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New research puts age of universe at 26.7 billion years, nearly twice as old as previously believed (phys.org)

submitted 1 year ago by L4s@lemmy.world to c/technology@lemmy.world

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New research puts age of universe at 26.7 billion years, nearly twice as old as previously believed::Our universe could be twice as old as current estimates, according to a new study that challenges the dominant cosmological model and sheds new light on the so-called "impossible early galaxy problem."

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[–] ashe@lemmy.starless.one 15 points 1 year ago

https://doi.org/10.1093/mnras/stad2032

I wasn't able to read the actual paper since it's behind a paywall, but it's not exclusively a TL model. They say this in the abstract:

Deep space observations of the James Webb Space Telescope (JWST) have revealed that the structure and masses of very early Universe galaxies at high redshifts (⁠z∼15), existing at ∼0.3 Gyr after the BigBang, may be as evolved as the galaxies in existence for ∼10 Gyr. The JWST findings are thus in strong tension with the ΛCDM cosmological model.

While tired light (TL) models have been shown to comply with the JWST angular galaxy size data, they cannot satisfactorily explain isotropy of the cosmic microwave background (CMB) observations or fit the supernovae distance modulus vs. redshift data well.

We present a model with covarying coupling constants (CCC), starting from the modified FLRW metric and resulting Einstein and Friedmann equations, and a CCC + TL hybrid model. They fit the Pantheon + data admirably, and the CCC + TL model is compliant with the JWST observations. [..] One could infer the CCC model as an extension of the ΛCDM model with a dynamic cosmological constant.