Dark matter, which makes up about 85 per cent of the universe’s total mass, has baffled scientists for years because it does not emit or absorb light. However, almost a century after the theory was proposed, a new study claims it may have found evidence of dark matter’s existence.
For a long time, scientists assumed that there must be a large amount of matter exerting a massive gravitational force. And while we still can’t see it with our eyes or current instruments, a team of physicists has demonstrated a new approach that might finally decode the mystery.
According to Prof Tomonori Totani, an astrophysicist at the University of Tokyo, gamma rays originating from the centre of the Milky Way potentially bear a dark matter signature. “This could be a crucial breakthrough in unravelling the nature of dark matter,” he said.
To search for dark matter signals, Totani says the team used data from NASA’s Fermi Gamma-ray Space Telescope, which can identify photons across the electromagnetic spectrum. When analysing the data, he said the pattern of gamma rays matched the shape of the dark matter halo surrounding the heart of our galaxy.
While dark matter does not produce light, if dark matter particles “annihilate” when colliding with one another — similar to matter and antimatter — they would theoretically produce different particles, including gamma-ray photons.
“If this is correct, to the extent of my knowledge, it would mark the first time humanity has ‘seen’ dark matter. And it turns out that dark matter is a new particle not included in the current Standard Model of particle physics. This signifies a major development in astronomy and physics.”
Story continues below this ad
If Totani has indeed detected dark matter, it could be made of particles at least 500 times more massive than protons. However, his results must still be verified through independent analysis before anything can be confirmed.
Expand
© IE Online Media Services Pvt Ltd
