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A new study has revealed that 13 hypervelocity stars that have been discovered may be foreign in nature, having traveled to the Milky Way from other galaxies. The hypervelocity stars, which are the fastest stars in our galaxy and move hundreds of millions of kilometers an hour, are not gravitationally linked to the Milky Way and do not gravitate around the center of our galaxy like the make the sun. Some of these stars have not only left the Milky Way and are moving towards the intergalactic space, but some of them have also left other galaxies and end up in ours, as shown by new research.
according to Science live, a new study by astronomers from the University of Leiden in the Netherlands has identified 13 hypervelocity stars that, in the opinion of the researchers, are probably extraterrestrial stars and not our galaxy, because to find them on the Milky Way were an impossible task. So, instead of trying to escape from our galaxy, these stars may actually have escaped others to enter ours, sneak up.
"Rather than fleeing the galactic center, most of the high-velocity stars we've seen seem to be rushing toward him. It could be acting from stars of another galaxy, traveling the Milky Way, "said astronomer Tommaso Marchetti of the University of Leiden.
13 Hyperfast, aliens invade the Milky Way https://t.co/FImT4r1bN4 pic.twitter.com/WquOI8qlCu
– Science Live (@LiveScience) October 4, 2018
Marchetti and other researchers discovered these 13 extra-terrestrial stars after sifting through the Gaia satellite data from the European Space Agency and used the speed and position data of 7 million. stars of the Milky Way. After looking for the stars that were moving the fastest, they noticed that there were 20 undocumented stars.
It was discovered that seven of these stars were "hyper-runners" from the galactic disk of the Milky Way and were now rapidly moving toward the intergalactic space. However, the remaining 13 hypervelocity stars were moving along a trajectory that demonstrated that they were very unlikely to come from the galactic disk of the Milky Way. The researchers think rather that it 's about extraterrestrial stars from a nearby galaxy, like the Great Magellanic Cloud, which eventually ended up here.
Elena Rossi, co-author of the new study, noted that while researchers are not yet sure how these 13 stars ended up coming out of their orbit, "their study could say more about this type of process. in neighboring galaxies. "
The new study that determined that 13 hypervelocity stars in the Milky Way are most likely extraterrestrial stars from neighboring galaxies was published in the Monthly Notices from the Royal Astronomical Society.
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