Speaker
Dragan Huterer
(University of Michigan, 450 Church St Ann Arbor, MI 48109, United States)
Description
Over the past several years, a foremost development in cosmology has been the rise of the so-called Hubble tension. This refers to the disagreement between the measurements of the expansion rate of the universe - the Hubble constant (H0). Direct measurements of H0 using the astronomical "distance ladder" find H0 of about 67 km/s/Mpc, while the analysis of the cosmic microwave background anisotropies finds 74 km/s/Mpc, with both measurement errors small enough to make the discrepancy highly statistically significant. I will explain the ingredients that go into the two measurements, and the difficulty of explaining the tension with unaccounted-for systematic errors.
Primary author
Dragan Huterer
(University of Michigan, 450 Church St Ann Arbor, MI 48109, United States)
