A Density-Screened Power-Law Modification of Gravity Across Galactic and Cluster Scales

This work investigates a density-screened modification of gravity characterized by a universal power-law contribution with exponent n \approx 1.8. Across a wide range of astrophysical systems, from dwarf and low-surface-brightness galaxies to massive galaxy clusters, this value consistently reproduces observed kinematics without system-dependent retuning. The framework explores an alternative phenomenological approach in which a universal power-law gravitational contribution operates in low-density environments and becomes suppressed in high-density regions."