3 papers
astro-ph.CO2026
Cosmic topology. Part Va. Information content of the observable Universe
Deyan P. Mihaylov, Mikel Martin Barandiaran, Stefano Anselmi +14
If the Universe possesses a compact spatial topology with characteristic scale not much larger than the diameter of the observable Universe, then the associated symmetry transforma…
astro-ph.CO2026
Multipolar structure of the local expansion rate from incomplete sky data
João G. Vicente, Thiago S. Pereira, Ricardo G. Rodrigues +2
Using the Cosmicflows-4 data, we reconstruct the first multipolar moments of a general function describing the local expansion rate. In addition to the conventional harmonic approa…
astro-ph.CO2024
Fréchet Vectors as sensitive tools for blind tests of CMB anomalies
Ricardo G. Rodrigues, Thiago S. Pereira, Miguel Quartin
Cosmological data collected on a sphere, such as CMB anisotropies, are typically represented by the spherical harmonic coefficients, denoted as . The angular power spec…