Fastest star is discovered in the Milky. 1200 kilometers per second star in the constellation Ursa Major is on the way. It was discovered ten years ago, he could be measured only now.

An international research team is the fastest star came the Milky Way on the track. The approximately 27,000 light-years away in the constellation Ursa Major Raser is 4,320,000 hours kilometers on the road – these are 1200 kilometers per second, as the University of Erlangen-Nuremberg (FAU) announced on Friday.

The inconspicuous star US 708 is so fast that he will leave the Milky Way. An important role in the life of the unusual record holder played a supernova explosion, as the researchers in the scientific journal “Sciene” reported.

Measured the exact speed of the discovered ten years ago-speed engine of scientists led by Stephan Geier by the European Southern Observatory (ESO) in which Dr.-Karl-Remeis Observatory FAU and the Netherlands, the UK, the US and China.

According to FAU astronomers know currently under the 100 billion stars of the Milky Way just two dozen similar rapid star – but as soon as US 708 is not one of them. Usually, there occur the stellar speedster when a binary star approaches the supermassive black hole at the center of the Milky Way and is torn here. One of the star falls into the black hole, the companion star is catapulted out of the galaxy and so on high speed rating.

Unlike in the case of US 708. For Geier and his fellow researchers were able to reconstruct the trajectory. This revealed that the Temporekordler can not come from the center of the Milky Way and therefore eliminated the black hole there as a catapult. Brain researchers were also on that US 708 consists differently than other high speed star of helium. Helium stars are loud FAU extremely rare, old star of only half of the mass of our sun.

The answer to the riddle closer the researchers came with the discovery that US 708 much faster rotates about its axis than any other known helium star. This points after FAU information out that he once had a very close double star partner whose tidal forces have raised him like a spinning top. The double partner must therefore have been a white dwarf, a very compact star of the size of Earth.

Explosion in front of around 14 million years ago

US 708 and its binary partner finally came closer and closer. In this case, the white dwarf snatched his partner as much of its case that the helium nucleus was visible and flowed in the wake of helium US 708 to the white dwarf. Before the white dwarf swallowed complete its companion star, the dwarf star exploded and was completely destroyed in this so-called thermonuclear supernova. This explosion has occurred before 14 million years.

With the explosion of the white dwarf one fell swoop and its appeal to US 708 away. This retained its already been immense speed and was the supernova actually accelerated somewhat. Since then, he is the fastest star of the Milky way.