The Structural Plenitude Theory (SPT v1.2): Phenomenological Implications of a Viscoelastic Vacuum

Version 1.2 — Phenomenological implications of Structural Plenitude Theory (SPT). This work extends the Structural Plenitude Theory (SPT v1.1) by deriving macroscopic phenomenological consequences from the viscoelastic vacuum postulate, without introducing new axioms. The analysis connects the substrate–matter coupling coefficient inferred from spectral observables to geophysical and astrophysical phenomena, including latitudinal thermal gradients, auroral emissions, and refractive modulation. In this framework, the vacuum (Pleroma) acts as a dynamical medium whose local excitation state depends on the tangential velocity of the rotating reference frame. Variations in coupling efficiency are shown to affect thermal absorption, radiative dissipation pathways, and effective refractive behavior. These effects are treated as testable consequences governed by the same parameter controlling spectral broadening, providing explicit falsifiability criteria. This version is phenomenological in scope and is fully dependent on the foundational postulates established in SPT v1.1.