Robert 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.
Densely packed stars and glowing gas in the massive star-forming region NGC346 in the Small Magellanic CloudFor the first time, astronomers have detected the magnetic fields of massive, blazingly hot stars outside our galaxy. They're stars that actually live in our galactic companions, the Large Magellanic Cloud and the Small Magellanic Cloud . Magnetism is a vital factor in the evolution of massive stars, and can also determine how they will end their lives.
To detect the smallest changes in starlight, spectropolarimetry depends on a high level of accuracy in polarization measurements, which requires high-quality data. There are also other challenges associated with performing spectropolarimetry beyond the Milky Way. The magnetic field measured for circular polarization is called a"longitudinal magnetic field," and it points in the direction of the observer. Almost like light from a lighthouse, the beam is easiest to see when pointed directly at an observer, and the longitudinal magnetic field is the easiest component of a magnetic field to see.
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