General relativistic magnetohydrodynamic simulations with bam: Implementation and code comparison
Binary neutron star mergers are among the most energetic events in our Universe, with magnetic fields significantly impacting their dynamics, particularly after the merger. While numerical-relativity simulations that correctly describe the physics are essential to model their rich phenomenology, the inclusion of magnetic fields is crucial for realistic simulations. For this reason, we have extended the bam code to enable general relativistic magnetohydrodynamic (GRMHD) simulations employing a hyperbolic ``divergence cleaning'' scheme. We present a large set of standard GRMHD tests and compare the bam code to other GRMHD codes, spritz, gram-x, and ${\mathrm{SACRA}}_{\mathrm{KK}22}$, which employ different schemes for the evolution of the magnetic fields. Overall, we find that the bam code shows good performance in simple special-relativistic tests. In addition, we find good agreement and consistent results when comparing GRMHD simulation results between bam and ${\mathrm{SACRA}}_{\mathrm{KK}22}$.
Authors
- Philipp Mösta
- Masaru Shibata (ORCID: https://orcid.org/0000-0002-4979-5671)
- Federico Schianchi (ORCID: https://orcid.org/0000-0001-7646-5988)
- Anna Neuweiler (ORCID: https://orcid.org/0000-0003-3205-8373)
- Bruno Giacomazzo (ORCID: https://orcid.org/0000-0002-6947-4023)
- Tim Dietrich (ORCID: https://orcid.org/0000-0003-2374-307X)
- Bernd Brügmann
- Swapnil Shankar (ORCID: https://orcid.org/0000-0002-5109-0929)
- Kenta Kiuchi (ORCID: https://orcid.org/0000-0003-4988-1438)
- Edoardo Giangrandi (ORCID: https://orcid.org/0000-0001-9545-466X)
Institutions
- University of Potsdam (DE)
- Kyoto University (JP)
- Brera Astronomical Observatory (IT)
- Instituto de Física Teórica (ES)
- Max Planck Institute for Gravitational Physics (DE)
- Istituto Nazionale di Fisica Nucleare, Sezione di Milano Bicocca (IT)
- Yukawa Institute for Theoretical Physics (JP)
- University of Milano-Bicocca (IT)
- University of Coimbra (PT)
- University of Amsterdam (NL)
Publication Details
- Journal
- Physical review. D/Physical review. D.
- Published
- 2024-10-18
- DOI
- https://doi.org/10.1103/physrevd.110.084046
- Citations
- 9
- Primary Topic
- Pulsars and Gravitational Waves Research
- Type
- article
- Field-Weighted Citation Impact
- 2.98
Funders
- Deutsche Forschungsgemeinschaft
- Ministry of Education, Culture, Sports, Science and Technology
- European Research Council
- Japan Society for the Promotion of Science
- Fundação para a Ciência e a Tecnologia
- Leibniz-Rechenzentrum