NASA scientists believed that they have found the mysterious dark matter which constitutes more than 85% of our universe. NASA’s Fermi Gamma Ray telescope found a signal that originating from the Andromeda galaxy. The scientists have detected the presence of Gamma Ray at the centre of the galaxy and that same signal was once detected at the centre of Milky Way in 2014.
Gamma Rays are the highest-energy form of light which is produced by the universe’s most energetic phenomena. These are common in galaxies as cosmic rays, particles moving near the speed of light and produce gamma rays when they interact with interstellar gas clouds.
Scientists are surprised to see that the Fermi data shows the gamma rays in Andromeda which also known as M31 are confined to the centre instead of spread all through.
Scientists explained that the emission may come from several undetermined sources, one of them could be dark matter.
Astrophysicist at the National Centre for Scientific Research and the Research Institute in Astrophysics and Planetology in France, Pierrick Martin said, “We expect dark matter to accumulate in the innermost regions of the Milky Way and other galaxies, which is why finding such a compact signal is very exciting.”
He added, “M31 will be a key to understanding what this means for both Andromeda and the Milky Way.”
The scientists are now carrying out more tests to identify if the source of the signal is actually the dark matter or pulsars. Pulsars are rapidly spinning neutron stars that are extremely massive, as much as the twice the mass of the sun. A single teaspoon of a pulsar could weigh a billion tons of Earth.
An astrophysicist at Chinese Academy of Sciences, Xian Hou said, “We don’t fully understand the roles cosmic rays play in galaxies, or how they travel through them.”
Hou stated, “M31 lets us see how cosmic rays behave under conditions different from those in our own galaxy.”
NASA scientists said they need more analysis to solve the mystery of dark matter.
The Fermi Gamma Ray telescope was launched on June 11, 2008. The terrorists have been helping the scientists in studying astrophysical and cosmological phenomena like galactic nuclei, pulsars, other high-energy sources and dark matter.