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Young stars spotted nestled closely together

12 Mar 2019, 09:44 UTC
Young stars spotted nestled closely together
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Binary star formation through disk fragmentation starts with a young star surrounded by a rotating disk of gas and dust. Image credit: B. Saxton/NRAO/AUI/NSF
Astronomers have discovered a binary star system with the closest high-mass young stellar objects ever measured, providing a valuable “laboratory” to test theories on high mass binary star formation.
An international team led by the University of Leeds, in the United Kingdom. has determined the distance between the massive young star PDS 27 and its orbiting stellar companion to be just 30 astronomical units (AU) away, or 4.5 billion kilometres (2.8 billion miles).
That is roughly the distance between our Sun and Neptune, making them the stellar companions with the closest proximity ever determined for young high mass stars in a binary system – a star system with two stars in orbit around a centre of mass.
Study lead author, Dr Evgenia Koumpia, from the School of Physics and Astronomy at Leeds, says: “This is a very exciting discovery, observing and simulating massive binaries at the early stages of their formation is one of the main struggles of modern astronomy.
“With PDS 27 and its companion we have now found the closest, most massive young stellar ...

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