Sixteenth Marcel Grossmann Meeting

Exploring Cosmological Concordance with ACT DR4, Planck, and Beyond

8 Jul 2021, 17:11

22m

Invited talk in the parallel session Status of the H_0 and sigma_8 tensions: theoretical models and model-independent constraints Status of the H_0 and Sigma_8 Tensions: Theoretical Models and Model-Independent Constraints

Speaker

J. Colin Hill (Columbia University)

Description

I will discuss recent and ongoing work focused on attempts to restore concordance amongst cosmological data sets in the context of the H0 and S8 tensions. Particular attention will be paid to models invoking new physics at or prior to recombination, including small-scale baryon-clumping models (e.g., due to primordial magnetic fields) and quasi-accelerating early dark energy models.

Presentation materials

JCH_MarcelGrossman_July2021.pdf