Tag: #act

Joint ACT–Planck analysis strengthens hint of cosmic birefringence but systematics remain

Joint ACT–Planck analysis finds a 0.277° cosmic-birefringence hint at 4.8σ, but calibration and dust systematics mean a firm detection remains out of reach.

#cosmicbirefringence, #cosmology, #cmb, #planck, #act

Preprint claims first detection of 'moving lens' effect in CMB at 4.8σ

An arXiv preprint reports a 4.8σ detection of the 'moving lens' effect in the CMB using ACT and DESI, a claimed new probe of transverse cosmic velocities.

#cosmology, #cmb, #act, #desi, #astrophysics