Vorticity in the large-scale matter flow is expected in ΛCDM to be very small on linear scales, with the cosmic web largely described by irrotational flows except in non-linear cluster cores (Bernardeau 2002; Pueblas & Scoccimarro 2009). Simulations and observations now indicate that significant vorticity is associated with filaments themselves, with halo and galaxy spins aligned with filament vorticity, hints that entire filaments may rotate (Codis 2015; Wang 2021). Tudorache 2025 reports filament bulk rotation at 110 km/s.
The standard model treats large-scale flows as irrotational on linear scales, with vorticity emerging only from non-linear shock physics in cluster cores. Significant filament-scale vorticity 10 to 20 times above tidal-torque-theory predictions has no source in the model except as enhanced non-linear coupling that is hard to model from first principles.
SCT replaces the hot-dense-center with a superluminal collision and the thermalized debris field. From this single change, filament vorticity is a direct geometric signature of the cascade-stream origin. Each filament inherits bulk angular momentum J = μ(b × v_rel) from its parent cascade-stream event (P22, P31, P32). The cosmic-web filaments are direct geometric products of head-on (low-b) cascade collisions (P33, P34); they form with bulk rotation as a feature of their cascade-stream origin, not as a late-time addition.
The Tudorache 2025 observation of 110 km/s bulk rotation in a single filament matches the SCT prediction at the calibrated cascade-J level. The 10 to 20x excess relative to standard tidal-torque theory is the expected M3 signal: tidal-torque theory has no mechanism for cascade-deposited bulk J, so it underestimates the rotation by exactly the J-inheritance factor. Multi-filament MeerKAT and SKA observations should confirm the J_filament ∝ M^(2/3) scaling expected from the cascade impact-parameter distribution P(b) ∝ b (P34, recid 32).
The same M3 framework that produces galaxy spin alignments along filament axes, cluster spin axes perpendicular to nearest filaments, satellite-plane co-rotation around hosts, and the quasar polarization 1 Gpc coherence produces the filament vorticity signal. Each is a different observational projection of the same cascade-deposited J vector at the appropriate scale. There is no need to invoke enhanced non-linear coupling or modified gravity at filament scales.
If precision MeerKAT + SKA filament-rotation surveys find vorticity consistent with standard tidal-torque-theory expectations at the 1% level (no 10 to 20x excess, no J_filament ∝ M^(2/3) cascade-scaling), the M3 cascade-J inheritance is refuted. The Tudorache 2025 observation should be reproducible and the population-level scaling testable across hundreds of filaments.