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SUMMARY:What do acoustic scale observations tell us about dark energy? - A
 ntony Lewis (University of Sussex)
DTSTART:20251020T120000Z
DTEND:20251020T130000Z
UID:TALK238792@talks.cam.ac.uk
CONTACT:Louis Legrand
DESCRIPTION:I explore how cosmic microwave background (CMB) and baryon aco
 ustic oscillation (BAO) measurements constrain cosmological models. The CM
 B angular scale provides robust constraints on the ratio of sound horizon 
 to angular diameter distance\, limiting possible deviations from the stand
 ard ΛCDM model. The null energy condition for a separate dark energy comp
 onent imposes strict inequalities on BAO observables relative to ΛCDM pre
 dictions\, restricting the freedom to fit new data within standard cosmolo
 gical frameworks.  I’ll discuss what this means for latest BAO results a
 nd other possible interpretations.
LOCATION:CMS\, Pav. B\, CTC Common Room (B1.19) [Potter Room]
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