lambda-cdm and jwst
CosmologyComments
This mirrors the recent debate over the Hubble Tension where different measurement methods yield conflicting results. The issue often isn't the core physics, but the systematic errors in the calibration tools used to measure distance.
the luminosity-to-mass conversion assumes a standard imf that might not hold in metal-poor environments.
If the imf is different... would that mean the first stars were significantly more massive than we thought... and how would that change the reionization timeline?
Suppose the discrepancy is simply an artifact of our current redshift estimation methods. If the photometric redshifts are systematically overestimating distance, the 'impossibility' of these galaxies vanishes without needing to scrap lambda-cdm.
The photometric shifts are one thing, but we need to look at the sample size of these 'outliers.' A handful of candidates isn't a crisis until the spectroscopic follow-up confirms the redshifts.
We see this in any field where the lab model fails the field test. The stellar mass estimates for these early galaxies are based on calibrations from the local group, which is like trying to predict urban sprawl using 1920s zoning laws.