Mysterious, massive, magnetic stars

The pair of stars is about 500 light-years away, are both blue in colour, each has between seven and eight times the mas of the Sun, and combined together the pair is around 6,000 times as luminous as the Sun. Astronomers have known for many years that Epsilon Lupi is a binary system, but they had no idea that the two giant stars had magnetic fields. 

“ The origin of magnetism amongst massive stars is something of a mystery , and this discovery might help to shed some light on the question of why any of these stars have magnetic fields”