3 papers
astro-ph.CO2026
Testing the equivalence principle across the Universe: a model-independent approach with galaxy multi-tracing
Sveva Castello, Ziyang Zheng, Camille Bonvin +1
We present a test of the equivalence principle on cosmological scales. This cornerstone of general relativity has been tested with high precision for standard matter, but its valid…
astro-ph.CO2026
Testing the cosmological Euler equation: viscosity, equivalence principle, and gravity beyond general relativity
Ziyang Zheng, Malte Schneider, Luca Amendola
We investigate how the cosmological Euler equation can be tested in the presence of viscous dark matter, violations of the equivalence principle (EP), and modifications of gravity,…
astro-ph.CO2024
The distribution of Bayes' ratio
Luca Amendola, Vrund Patel, Ziad Sakr +2
The ratio of Bayesian evidences is a popular tool in cosmology to compare different models. There are however several issues with this method: Bayes' ratio depends on the prior eve…