“Ghost” particle from a destroyed star | Digital Trends Spanish
Scientists from New York University and the DESY research center in Germany detected the presence of a high-energy neutrino, also known as an extremely small ghost particle.
According to the researchers, it would have originated after the destruction of a star consumed by a black hole in an event that received the name AT2019dsg, which occurred at a distance of 750 million light years.
This small particle could bring us closer to figuring out where the most energetic particles in the universe are born, as well as showing that tidal disruption events from black holes can produce powerful natural accelerators, according to the authors.
“The origin of high-energy cosmic neutrinos is unknown, mainly because they are notoriously difficult to pin down,” explains astrophysicist Sjoert van Velzen of the University of Leiden in the Netherlands.
“This result would be only the second time that high-energy neutrinos have been traced to their source.”
This recently detected neutrino is the first particle that could be traced to a massive cosmic event, such as the destruction of a star by a black hole.
They are called ghost particles because, for now, their origin is not known. In addition, they do not have an electrical charge, they do not interact with normal matter, they travel practically at the speed of light and they have very small masses.
“Without detection of the tidal disruption event, the neutrino would be just one of many. And without the neutrino, observing the tidal disruption event would be just one of many, ”explains astrophysicist Marek Kowalski from DESY and Humboldt University in Germany.