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SUMMARY:George Efstathiou (Kavli Institute for Cosmology\, Cambridge)
DTSTART:20201216T151500Z
DTEND:20201216T163000Z
DTSTAMP:20260423T040328Z
UID:XmasIFT/2
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/XmasIFT/2/">
 The Hubble Tension</a>\nby George Efstathiou (Kavli Institute for Cosmolog
 y\, Cambridge) as part of XXVI IFT Christmas Workshop\n\n\nAbstract\nI wil
 l review the constraints on H_0 from the Planck CMB measurements and compa
 re the best fit Planck model with recent results from ACTpol. The CMB valu
 e 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 exp
 lain 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.\n
LOCATION:https://researchseminars.org/talk/XmasIFT/2/
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