A white dwarf star, which emerged after a star consumed all the hydrogenated material to fuel its fusion reactions, was launched by the Milky Way at 900,000 kilometers per hour after experiencing a “partial supernova”.
The white magnet in question, nicknamed by SDSS astronomers J1240 + 6710, was originally discovered in 2015 by three scientists, two of them Brazilians, Kepler Oliveira and Gustavo Ourique. It was part of a binary star system – which is 1,430 years old- Earth light. During observations, experts detected an unusual combination of oxygen, non, magnesium and silicon in its atmosphere – unlike the hydrogen and helium normally found.
A few years later, using data captured by NASA’s Hubble Space Telescope, an international team of astronomers discovered that the white magnet also had traces of carbon, sodium and aluminum in its atmosphere – the telltale signs of a supernova.
The white magnet was ejected after a partial supernova. Photograph:ESA / Reproduction
Making things even more unusual, scientists have found no heavier elements, including iron and nickel, which are usually found after a supernova.
This led them to believe that the star just “experienced” a supernova. “This is what makes this white magnet unique, it has undergone nuclear burning, but stopped before completing the process,” said Boris Gnsicke, professor of physics at the University of Warwick, UK.
“She [estrela] It is unique because it has all the characteristics of a white magnet, but it has a very high speed and unusual abundances that do not make sense when combined with its low mass, “said the physicist.
According to the expert, what may have happened is that the system in which the white magnet was found passed through a partial supernova, leaving part of the magnet behind while ejecting the rest through space, like a kind of slingshot.
Such an event would have resulted in a blur of light almost impossible to be detected from Earth. “When the supernova happened, it was probably brief, maybe a few hours,” said Gnsicke. “We are discovering that there are different types of white magnets that survive supernovae under different conditions and, using the mass and velocity compositions they have, we can find out what type of explosion they went through,” he concludes.