UT: Evidence is Building that Dark Matter is Made of Axions

Find out the latest thinking about our universe.
User avatar
bystander
Apathetic Retiree
Posts: 21584
Joined: Mon Aug 28, 2006 2:06 pm
Location: Oklahoma

UT: Evidence is Building that Dark Matter is Made of Axions

Post by bystander » Thu Jun 22, 2023 4:50 pm

Evidence is Building that Dark Matter is Made of Axions
Universe Today | Carolyn Collins Petersen | 2023 Jun 19
There’s some potentially big news on the hunt for dark matter. Astronomers may have a handle on what makes this mysterious cosmic stuff: strange particles called “axions.”

Rather than search directly for axions, however, a multinational team of researchers led by Keir Rogers from the University of Toronto looked for something else. They focused on the “clumpiness” of the Universe and found that cosmic matter is more evenly distributed than expected.

So, what role do axions play here? Quantum mechanics explains these ultra-light particles as “fuzzy” because they exhibit wave-like behavior. It turns out their wavelengths can be bigger than entire galaxies. Apparently, that fuzziness plays a role in smoothing out the Universe by influencing the formation and distribution of dark matter. If that’s true, then it goes a long way toward explaining why the matter in the cosmos is more evenly spread out. It implies that axions play a part in the distribution of matter in the cosmos.

It’s an interesting idea, and a big step forward if the team can test their theory through other means. “If confirmed with future telescope observations and lab experiments, finding axion dark matter would be one of the most significant discoveries of this century,” said Rogers. “At the same time, our results suggest an explanation for why the Universe is less clumpy than we thought, an observation that has become increasingly clear over the last decade or so, and currently leaves our theory of the Universe uncertain.” ...

Astronomers Discover New Link between
Dark Matter and 'Clumpiness' of the Universe

University of Toronto | 2023 Jun 14

Ultra-light axions and the S8 tension: Joint constraints from
the cosmic microwave background and galaxy clustering
~ Keir K. Rogers et al
Know the quiet place within your heart and touch the rainbow of possibility; be
alive to the gentle breeze of communication, and please stop being such a jerk.
— Garrison Keillor

saturno2
Commander
Posts: 759
Joined: Wed Jun 29, 2011 10:05 pm

Re: UT: Evidence is Building that Dark Matter is Made of Axions

Post by saturno2 » Fri Sep 29, 2023 4:31 am

Very interesting