High-speed stars in Milky Way
Astronomers call it "Hyperblocity Stars," the fastest-moving stars in our galaxy.
Because of their super velocity, these stars are released from the gravitational bonds that are supposed to force them to rotate around the center of the galaxy, as our sun revolves.
These stars show that they are moving at high speed, burning in an endless way out of our galaxy, some of which may end up moving aimlessly or in space, while others may enter one of the distant galaxies to settle and orbit, and may remain part of them space swimming here and there.
A study published in the monthly Monthly Notices of the Royal Astronomical Society shows that astronomers at Leiden University in the Netherlands watched 13 superfast stars whose presence could not be attributed to any part of our galaxy.
Instead of these stars coming out of our galaxy, they seem to prefer to be there.
"Instead of flying away from the center of the galaxy, most of the fast stars we've tracked seem to be heading toward the center," says Thomasomarkiti, a contributor to the previous study.
The source of these stars could be other galaxies, heading directly to the center of the Milky Way. "
Marchetti and his colleagues identified these non-Milky Way parasites by analyzing data on speeds and locations of more than 7 million stars in the Milky Way. These data were taken from the European Space Agency's Geophysical Observatory.
During a survey of the sky to access information about the fastest stars in the galaxy, the researchers found nearly 20 unexplored stars, which may be traveling in the galaxy free of the center's magnetism.
Seven of the stars showed their escape from the galaxy, accelerating outward toward the intergalactic space.
The 13 stars appear to be moving in a path that makes them far from the possibility of their origins in the Milky Way galaxy.
"Often, this group of alien stars originated in a galaxy close to our galaxy, like the Magellanic Cloud - a small galaxy of the Milky Way galaxy - about 1 percent the size of our galaxy - and somehow this group took a course in our galaxy," the researchers conclude. .
Both groups represent the fastest stars we have ever known in our galaxy, moving at speeds greater than hundreds of millions of miles per hour.
To bring the example closer to understanding, the earth's orbit speed around the sun is about half a million miles per hour.
How can a star come out of orbit at that speed?
Astronomers believe it is a cause of binary star systems (that is, two stars revolve around one focal point).
The previous point explains that if an accident occurs to one of the two stars, such as a black hole, or the end of its life cycle, the disturbance in the gravitational force generated by the event would be sufficient to release the other star off its path.
"In any case, studying these stars may give us more information about nearby galaxies, and the processes in which they occur," says Rossi, one of the researchers.
By 2017, astronomers have discovered only twenty supermodels, but their theoretical models confirm there are about 10,000 of them swimming around our galaxy. This study gives us recent evidence that other galaxies are not as far away as we imagine.
Through these space messages, we can learn little about our neighbors in galaxies as well!
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