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We investigate the influence of magnetic fields upon the dynamics of andresulting gravitational waves from a binary neutron star merger in full generalrelativity coupled to ideal magnetohydrodynamics (MHD). We consider two mergerscenarios, one where the stars begin with initially aligned poloidal magneticfields and one with no magnetic field. Both mergers result in a stronglydifferentially rotating object. In comparison to the non-magnetized scenario,the aligned magnetic fields delay the final merger of the two stars. During andafter merger we observe phenomena driven by the magnetic field, includingKelvin-Helmholtz instabilities in shear layers, winding of the field lines, andtransition from poloidal to toroidal fields. These effects not only produceelectromagnetic radiation, but also can have a strong influence on thegravitational waves. Thus, there are promising prospects for studying suchsystems with both types of waves.

Magnetized Neutron Star Mergers and Gravitational Wave Signals