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Space
2022-03-10 09:51:12

Astronomers discover vampire star that has stripped its 'partner' of its atmosphere

Астрономы обнаружили звезду-вампир, которая лишила атмосферы своего «партнера»

Back in 2020, astronomers discovered an unusual star system just 1,000 light-years from Earth, dubbed HR 6819. Astronomers captured the binary system just after one of the stars stripped its partner of its atmosphere in a process known as 'stellar vampirism'.

But most black holes are actually silent and therefore very difficult to detect. Astronomers believe that the discovery of HR 6819 in 2020 will provide useful clues as to where at least some of the truly dark black holes may be hiding.

Two teams of astronomers decided to work together, collecting new observational data from the Very Large Telescope and the European Space Observatory's Very Large Telescope Interferometer. The data showed that the two stars were separated by just one-third of the distance between the Earth and the Sun. There was no bright companion star with a wider orbit and no black hole.

"We 'caught' this binary system at a moment shortly after one of the stars sucked the atmosphere from its companion star," said co-author Julia Bodensteiner, an ESO researcher in Germany. Astronomers say this is a common phenomenon in close binary systems, sometimes called "stellar vampirism".

The example of stellar vampirism is an interesting finding in itself, as this phase of stellar evolution is relatively short and therefore very difficult to detect. Further study of HR 6819 could shed light on how stellar vampirism could affect the evolution of massive stars.



космос




Encyclopaedic reference
Космос - относительно пустые участки Вселенной, которые лежат вне границ атмосфер небесных тел.

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