Yes, you read the title correctly. Scientists have proven that stars can be thrown out of the galaxy, although previously it was believed that they practically do not change their orbits. In a new study, it turned out that supernova clusters can cause the birth of scattered, rotating stars in the outer stellar halos of galaxies. The starry halo of the galaxy 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 conventional wisdom about how star systems were formed and developed over billions of years.
How are stars formed?
Inside each star is a naturala fusion reactor that synthesizes heavier elements from light elements. So helium is formed from hydrogen, carbon from the gel, etc. Scientists are aware of this, thanks to the ghostly particles - neutrinos, which are fixed by neutrino detectors installed in the bowels of the Earth. Today we also know how life and death of most stars go - the brighter they shine, the faster they burn nuclear fuel.
Stars like our sun live around 10billions of years, but stars 10 times more massive than yellow dwarfs completely burn out in just 25 million years. At the same time, stars should be much smaller than the Sun to live on the order of 100 billion years (just think about these numbers), which is much more than the age of our universe. When the star’s life cycle comes to an end, the stars drop the upper layer of matter - this is how massive stars become supernovae, and not massive stars, slowly enveloping a planetary nebula.
See also: Black holes can interfere with star formation in dwarf galaxies
However, whatever the star, ultimatelyit leaves an expanding gas cloud and either a neutron star or a black hole, or a dense small object - a white dwarf. Of course, each star is unique, but the general course of life and the evolution of stars can be traced using computer models. Read more about the latest astronomical discoveries on our channel in Google News
Milky Way Center
With the help of the project “Feedback in realisticenvironments 2 ”(FIRE-2), astronomers want to find out how stars formed in the galactic halo of the Milky Way. Using "hyper-realistic" computer models from a project, astronomers from the University of California, Irvine (UCI) simulated disturbances in galactic rotations that would otherwise be considered ordered.
FIRE 2 allows astronomers to create films that look like you are watching a real galaxy.
According to the simulation results, the Milky Waypushed out stars due to powerful explosions of supernova stars. This is of great interest to scientists because when several large stars die, the resulting energy can displace gas from the galaxy, which, in turn, cools and causes the birth of new stars. According to the authors of a 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 galaxiesform over a long period of time. It was believed that smaller groups of stars will enter the galaxy and be destroyed by it. This could throw some of these stars into more distant orbits. But UCI researchers believe that this so-called “supernova feedback” can actually be the source of up to 40% of stars with an external halo.
As the center of the galaxy rotates,a bubble controlled by feedback from a supernova, and stars form on its edge. It looks like the stars are throwing out of the center. According to CNN, the researchers said that there is a “fair amount” of observational data indicating that stars form in this way.
Milky Way Halo - it's a kind of recordings of different periodsthe existence of the galaxy and with the help of the new project FIRE-2, researchers were able to see what is happening with their own eyes. When supernovae explode, a huge release of energy and gas occurs. It is they - in streams - that push individual stars into the halo of the Milky Way. But if all is true, then what about our sun? Fortunately, there is nothing to worry about - the authors of the study told Eurekalert that stars like our Sun are unlikely to be among the streams of gas and energy, since their nuclei are full of metal. Stars with less metal in the core are in danger, so if a supernova explodes near such a star, it cannot be flavored.