Speaker
Sveva Castello
(University of Geneva)
Description
The weak equivalence principle is a fundamental pillar in our understanding of gravity, stating that any test particle falls in a gravitational potential in the same way, regardless of its composition. The validity of this principle for dark matter remains a key open question, which is however rarely addressed in cosmological analyses and often studied under the assumption of specific models. In my talk, I will introduce a model-independent test of this principle based on the cross-correlation of two populations of galaxies. In particular, I will highlight the crucial role played by large-scale relativistic effects, most notably the distortion of time, which will be measurable with upcoming galaxy surveys.
Author
Sveva Castello
(University of Geneva)
Co-authors
Ziyang Zheng
Camille Bonvin
Luca Amendola
