such force-free plasmas, which allows for high accuracy in smooth regions as well as capturing dissipation in current sheets. Using a high-order accurate discontinuous Galerkin method augmented with a conservative finite-difference method, we demonstrate efficient global simulations of black hole and neutron star magnetospheres. In addition to a series of challenging test problems, we show that our approach can-depending on the physical properties of the system and the numerical implementation-be up to 10x more efficient than conventional simulations, with a speedup of 2-3x for most problems we consider in practice. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2404_01531 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | General relativistic force-free electrodynamics with a discontinuous Galerkin-finite difference hybrid method Kim, Yoonsoo Most, Elias R. Throwe, William Teukolsky, Saul A. Deppe, Nils Instrumentation and Methods for Astrophysics High Energy Astrophysical Phenomena General Relativity and Quantum Cosmology Plasma Physics Relativistic plasmas around compact objects can sometimes be approximated as being force-free. In this limit, the plasma inertia is negligible and the overall dynamics is governed by global electric currents. We present a novel numerical approach for simulating such force-free plasmas, which allows for high accuracy in smooth regions as well as capturing dissipation in current sheets. Using a high-order accurate discontinuous Galerkin method augmented with a conservative finite-difference method, we demonstrate efficient global simulations of black hole and neutron star magnetospheres. In addition to a series of challenging test problems, we show that our approach can-depending on the physical properties of the system and the numerical implementation-be up to 10x more efficient than conventional simulations, with a speedup of 2-3x for most problems we consider in practice. |
| title | General relativistic force-free electrodynamics with a discontinuous Galerkin-finite difference hybrid method |
| topic | Instrumentation and Methods for Astrophysics High Energy Astrophysical Phenomena General Relativity and Quantum Cosmology Plasma Physics |
| url | https://arxiv.org/abs/2404.01531 |