“A First Look at Cepheids in a Type Ia Supernova Host with JWST” may have just killed the CMBR H0.
PS: I’m a little perturbed with Wolfram. Mathematica returns the model-reliant CMBR H0 and doesn’t provide more directly empirical distance ladder H0.
Fortunately, my notebooks that depend on H0 are easy to correct by manually entering what now appears to be the correct value – but I will have to go through and find all such occurrences.
I’ve been cross-checking for consistency with incoming JWST observations a fringe physics theory that makes radically different cosmological predictions. One of the predictions is that the lambdaCDM model will give incorrect values for H0 – and another prediction is that JWST would find much more mature galactic evolution in the early universe than lambdaCDM adherence had been leading us to believe. Another prediction, made before the “dark energy” theory of accelerating cosmic acceleration parameterized GR to fit the observations, was that there would be cosmic acceleration.
I suppose I’ll have to write up another of my “fringe” memoirs on this,. Although it is on-going, it is interesting given the current torrent of news out of JWST.