The Hubble Tension
George Efstathiou (Kavli Institute for Cosmology, Cambridge)
16-Dec-2020, 15:15-16:30 (5 years ago)
Abstract: I will review the constraints on H_0 from the Planck CMB measurements and compare the best fit Planck model with recent results from ACTpol. The CMB value of H_0 is secure, yet is in tension with Cepheid based measurements of H_0. Although the CMB value is based on the Lambda CDM cosmology, there has been no compelling theoretical modification of the model that can explain the tension. I will therefore explore whether systematic errors may be affecting the Cepheid distance scale and if so, what must these errors look like.
Physics
Audience: researchers in the topic
| Organizer: | Jose Barbon* |
| *contact for this listing |
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