This glow is called the Galactic Center GeV Excess (GCE), and astronomers have been trying to detect it for years. One hotly debated explanation is that glare can theoretically arise from the destruction of dark matter – but new research is a nail in the coffin of that idea.
In a series of exhaust models, including recent developments in simulating galactic protrusion and other sources of gamma-ray emission, a team of astrophysicists has ruled out the deletion of dark matter as a source of brightness.
This discovery, the team says, gives dark matter Less space to hide – Strong inhibition on its properties which can aid in future discoveries.
“The leading candidate for dark matter among particle physicists for 40 years or more was a thermal, weakly interacting, and weak-scale particle,” said astrophysicist Kevor Abajajian of the University of California Irvine (UCI).
“This result depends on the first time that the candidate has particles with very high mass.”
The GCE was first observed more than a decade ago, when the Fermi Gamma-Ray Space Telescope began surveying the region. Gamma rays are the most high-energy electromagnetic waves in the universe, and they collide with the most intense objects, such as millisecond pulsars, neutron stars, neutron stars, black holes, and supernovas.
The problem was, when it came time to analyze Faraimi’s observations, after subtracting all known gamma-ray sources, we ended up with a gamma-ray glow in the heart of the Milky Way that no one accounts for. could go.
In space, when you find something that cannot be accounted for, it means trying to mix it with other things that make no sense – like Dark Matter. This is the name we give to the invisible mass that adds gravity to the universe.
We can detect Dark Matter indirectly, because things move differently if they are only having an effect on the visible stuff, but we have no idea what exactly it is.
However, when we cannot directly detect dark matter, it is possible that it produces radiation that we can see.
If some type of dark matter particles were called weakly intermittent particles, or WIMPs, they collided with each other – like collisions in particle accelerators – they would annihilate each other, bombarding other particles, including gamma-ray photons. Explosion in. Such collisions have been put forward as a possible mechanism producing GCE.
In many studies, however, no evidence of WIMP collisions has been found, but this new paper is a step forward, the authors say.
“In many models, this particle is from 10 to 1,000 times the mass of a proton, with mass particles less attractive as a dark mantle particle,” said UCI astronomer Manoj Kaplingghat.
“In this paper, we are eliminating the Dark Matter candidates on the favorite range candidates, which we are putting huge hurdles on the prospects that are representative of these Dark Matter.”
Over three years, the team drew together a wide range of gamma-ray modeling scenarios for the galactic center and its bulge – a tightly filled cluster of wires centered around the center. They included all the sources in which they could get their hands on – star formation, Fermi bubbles, cosmic rays with molecular gas and neutron stars and millisecond pulsars.
They found that once they had recovered everything, there was little room for the WIMP apocalypse. Among all these gamma-ray sources, “there are no significant additions to the GC that can be attributed to the destruction of DM,” the researchers write in their paper.
Previous research has found that the distribution of gamma-rays in the galactic center is also inconsistent with the destruction of dark matter. If WIMPs were the culprit, the distribution would be smooth – but instead, gamma-ray photons are distributed in clamps, as you’d expect from point sources to find like stars.
According to new research, the distribution of stars in the bulge is also inconsistent with the presence of excess dark matter.
This is not to say that the dark matter in our galactic center cannot be of some imaginary, large-scale, weakly interactive type. The team has only given verdicts about those that are commonly searched, and then some. The team notes that their findings still favor an astrological origin for GCE.
“Our study lacks the kind of particle that can cause dark matter,” Kaplingghat said. “Many lines of evidence for dark matter in the galaxy are strong and unaffected by our work.”
Which means we are going to think far outside the box to find it.
The research has been published in Physical Review D.