Abstract Cosmic opacity and its spatial distribution have been constrained with a model independent method. The average opacity of the universe is not zero, but can be zero in the 1σ error range. The best-fit value of the spatial distribution of cosmic opacity is not a constant as the redshift varies, though a homogeneous and transparent universe is favored in the 2σ error range.
Keywords cosmology: observations — cosmology: distance scale — opacity
It accepts original submissions from all over the world and is internationally published and distributed by IOP