Dark matter makes up about 80 percent of all matter in the Universe.
Astrophysics Stockholm University have narrowed it down mystery dark matter particles called axions light, the characteristics of which are not exactly known scientists and can vary. The researchers were able to exclude several options axonopathy particles, leaving the most plausible of them. The results were published in the journal Physical Review Letters.
Dark matter makes up about 80 percent of all matter in the Universe. Scientists are still scratching their heads over what it might represent. Candidates for dark matter are both long-known objects, like neutron stars and black holes and exotic particles, e.g. axions — very light particles, which weigh less than a millionth the mass of the electron. However, unlike black holes, axions are much harder to find.
The researchers used the cosmic gamma-ray telescope Fermi, which rotates at low earth orbit, to explore the Central galaxies in the Perseus cluster — galactic cluster, the remote from Earth of 150 million light years. Scientists have been unable to find any trace of Asciano, however, the sensitivity of the instruments was so high that a certain class of axions, if it exists, should be detected.
Axions cannot be detected directly, but predicted that they can be converted into electromagnetic radiation and back if pass through a strong magnetic field. Astrophysics watched a bright galaxy, trying to find the signs of the transformation of gamma-rays in the axions during their travel through a magnetic field that fills the space between galaxies.
Scientists will continue to look for traces of other options axions, using the Fermi telescope. According to them, the sensitivity of the instrument is sufficient to take the observation, which was previously thought to only be available in forthcoming experiments with new generation equipment.
