HD 98800 four star system

‘One-of-a-kind’ large triple star system detected

Artist’s interpretation of HD 98800, a four-star system located 150 light-years away in the constellation TW Hydrae. Bin Liu and Alejandro Vigna-Gomez suggest that the more massive third star system TIC 470710327 may have started in a similar configuration — two binary star systems, one of which eventually merged into a larger star. TIC 470710327 is very close to the constellation Cassiopeia. Image credit: NASA/JPL-Caltech/UCLA

A compact, massive triple star system detected by researchers at the University of Copenhagen.

Earlier this year, researchers revealed the discovery of a very compact “one-of-a-kind” system of three stars. A collaboration between two young researchers at the Niels Bohr Institute at the University of Copenhagen is now focusing on how this unusual combination of binary and rotating larger stars forms.

Massive third star formation

A star system consists of a set of binary stars, two stars orbiting each other, and a more massive star orbiting the binary.

“As far as we know, it’s the first ever discovered,” said Alejandro Vigna-Gomez. “We know of many third star systems (triple star systems), but they are usually much less massive. This triplet The massive stars in are very close together – this is a compact system. The orbital period of the binary stars (~1 d) is the same as the orbital period of the Earth’s rotation (1 day). The combined mass of both of them is twelve of our Sun’s mass. times – a fairly large star. The third star is about 16 times the mass of the sun, or even bigger! The inner orbit is circular, and the third star orbits the binary nearly six times a year. Pretty fast, when you Considering their size – unsurprisingly, the system was so bright that they were initially detected as stellar binaries.”

Alejandro Viña Gomez and Liu Bin

Alejandro Vigna-Gomez from Mexico and Bin Liu from China in front of the blackboard in Old Auditorium A, Blegdamsvej. Photo credit: Ola J. Joensen/NBI

Dedication of amateurs leads to discovery of star system

The initial discovery of the unusual properties of this highly exotic system is equally remarkable as it was discovered by amateur astronomers.

A group of amateur astronomers is combing through

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