Axial Bianchi IX meets Gaia data
arXiv:2608.02371 · doi:10.1088/1361-6382/ae8116
Abstract
The aim of the present work is two-fold: {\it(i)} Compute the drift of comoving extragalactic sources in axial Bianchi IX universes, in particular in those satisfying Einstein's equations with positive cosmological constant and comoving dust. {\it(ii)} Linearize this drift (and for comparison the previously calculated Lema{î}tre-Hubble diagram) simultaneously in small anisotropy and in small positive curvature. We find that the drift in this linear approximation coincides with the drift in axial Bianchi I universes. This is not true for Lema{î}tre-Hubble diagrams.
19 pages