Sejong University

New method of measuring gravity with 3D velocities of wide binary stars is developed and confirms modified gravity at low acceleration

Astrophysicist Kyu-Hyun Chae develops a new method to measure gravity with 3D velocities of wide binary stars, confirming modified gravity at low acceleration. The results show that standard gravity is outside the 99.997% probability range for internal accelerations below 1 nm/s^2.

SourceSejong University·JournalThe Astrophysical Journal·TypeComputational simulation/modeling·DateMay 27, 2025

Direct evidence for modified gravity at low acceleration from Gaia observations of wide binary stars

A new study by Kyu-Hyun Chae found conclusive evidence for the breakdown of standard gravity in low acceleration limit using up to 26,500 wide binaries observed by Gaia. The results show a boost factor of 30-40% higher than Newton-Einstein prediction, meeting conventional criteria of 5 sigma significance.

SourceSejong University·JournalThe Astrophysical Journal·TypeData/statistical analysis·DateAug 11, 2023