'Early Dark Energy' Could Explain the Crisis in Cosmology universetoday storybywill
. Unfortunately, these two methods produce different results, the former yielding a value of ~73 km/s per megaparsec and the latter yielding ~67 km/s Mpc. As Dr. Reiss broke it down to Universe Today via email:
But as Reiss adds, the mystery of the Hubble Tension is not as much of a problem as it is an opportunity for new discovery. So far, many candidates have been offered to explain the discrepancy, ranging from the existence of extra radiation, modified General Relativity ,, primordial magnetic fields, or the existence of Dark Matter and Dark Energy during the early Universe that behaved in different ways. These can generally be divided into two categories: early-time and late-time solutions .
The Cosmic Distance Ladder, the Solar System to the stars to nearby galaxies to distant ones, is used to measure the Hubble Constant. Credit: NASA/ESA/A. Feild /A. Riess ) What makes EDE preferable to late-time solutions is how the latter implies the existence of a fluid that effectively creates energy out of nothing – which violates the strong energy condition predicted by GR. What’s more, such models are difficult to reconcile with the Cosmic Distance Ladder measurements of Cepheid variables and Type Ia supernovae in nearby galaxies and Type Ia supernovae in distant galaxies .
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