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Angular diameter distance as a operate of redshift in CCC+TL and ΛCDM fashions. Credit score: The Astrophysical Journal (2024). DOI: 10.3847/1538-4357/ad1bc6
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Angular diameter distance as a operate 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 fabricated from regular matter, darkish power and darkish matter. A brand new College of Ottawa examine challenges this.
A examine, printed right this moment in The Astrophysical Journal, challenges the present mannequin of the universe by exhibiting that, in reality, it has no room for darkish matter.
In cosmology, the time period “darkish matter” describes all that seems to not work together with gentle or the electromagnetic area, or that may solely be defined by means of gravitational power. We will not see it, nor do we all know what it is fabricated from, nevertheless it helps us perceive how galaxies, planets and stars behave.
Rajendra Gupta, a physics professor on the School of Science, used a mix of the covarying coupling constants (CCC) and “drained gentle” (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 gentle dropping power when it travels a protracted distance. It has been examined and has been proven to match up with a number of observations, resembling 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 darkish matter and fewer than 5% of atypical matter, remaining being the darkish power.
Difficult the necessity for darkish matter within the universe
“The examine’s findings verify 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 customary cosmology, the accelerated growth of the universe is claimed to be brought on by darkish power however is in reality as a result of weakening forces of nature because it expands, not attributable to darkish power.”
“Redshifts” confer with when gentle 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 information, that eliminates its cosmological existence whereas being in keeping with key cosmological observations that we’ve got 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 info:
Rajendra P. Gupta, Testing CCC+TL Cosmology with Noticed Baryon Acoustic Oscillation Options, The Astrophysical Journal (2024). DOI: 10.3847/1538-4357/ad1bc6
Journal info:
Astrophysical Journal