October 6th, 2024

New research suggests that our universe has no dark matter

New research from the University of Ottawa suggests that dark matter may not exist, proposing that the universe's accelerated expansion results from weakening natural forces rather than dark energy, challenging conventional cosmological models.

Read original articleLink Icon
New research suggests that our universe has no dark matter

New research from the University of Ottawa challenges the conventional understanding of the universe's composition, suggesting that dark matter may not exist at all. The study, published in The Astrophysical Journal, utilizes a new model combining covarying coupling constants (CCC) and "tired light" (TL) theories, which posits that the forces of nature weaken over cosmic time and that light loses energy as it travels. This model aligns with various observations regarding galaxy distribution and the evolution of light from the early universe. The findings indicate that the universe does not require dark matter, which has traditionally been thought to make up about 27% of the universe's mass-energy content. Instead, the study suggests that the accelerated expansion of the universe is due to the weakening of natural forces rather than dark energy. The research opens new avenues for exploring the fundamental properties of the universe and challenges the necessity of dark matter in cosmological models.

- New research suggests the universe may not contain dark matter.

- The study uses a model combining CCC and TL theories to explain cosmic phenomena.

- Findings indicate that the universe's accelerated expansion is due to weakening forces, not dark energy.

- The research aligns with observations of galaxy distribution and light evolution.

- This study challenges existing cosmological models and opens new research avenues.

Related

Scientists may have found an answer to the mystery of dark matter

Scientists may have found an answer to the mystery of dark matter

Scientists research dark matter, an invisible substance crucial for understanding the universe. Recent studies propose primordial black holes as a solution, suggesting they could account for dark matter and be detected by gravitational wave detectors.

The surprising behavior of black holes in an expanding universe

The surprising behavior of black holes in an expanding universe

Physicist Nikodem Popławski's study reveals black hole behavior in an expanding universe. Einstein's equations suggest a constant expansion rate at black hole event horizons, challenging previous assumptions and shedding light on the Hubble tension. Popławski's work hints at a link between black holes, wormholes, and dark energy.

The Higgs particle could have ended the universe by now – Why are we still here?

The Higgs particle could have ended the universe by now – Why are we still here?

Research from King's College London indicates the universe is meta-stable, with a low risk of catastrophic phase transition related to the Higgs boson, challenging models involving primordial black holes.

The universe had a secret life before the Big Bang, new study hints

The universe had a secret life before the Big Bang, new study hints

A study suggests the universe may have contracted before the Big Bang, proposing dark matter consists of primordial black holes. Gravitational waves from this phase could be detected by future observatories.

Do we live in a shell universe?

Do we live in a shell universe?

Recent research introduces the "shell universe" model, proposing a thick shell of matter around a central void, potentially resolving Hubble tension and redefining cosmic evolution, but requiring further validation.

Link Icon 9 comments
By @jetrink - 7 months
I think we need a version of the New Battery Technology Checklist[1] for this type of article. (Though I understand that the research itself often just aims solve specific tensions in cosmology, and it is only the reporting that over-hypes it as a full replacement for dark matter.)

Dear alternative dark matter theory claimant,

Thank you for your submission of a proposed revolutionary theory to replace dark matter. Your new theory claims to be superior to dark matter models and will transform our understanding of the universe. Unfortunately, your theory will likely fail, because:

[ ] It cannot explain galaxy rotation curves across all galaxy types.

[ ] It fails to account for gravitational lensing observed in galaxy clusters.

[ ] It cannot explain the Bullet Cluster observations where dark matter appears separated from normal matter.

[ ] It is inconsistent with the cosmic microwave background anisotropies.

[ ] It cannot explain the large-scale structure and formation of the universe.

[ ] It introduces arbitrary parameters without physical justification.

[ ] It lacks a sound theoretical foundation or violates established physics principles.

[ ] It fails to explain the observed velocity dispersions in dwarf spheroidal galaxies.

[ ] It cannot account for empirical relations like the Tully-Fisher relation.

[ ] It cannot be tested or falsified by current or near-future experiments.

[ ] Your claims are unfounded or exaggerated.

1. https://news.ycombinator.com/item?id=26633670

By @gmane - 7 months
Sorry, the conclusion in the paper really underlies how poorly the results fit the evidence: "The resulting almost doubling in the age of the Universe and increasing the formation times by 1 order of magnitude has been a subject of concern and requires that the new model also explain some critical cosmological and astrophysical observations" [0]

Call me skeptical of the claims made.

[0] https://iopscience.iop.org/article/10.3847/1538-4357/ad1bc6#...

By @pdonis - 7 months
"Tired light" has been debunked for decades. Unfortunately, phys.org articles are notorious for not pointing out things like this.
By @andrewflnr - 7 months
> The new model is a hybrid model that combines the tired light (TL) theory with a variant of the ΛCDM model in which the cosmological constant is replaced with a covarying coupling constants' (CCC) parameter α.

Are the dark-matter-phobes going to pretend this is "simpler" than dark matter w.r.t Occam's razor? I bet they are. Can't wait.

By @perihelions - 7 months
More comments here (it's the same paper):

https://news.ycombinator.com/item?id=39742010 ("Hypothesis That Universe Has No Dark Matter and Is 27B Years Old"; 71 comments)

By @mattmaroon - 7 months
Dark matter to me seems a lot like the ether. Our understanding is wrong and we don’t know how or why so we invented a fudge factor to explain it. One day people will think we were silly to believe it.
By @foobarkey - 7 months
Probably not and its just our too primitive understanding and “trying to make the calculations work”