U.S. astronomers used AI to analyze stars that they discovered using the Gaia Observatory. It turned out that 250 of them were born outside our galaxy.
Astrophysicists used AI, which discovered 250 new stars in the Milky Way – scientists believe that they were born outside the galaxy. Lina Nesib, a researcher at the California Institute of Technology, named this cluster of Nyx after the Greek goddess of the night. She suggests that these stars are remnants of a dwarf galaxy that later merged with the Milky Way.
To develop AI, Nesib and her team first traced the stars in a simulated galaxy. They designated the stars as being born in the main galaxy or formed as a result of the merger of galaxies. These tags were used to teach the deep learning model to determine where the star was born.
Then they applied this model to data collected by the Gaia satellite, which was launched in 2013 to create a detailed three-dimensional map of about a billion stars.
To verify the foreign origin of the Knicks, the researchers checked whether the model could find other stars born outside the Milky Way. They showed the model of the galaxy Gaia Enceladus, which the Milky Way consumed 6-10 billion years ago. AI discovered these celestial bodies.
Scientists noted that such a cluster could not be detected without AI. They plan to continue research and study another 100 million stars. which the Gaia Observatory will map by 2021. The Nyx Cluster will continue to be explored using powerful ground-based telescopes. Scientists want more information about the chemical composition, masses, and luminosity of stars.