Kinematic cosmic dipole from a large sample of strong lenses

This paper proposes a novel method to estimate the kinematic cosmic dipole using strong gravitational lenses with well-measured Einstein radii, leveraging the relativistic distortion of the Einstein angle. This method is robust, insensitive to galaxy evolution uncertainties, and could detect the dipole at a 2-sigma level within a decade using upcoming surveys like Euclid and LSST, offering a new way to resolve the current tension in dipole measurements.