Author

E. Most

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Preprint Nov 2026

Numerical-Relativity Particle-in-Cell Simulations: Self-Gravitating Collisionless Matter in Dynamical Spacetimes

Gravitational collapse and instability, black-hole dynamics in systems with large scale separations, and questions surrounding extremal black hole formation require full nonlinear studies using accurate and adapted numerical tools. To this end, we present a new algorithm to study collisionless relativistic systems usin...

Jia-Xi Wu, E. Most · 0 citations

Preprint Oct 2026

Three-flavor neutrino Boltzmann transport and flavor instabilities in long-lived neutron-star merger remnants

Binary neutron-star (BNS) mergers are multimessenger sources whose kilonova emission and nucleosynthesis depend sensitively on neutrino microphysics and flavor conversion. Most BNS merger simulations assume $\mu$-$\tau$ neutrino degeneracy in a two-flavor treatment. We investigate the fast flavor instability (FFI) and...

H. Ng, Jia-Bao Liu, A. Offermans et al. · 0 citations

Preprint Sep 2026

Nonlinearly Causal General-Relativistic Two-Fluid Dissipative Magnetohydrodynamics

We present a formulation of general-relativistic (GR) 19-moment dissipative magnetohydrodynamics (MHD), capable of handling all first-order dissipative terms (viscosity, heat conductivity, resistivity and Hall terms), as well as all ideal electron degrees of freedom (number density, momentum and energy) in a GR astroph...

E. Most, Samuel J. Dunham · 1 citation