Angular diameter distance as a perform of redshift in CCC+TL and ΛCDM fashions. Credit score: The Astrophysical Journal (2024). DOI: 10.3847/1538-4357/ad1bc6
The present theoretical mannequin for the composition of the universe is that it is manufactured from regular matter, darkish vitality and darkish matter. A brand new College of Ottawa examine challenges this.
A examine, printed at present in The Astrophysical Journal, challenges the present mannequin of the universe by displaying that, actually, it has no room for darkish matter.
In cosmology, the time period “darkish matter” describes all that seems to not work together with mild or the electromagnetic area, or that may solely be defined by way of gravitational pressure. We won’t see it, nor do we all know what it is manufactured from, however it helps us perceive how galaxies, planets and stars behave.
Rajendra Gupta, a physics professor on the School of Science, used a mixture of the covarying coupling constants (CCC) and “drained mild” (TL) theories (the CCC+TL mannequin) to succeed in this conclusion.
This mannequin combines two concepts—about how the forces of nature lower over cosmic time and about mild shedding vitality when it travels a protracted 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 mild from the early universe has advanced.
This discovery challenges the prevailing understanding of the universe, which means that roughly 27% of it’s composed of darkish matter and fewer than 5% of odd matter, remaining being the darkish vitality.
Difficult the necessity for darkish matter within the universe
“The examine’s findings affirm that our earlier 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 darkish matter to exist,” explains Gupta.
“In commonplace cosmology, the accelerated growth of the universe is alleged to be brought on by darkish vitality however is actually as a result of weakening forces of nature because it expands, not resulting from darkish vitality.”
“Redshifts” confer with when mild is shifted towards the purple a part of the spectrum. The researcher analyzed information from current papers on the distribution of galaxies at low redshifts and the angular dimension of the sound horizon within the literature at excessive redshift.
“There are a number of papers that query the existence of darkish matter, however mine is the primary one, to my data, that eliminates its cosmological existence whereas being in line with key cosmological observations that now we have had time to substantiate,” says Gupta.
By difficult the necessity for darkish 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.
Extra data:
Rajendra P. Gupta, Testing CCC+TL Cosmology with Noticed Baryon Acoustic Oscillation Options, The Astrophysical Journal (2024). DOI: 10.3847/1538-4357/ad1bc6
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New analysis means that our universe has no darkish matter (2024, March 15)
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