1,700 km per second. This is the speed at which the adventurous star, spotted by a team of Australian astrophysicists, was expelled from the supermassive black hole of the Milky Way.
This expulsion mechanism was theoretically identified thirty years ago by astronomer Jack G. Hills, but this is the first time that such an event has been recorded, the Guardian reports. .
Called S5-HVS1, this star was 5 million years ago on a binary star system – two stars orbiting the ordinary center of gravity – that landed very close to Sagittarius A, the black hole of the 4 million solar masses that rule our heart. Galaxy. The two stars spiraled inward, closer to the two, eventually swallowed by the black hole, with the other ejected at a rapid rate.
She is the third fastest star whose speed has never been measured. The other two were propelled by supernova explosions, the moment when, after exhausting all their energy, a star collapsed under the influence of its own gravitational forces, causing a giant explosion.
This star moves at such a rate (ten times faster than most stars of the Milky Way) that it will exit the Milky Way in a hundred years before traveling alone across the intergalactic space. According to Australian National University (ANU) astronomer Gary Da Costa in Canberra, the S5-HVS1 will continue to function and eventually become a "white dwarf", the extremely dense remnant of a dead star.