‘Ghost particle’ from ANOTHER GALAXY to spark astronomical breakthrough


Projects such as ARRIANNA and the IceCube Neutrino Observatory at the Amundsen-Scott South Pole Station are now on the look-out for neutrinos and it is the latter that has pinned down the location of a steam of neutrinos pouring out from a blazer; a powerful, energetic jet at the heart of an active galactic nucleus surrounding a supermassive black hole.

Ultimately, the team concluded that there are other blazars out in the space, and these active galaxies are the main sources of high-energy cosmic neutrinos.

Scientists have been in a constant conundrum over the origin of high energy particles from space which pound the Earth at vitality that can overtake the world's most developed particle called the neutrino.

The IceCube collaboration, on September 22, 2017, detected an ultra-high-energy neutrino that arrived at the South Pole and was able to identify its source.

The worldwide concerted effort detected that the neutrino was coming from a galaxy almost 4 billion light-years away - the blazar - that was located in the constellation of Orion.

Wisconsin physicist and ice cube neutrino observatory chief scientist Francis Halzon said that high-energy neutrino is produced by the same source, which is seen in cosmic rays, the highest energy particles are ever seen, but vary in an important honor.As charged particles, cosmic rays can not be seen directly at their source because strong magnetic fields in space change their trajectory. Because they rarely interact with matter and have almost no mass - they are sometimes called "ghost particles" - neutrinos travel nearly undisturbed from their accelerators, giving scientists an almost direct location of their source.

Encompassing a cubic kilometer of deep, pristine ice a mile beneath the surface at the South Pole, the detector is composed of over 5,000 light sensors in a grid.

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Cosmic neutrinos come from high-energy sources, like hot stars or supernovas.

Neutrinos are created by radioactive decay in stars, during supernovae, or as matter spirals into a black hole.

Washington, Jul 13 (Prensa Latina) An worldwide team of scientists found for the first time the origin of a neutrino from outside the Milky Way, a ghost particle that marks the beginning of a cosmic ray source, the journal Science published today. It had an energy of 300 trillion electron volts. If that jet happens to be pointed toward Earth, the light from the jet outshines all other emission from the host galaxy and the highly accelerated particles are launched toward the Milky Way.

When a neutrino interacts with the nucleus of an atom, it creates a secondary charged particle, which produces a cone of blue light that can be detected.

Following the IceCube detection, astronomers looked at TXS 0506+056 with numerous telescopes and found that it had brightened at wavelengths including gamma rays, X-rays, and visible light.

However, the astrophysical community has since acquired the tools necessary to detect ghost particles with increased accuracy and track them back to their source. This is farther than any other neutrino whose origin scientists can identify.

After this latest observation, the IceCube team went back through archival data and found more than a dozen neutrino detections in 2014 and 2015 that also point to the same blazar. Astrophysicists have long suspected that these jets generate a substantial proportion of cosmic particle radiation. A string of early observations came up blank, but days later Nasa's Fermi Gamma-ray Space Telescope spotted the likely source: a flaring "blazar". The likelihood of this excess being a mere statistical outlier is estimated at 1 in 5000, "a number that makes you prick up your ears", says Christopher Wiebusch from RWTH Aachen, whose group had already noted the hint of excess neutrinos from the direction of TXS 0506+056 in an earlier analysis.