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Astronomers discover a new type of star covered in the ashes of burning helium

Wednesday 16 February 2022 01:15 AM

Discover Astronomy scientists A new type of strange star covered in burning helium ash, which they say likely formed due to a rare stellar fusion event, and came to this when searching for “hot stars” using the Large Telescope in Arizona, where a German team of experts came across two stars with the same unusual properties. normal.

According to the British Daily Mail, the stars are called PG1654 + 322 and PG1528 + 025, the stars are located inside our galaxy but are somewhere between 10,000 and 25,000 light-years from Earth.

While the surfaces of ordinary stars are made up of hydrogen and helium, these newly discovered stars are covered in large amounts of carbon and oxygen, the byproduct of helium’s nuclear fusion.

Experts report a surprisingly high abundance of both carbon and oxygen, which each account for about 20% of the surface composition of both stars.

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Usually stars that are covered with this much carbon and oxygen have finished the nuclear fusion reactions that take place within them.

However, the temperatures and diameters of the two newly discovered stars indicate that helium nuclei continue to fuse inside them, an unprecedented finding.

This new type of star is thought to have formed from the merging of two white dwarfs, the hot, dense remnants of long-dead stars.

The research was conducted by a team of astronomers led by Professor Claus Werner of the University of Tübingen, and a new paper is published in the Monthly Notices of the Royal Astronomical Society.

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Source : Technology: Astronomers discover a new type of star covered in the ashes of burning helium