A team of astronomers from Harvard University have discovered a superfast cluster of stars, including a record star with a speed of 8,226,967 km/h.
Astronomers have discovered the fastest star ever seen in the Milky Way. It was launched at incredible speed from a giant explosion. A white dwarf named J0927 through space in 8. 226. 967 km/h. Called super fast star because the star’s speed will one day allow it to completely escape the gravity of the Milky Way, J0927 flies with three other fast stars. Ϲthey are supposed to the result of a Type Ia supernova explosion., one of the most violent explosions in the universe. A research team led by Kareem Al-Badry at the Harvard Center for Astrophysics – Smithsonian announced the discovery on the arXiv data site, Live Science On June 15, it was reported.
Simulation of a white dwarf from a supernova explosion.
Simulation of a white dwarf from a supernova explosion. (Photo: Mark Garlick/Science Photo Library).
Type Ia supernova explosion occurs when two stars fall into orbits that revolve around each other, one of which is a white dwarf. The process that causes a white dwarf to extract hydrogen from the star it orbits creates a reaction that leads to a massive thermonuclear explosion. But a simple stellar explosion is not enough for the star to spring up at this speed. Astronomers suspect the supernova is caused by a special form of Type Ia supernova called supernova D6.
In the D6 supernova, two white dwarfs orbit each other, a star carrying away the helium remaining on the surface of the star of the same system. This process generates a lot of energy on the surface of the white dwarf “eat meat” to the point of triggering a fusion reaction again, sending shock waves deep into the core causing the star to explode.
Although such powerful supernova explosions abound, it is difficult to find evidence of these and the ejected white dwarf. To find candidates, Al-Badry and his team delved into the Gaia Star Catalog, a project to create the most detailed star map of the Milky Way. Using data from Gaia, the team discovered white dwarfs. By taking a closer look at their chemical composition (mostly oxygen and carbon), they confirmed that the runaway white dwarf was the result of an explosion that had caused them to lose helium and hydrogen.
White dwarf measurements revealed J0927 to be the fastest escaping white dwarf ever observed in the Milky Way, beating the previous record of 7,919,904 km/h held by star D6-1. The team estimates that the Ɗ6 supernova could represent half of the Ɩa type supernovae. But to be sure, they’ll have to find more runaway stars flying through space.
Article source: VnExpress
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A team of astronomers from Harvard University have discovered a super-fast-flying cluster of stars, including a record-breaking star with a speed of 8,226,967 km/h.