It’s been just revealed that there’s a main-sequence hypervelocity star that’s traveling at enormous speeds after it has been ejected by the Sagittarius A* – the giant black hole from our Milky Way galaxy.
A team of international astronomers has spotted the star.
It’s important to note that hypervelocity stars are moving extremely fast – they have more than twice the speed of other stars: more than 1 million mph.
It’s been revealed by the latest reports coming from Sci-News that astronomers had spotted these stars back in 2005, and since then, about 30 HVSs have been discovered.
The online publication mentioned above reveals that the newly discovered star is hurtling at about 2.3 million mph, and it’s been said that it is moving so fast that it will be leaving the Milky Way and head into the intergalactic space.
Named S5-HVS1, this star is located in the constellation of Grus – this is at a distance of about 29,000 light-years. This is its current location.
“S5-HVS1’s velocity is so high that it will inevitably leave the Galaxy and never return,” according to Dr. Douglas Boubert, an astronomer at the University of Oxford.
The online publication mentioned above notes that “S5-HVS1 was kicked away from Sagittarius A* with a velocity of 4 million mph (1,800 km/s) and traveled for 4.8 million years to its current location.”
The star was ejected by the black hole via the Hills mechanism
The article continues and quotes Dr. Sergey Koposov, a researcher at Carnegie Mellon University:
“This is super exciting, as we have long suspected that black holes can eject stars with very high velocities.”
He reportedly continued and explained that “However, we never had an unambiguous association of such a fast star with the Galactic center.”
Just in case you’re not aware of this, it seems that hypervelocity stars can be ejected by black holes via a mechanism called the Hills mechanism.
You can learn more about this in the original article.