New research suggests that our universe has no dark matter

The present theoretical mannequin for the composition of the universe is that it is fabricated from regular matter, darkish vitality and dark matter. A brand new College of Ottawa examine challenges this.

A examine, published immediately in The Astrophysical Journal, challenges the present mannequin of the universe by exhibiting that, actually, it has no room for dark matter.

In cosmology, the time period “dark matter” describes all that seems to not work together with gentle or the electromagnetic field, or that may solely be defined by means of gravitational force. We will not see it, nor do we all know what it is fabricated from, but it surely helps us perceive how galaxies, planets and stars behave.

Rajendra Gupta, a physics professor on the College of Science, used a mixture of the covarying coupling constants (CCC) and “drained gentle” (TL) theories (the CCC+TL mannequin) to achieve this conclusion.

This mannequin combines two concepts—about how the forces of nature lower over cosmic time and about gentle dropping vitality when it travels an extended distance. It has been examined and has been proven to match up with a number of observations, similar to about how galaxies are unfold out and the way gentle from the early universe has developed.

This discovery challenges the prevailing understanding of the universe, which means that roughly 27% of it’s composed of dark matter and fewer than 5% of ordinary matter, remaining being the darkish vitality.

Difficult the necessity for dark matter within the universe

“The examine’s findings affirm that our previous work (“JWST early universe observations and ΛCDM cosmology”) concerning the age of the universe being 26.7 billion years has allowed us to find that the universe doesn’t require dark matter to exist,” explains Gupta.

“In customary cosmology, the accelerated enlargement of the universe is claimed to be brought on by darkish vitality however is actually because of the weakening forces of nature because it expands, not because of dark energy.”

“Redshifts” check with when gentle is shifted towards the purple a part of the spectrum. The researcher analyzed information from latest papers on the distribution of galaxies at low redshifts and the angular measurement of the sound horizon within the literature at excessive redshift.

“There are a number of papers that query the existence of dark matter, however mine is the primary one, to my information, that eliminates its cosmological existence whereas being per key cosmological observations that we have now had time to verify,” says Gupta.

By difficult the necessity for dark matter within the universe and offering proof for a brand new cosmological mannequin, this examine opens up new avenues for exploring the elemental properties of the universe.