3 papers
gr-qc2026
Exploring the CMB in Anisotropic Universes
Robbert W. Scholtens, Marcello Seri, Holger Waalkens +1
In recent years, there have been increasing challenges to the cosmological principle, based on new observations of e.g. supernovae and the cosmic bulk flow. As a result, the cosmol…
gr-qc2026
Fundamental Cosmic Anisotropy and its Ramifications II: Perturbations in Bianchi spacetimes, and fixed in the Newtonian gauge
Robbert W. Scholtens, Marcello Seri, Holger Waalkens +1
The standard cosmological model is challenged by an ever-growing collection of observations, which invites (and stimulates) inquiry into possible additions and/or alterations. One…
gr-qc2025
Fundamental Cosmic Anisotropy and its Ramifications I: Killing vector fields and constructing their metric
Robbert W. Scholtens, Marcello Seri, Holger Waalkens +1
On the largest scales, the universe appears to be almost homogeneous and isotropic, adhering to the cosmological principle. In contrast, on smaller scales inhomogeneities and aniso…