Partial Collapse in CCEGA: Ultracompact Objects as a Third Endpoint of Stellar Evolution

CCEGA predicts a third endpoint of stellar evolution beyond neutron stars and black holes: ultracompact objects in partial collapse stabilized by G_eff(ρ) = G_N·exp(−ρ/ρ_c) suppression. Mass range 2.33–9.20 M☉ (P36), no event horizon, matter at ρ_c in metastable equilibrium with lifetime >> t_Hubble. Equilibrium mechanism derived from G_eff brake. A 3.5 M☉ compact object without EM counterpart would be direct detection. GW190814 (2.59 M☉) and GW230529 (2.5–4.5 M☉) are natural candidates. CCEGA Program Paper 40.