Speaker
Description
Magnetorotational (MR) core-collapse supernovae are driven by rapid rotation and strong magnetic fields and may lead to energetic explosions. Understanding the multidimensional fluid dynamics of these events is essential for predicting their observational signatures and nucleosynthetic implications. To this end, we perform three-dimensional general relativistic magnetohydrodynamic (GRMHD) simulations of rotating, magnetized progenitors with spectral neutrino transport.
In models with sufficiently rapid rotation and strong magnetic fields, our simulations produce MHD jets and characteristic gravitational-wave (GW) signals. In particular, we find low-frequency GW emission associated with neutrino memory, together with strong circular polarization arising from non-axisymmetric instabilities in the vicinity of the proto-neutron star.
The same multidimensional dynamics that drive MR explosions, including rapid shock expansion and the formation of collimated outflows, can also shape the thermodynamic histories of the ejecta that are relevant to heavy-element production. Tracer-particle trajectories extracted from our 3D GRMHD simulations allow us to characterize these nucleosynthesis-relevant conditions.
In this presentation, we will focus primarily on the explosion dynamics and GW characteristics of our MR supernova models. We will also briefly discuss the implications of the simulated ejecta dynamics for the conditions of element production.
| Category | Theory |
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