MATs (Monday Afternoon Talks)
3:00pm – Xiurui, CfA
3:30pm – Sebastian von Hausegger
The cosmic matter dipole
The ever-growing quantity and quality of astronomical data today has underpinned both the LCDM model of cosmology and general relativity as effective working theories. Yet also tensions between theoretical prediction and observation, and even between different observations arose. I will centre my presentation on one such discrepancy — the excess amplitude of the cosmic matter dipole in the number density of high-redshift galaxies. This observation represents a significant challenge to the Cosmological Principle, upon which the LCDM model is built, evocative of inhomogeneous and anisotropic cosmological models. I will present details of this analysis, and also provide an overview of the relevant literature and elaborate on consequences as well as future research directions.
Host: Josh Borrow