Can small-scale baryon inhomogeneities resolve the Hubble tension? An investigation with ACT DR4
Can small-scale baryon inhomogeneities resolve the Hubble tension? An investigation with ACT DR4
The authors analyze an appealing attempt to resolve the Hubble tension that modifies the physics around the time of recombination by small-scale baryon density inhomogeneities (e.g. by primordial magnetic fields). Using the most recent data of the Atacama Cosmology Telescope (ACT), they find that baryon clumping on the CMB is …