Théorie de la Chronodynamique de la Densité (TCD) – cadre phénoménologique exploratoire et pistes d'extension covariante

This work introduces an exploratory phenomenological framework termed the Theory of Density Chronodynamics (TCD). The model investigates whether effective modifications of gravitational dynamics at galactic scales may emerge from density-dependent structural properties rather than additional matter components. The formulation is constructed to remain compatible with General Relativity in well-tested regimes, while proposing a correction factor that becomes relevant in specific gravitational contexts. Comparisons with selected galactic rotation curve data are presented at a preliminary level. The approach is not claimed as a complete covariant theory but as a structured hypothesis intended to clarify potential links between density, effective metric behavior, and large-scale gravitational phenomena. Future developments may explore covariant extensions within modified curvature frameworks.