Scientists have proven that stars can be ejected outside the galaxy, although it was previously thought that they do not change their orbits.A new study has found that supernova clusters can cause the birth of scattered stars orbiting the outer stellar halos of galaxies.A new study has found that supernova clusters can cause the birth of scattered stars orbiting the outer stellar halos of galaxies.The galaxy's star halo extends far from the brightest areas and contains the oldest stars.The outer halo of the Milky Way also contains most of the mass of the galaxy.The new discovery challenges the common notion of how stellar systems have formed and evolved over billions of years.With the help of the project "Feedback in Realistic Environments 2" (FIRE-2), astronomers want to find out how the stars formed in the galactic halo of the Milky Way. Using "hyperrealistic" computer models from the project, astronomers at the University of California, Irvine (UCI) modeled disturbances in galactic revolutions that would otherwise be considered ordered.
According to the simulation results, the Milky Way pushed the stars out due to powerful explosions of supernovae. This is of great interest to scientists, because when several large stars die, the resulting energy can displace the gas from the galaxy, which, in turn, cools and becomes the reason for the birth of new stars.According to the authors of the study, published in the journal Monthly Notices of the Royal Astronomical Society, the distribution of stars extends beyond the classical disk of the galaxy.In the past, astronomers have suggested that galaxies form over a long period of time.
It was believed that smaller groups of stars would enter the galaxy and be destroyed by it. This could throw some of these stars into more distant orbits. But researchers at UCI believe that this so-called "supernova feedback" may actually be the source of up to 40% of stars with an external halo.