Bridging hybrid- and full-kinetic models with Landau-fluid electrons

Magnetic reconnection (MR) plays a fundamental role in plasma dynamics under many different conditions, from space and astrophysical environments to laboratory devices. High-resolution in-situ measurements missions allow study naturally occurring MR processes great detail. Alongside direct measurements, numerical simulations play key investigating the physics underlying MR. The choice of an adequate model be employed simulations, while also compromising with their computational cost, is crucial efficiently address problem. We consider new that includes refined electron response within hybrid-kinetic framework (kinetic ions, fluid electrons). extent which this can reproduce full-kinetic description 2D MR, particular focus on its robustness during non-linear stage, evaluated. perform moderate guide field by means three models: hybrid-Vlasov-Maxwell isotropic, isothermal electrons, hybrid-Vlasov-Landau-fluid (HVLF) where anisotropic equipped Landau-fluid closure, one. When compared case, HVLF effectively reproduces main features as well several aspects associated micro-physics feedback onto proton dynamics. This global evolution local so-called electron-diffusion region, species pressure anisotropy. In particular, anisotropy driven instabilities (such firehose, mirror, cyclotron instabilities) relevant regulating electrons stage As expected, captures all these features, except for electron-cyclotron instability.