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We introduce a new asymptotic ansatz for spherical perturbations of theStandard Model of Cosmology (SM) which applies during the $p=0$ epoch, andprove that these perturbations trigger instabilities in the SM on the scale ofthe supernova data. These instabilities create a large, central region ofuniform under-density which expands faster than the SM, and this central regionof accelerated uniform expansion introduces into the SM {\it precisely} thesame range of corrections to redshift vs luminosity as are produced by thecosmological constant in the theory of Dark Energy. A universal behavior isexhibited because all sufficiently small perturbations evolve to a singlestable rest point. Moreover, we prove that these perturbations are consistentwith, and the instability is triggered by, the one parameter family ofself-similar waves which the authors previously proposed as possibletime-asymptotic wave patterns for perturbations of the SM at the end of theradiation epoch. Using numerical simulations, we calculate the unique wave inthe family that accounts for the same values of the Hubble constant andquadratic correction to redshift vs luminosity as in a universe with seventypercent Dark Energy, $\Omega_{\Lambda}\approx.7$. A numerical simulation of thethird order correction associated with that unique wave establishes a testableprediction that distinguishes this theory from the theory of Dark Energy. Thisexplanation for the anomalous acceleration, based on instabilities in the SMtogether with simple wave perturbations from the radiation epoch that triggerthem, provides perhaps the simplest mathematical explanation for the anomalousacceleration of the galaxies that does not invoke Dark Energy.

An Instability of the Standard Model Creates the Anomalous Acceleration Without Dark Energy