GRG18 Day 2
Last up this morning we heard from Eisenstein on "Observing Dark Energy". He explained nicely his lack of theoretical prejudice as to the cause, but that wasn't until half way through the talk. The first half of the talk summarised in general terms a long list of evidence for apparent acceleration, including the supernovae, CMB acoustic scale, cluster abundances, cluster baryon mass fractions, galaxy-galaxy weak lensing and large scale structure. Having given the impression that he took all this as evidence for a cosmological constant, at question time he was bombarded with comments from D. Wiltshire, A. Vilenkin and I. Neupane.