Candidate most massive binary star identified

Astronomers have observed a binary star that potentially weighed 300 to 400 solar masses at birth. The present day total mass of the two stars is between 200 and 300 times that of the Sun, depending on its evolutionary stage, which possibly makes it the most massive binary star known to date. The results of this study, which was led by astronomer Hugues Sana of the University of Amsterdam and bachelor student Tayo van Boeckel, have been published in Monthly Notices of the Royal Astronomical Society Letters.

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