Fermi Bubbles as Galactic-Scale Cadence Cavities

The Fermi Bubbles are two enormous gamma-ray lobes extending roughly 8–10 kpc above
and below the Galactic Centre, accompanied by even larger 12–14 kpc eROSITA X-ray
structures. Their sharp edges, bilateral symmetry, latitude-invariant spectral break energy,
and spectral hardening at the rim remain difficult to reconcile with standard hydrodynamic
or magnetohydrodynamic outflow models, which require finely tuned collimated injections
or repeated tidal disruption events to maintain such morphology. This paper introduces a
mechanical interpretation grounded in the Cohesion UFT framework (Gilbert 2025–2026)
in which the bubbles are cadence cavities — regions of reduced field density and elevated
structural recursion rate — bounded by cadence shock fronts. The cadence shock front
is a discontinuity in the local recursion rate driven by the field-density gradient at the
bubble boundary. This framework naturally explains the bubbles’ morphology, spectral
behaviour, and stability without requiring fine-tuned astrophysical conditions, and yields
specific, falsifiable predictions distinguishable from conventional shock models across gammaray, X-ray, and radio wavelengths.