Λ Constant, a₀ Evolving: High-Redshift Galaxy Masses

Recent observations by the James Webb Space Telescope (JWST) have identified a population of massive galaxies at redshifts z>10 that present challenges for the standard ΛCDM framework of structure formation. MIT predicts that the MOND acceleration scale a₀ is not a universal constant but an epoch-dependent quantity scaling with the Hubble parameter H(z). This scaling follows directly from the identification of a₀ as an edge mode (n=1) referencing the evolving Hubble horizon. The prediction a₀(z=10) ≈ 20×a₀(0) implies enhanced effective gravitational binding during early galaxy assembly, accelerating structure formation without requiring modifications to star formation efficiency. Critically, MIT predicts a₀ evolves while the cosmological constant Λ remains fixed—the inverse of standard assumptions. Both predictions are independently testable with future high-redshift observations. Latest derivation of this paper can be found at github.com/early-galaxiesv4 update: reformatted as explicit MIT supplement with revised title; removed "hypothesis" framing for more declarative language throughout; condensed by removing standalone Theoretical Context section; falsification threshold specified as 2σ (previously "within 10%"); added inline citations. Core derivations and predictions unchanged.