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physics.plasm-ph2026
Normal-Field Evolution and the Breakdown of Classical Tearing in Current Sheets
Grzegorz Kowal, Diego A. Falceta-Gonçalves
Classical resistive tearing theory assumes a prescribed current-sheet equilibrium, but a finite normal magnetic field can evolve the background on the tearing timescale. For a tran…
physics.plasm-ph2026
Tearing Instability in Gyrotropic MHD: Effects of Equilibrium Pressure Anisotropy
Grzegorz Kowal, Gabriel L. Ferreira-Santos, Diego A. Falceta-Gonçalves
Weakly collisional plasmas are widespread in astrophysics and can sustain pressure anisotropy, yet most analytical tearing-mode scalings assume an isotropic equilibrium. We develop…
physics.plasm-ph2025
Unveiling a New -Scaling of the Tearing Instability in Weakly Collisional Plasmas
Gabriel L. Ferreira-Santos, Grzegorz Kowal, Diego A. Falceta-Gonçalves
We investigate the linear tearing instability in weakly collisional plasmas using a non-ideal gyrotropic-MHD framework, uncovering a previously unknown scaling relation for the ins…