Magnetic field effects in binary neutron star mergers: insights from GRMHD simulations

          @misc{ pirsa_PIRSA:25030142,
            doi = {10.48660/25030142},
            url = {https://pirsa.org/25030142},
            author = {Gutierrez, Eduardo},
            keywords = {Strong Gravity},
            language = {en},
            title = {Magnetic field effects in binary neutron star mergers: insights from GRMHD simulations},
            publisher = {Perimeter Institute},
            year = {2025},
            month = {mar},
            note = {PIRSA:25030142 see, \url{https://pirsa.org}}
          }
          

Abstract

Magnetic fields play a key role in shaping the dynamics and observational phenomenology of binary neutron star (BNS) mergers. In this talk, I will present results from general relativistic magnetohydrodynamic (GRMHD) simulations performed with the code GR-Athena++, exploring how different initial magnetic field configurations affect the evolution of BNS mergers. We investigated magnetic field amplification, primarily driven by the Kelvin-Helmholtz instability, the post-merger remnant and disk structure, and the characteristics of the ejected material. I will discuss how these processes impact potential electromagnetic counterparts and their detectability. Finally, I will highlight recent advancements in our numerical methods that improve the modeling of magnetized neutron star mergers, paving the way for more accurate predictions of multimessenger signals from these extreme events.