Title : Has The Smoking Gun For Dark Matter Been Found?
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Has The Smoking Gun For Dark Matter Been Found?
"Post-body-3922167635412901441"> The search for the mysterious dark matter has so far produced very little results, but scientists could have found evidence of "dark matter annihilation," essentially dark matter particles collide and produce a signal. A US team of astronomers discovered the promising gamma-ray emission from within the halo of the Milky Way.
The source, 3FGL J2212.5 + 070, found that the production of gamma rays through the telescope Fermi NASA . What is unusual, however, is that this source extends over a large region - or in other words, extending spatially. Other gamma ray sources, such as pulsars and black holes are "timely" and come from a place. Found in a subhalo group, a region of the outside of the Milky Way, the source is also detected not other wavelengths, other than gamma rays, which makes it a good candidate for dark matter, a generally invisible substance. The results have been submitted to the Journal of Cosmology and Astroparticle Physics, and are available in arXiv . "Extended objects that emit gamma rays also broadcast on the radio, X-rays, and so on," lead author Dr. Bertoni said Bridget IFLScience. "Therefore, the fact that we found something that emits only gamma was extended rays and had a spectrum that looked like a specter of annihilation dark matter made this source a particularly dark interesting candidate question I subhalo." 
NASA's Fermi telescope, illustrated, was used to make the discovery. NASA / Fermi Dark matter is a mysterious type of matter that pervades the universe. It is six times more abundant than ordinary matter and does not interact with light, hence the nickname "dark". However, we can see the effect of dark matter in the form of galaxies and how they are distributed in space. Dark matter is thought to accumulate in the centers of galaxies, several searches have been conducted so look for signs of the core of the Milky Way. However, although some potential signals have been detected, there is a much debate about the nature of these sources. "We followed another way to find this dark matter annihilation, complementary to the searches in the galactic center," said Dr. Bertoni. "We are studying sub-halos of dark matter. These are small groups bound dark matter found in the Milky Way. It is predicted that there must be many small clumps of dark matter around galaxies like the Milky milk ". Astronomers believe dark matter could be made by massive particles of weak interaction ( WIMP ). When these particles collide, they are expected to emit gamma -. The signal which could be observed by gamma-ray telescopes such as Fermi telescope While the source is very promising, researchers have discussed the possibility that the detection is not a single extended subhalo , but two gamma sources nearby. The model suggests that there is a 2 percent chance that there would be a couple like this somewhere in the sky. The probability is small, but not zero, and more observations are needed to confirm their true nature. "It would be nice to have other follow-up [observations] of this object," said Dr. Bertoni. "What is needed are the observations with high angular resolution to distinguish whether it is two objects or object. In addition, to continue the search for pulsations gamma rays from this object would also be useful." (source)
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