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windy miller
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New claims being made dark energy is not a cosmological constant.
http://inspirehep.net/record/1511241?ln=en
Any thoughts?
http://inspirehep.net/record/1511241?ln=en
Any thoughts?
The claim is that the best fit is a dynamical DE model and the ΛCDM is disfavoured (which is not the same as saying that it is excluded).While, at present, the Bayesian evidence for the dynamical DE is insufficient to favour it over ΛCDM
windy miller said:New claims being made dark energy is not a cosmological constant.
http://inspirehep.net/record/1511241?ln=en
Any thoughts?
While, at present, the Bayesian evidence for the dynamical DE is insufficient to favour it over ΛCDM, we show that, if the current best fit DE happened to be the true model, it would be decisively detected by the upcoming DESI survey.
This turns out to be one of those things that is remarkably difficult to estimate well. The problem is that there's no one good model for how dark energy might vary, so that scientists end up comparing the cosmological constant to what essentially amounts to fitting a curve. That curve fitting will always produce a tighter fit to the data, so it becomes a question of how much better a fit is meaningful.windy miller said:New claims being made dark energy is not a cosmological constant.
http://inspirehep.net/record/1511241?ln=en
Any thoughts?
Dark energy is a theoretical form of energy that is thought to make up approximately 70% of the universe. It is believed to be responsible for the observed accelerated expansion of the universe.
Dark energy is measured through its effects on the expansion of the universe. This is done through observations of distant supernovae, cosmic microwave background radiation, and galaxy clustering.
Recent studies have shown that the amount of dark energy in the universe may not be constant over time, but rather is increasing at a faster rate than previously thought.
The evidence for the new claims comes from observations of Type Ia supernovae, which are exploding stars that are used as standard candles to measure distances in the universe. These observations suggest that the expansion of the universe is accelerating at a faster rate than predicted by the current model of dark energy.
If the new claims are confirmed, it could mean that the current understanding of dark energy and its role in the expansion of the universe is incomplete. This could lead to a reevaluation of current theories and potentially new insights into the nature of dark energy and the universe as a whole.