The true identity of a star that has baffled astronomers for more than 100 years has finally come to light.
How they get that way is unknown; models suggest that one way could be if the star already had the magnetic field prior to supernova and core collapse. The problem with this is that no detections had been made of a star at the end of its life with a magnetic field powerful enough.
This brings us back to HD 45166. Previous measurements of the binary had found the Wolf-Rayet star was rich in helium, around 4 times the mass of the Sun, and on a tight, 1.6-day orbit with a So, Shenar and his colleagues took a new set of observations of the star, looking for evidence of a magnetic field. They found it, along with a new set of measurements that almost completely recharacterized the binary.– that's the most powerful magnetic field ever recorded in a massive star.Finally, the orbital period of the binary is a much larger 8,200 days, give or take. The 1.6-day periodicity previously detected is the result of internal oscillations in the B-type companion star.
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The powerful winds of super magnetic stars could destroy the possibility for life on their exoplanetsRobert Lea is a science journalist in the U.K. whose articles have been published in Physics World, New Scientist, Astronomy Magazine, All About Space, Newsweek and ZME Science. He also writes about science communication for Elsevier and the European Journal of Physics. Rob holds a bachelor of science degree in physics and astronomy from the U.K.’s Open University. Follow him on Twitter sciencef1rst.
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