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It's a magnetar called XTE J1810-197, and it was discovered in 2003 just riotously spitting out radio waves. In 2008, it just… stopped, and pretty much vanished from our view.Now, scientists have analyzed those radio waves in two separate papers, and the results are wack. Those low frequency electromagnetic emissions are
All stars are special in their own way, but magnetars are possibly the weirdest of the weird. They're very young neutron stars, which themselves are the collapsed cores of dead massive stars that have gone supernova and ejected most of their material in a colossal explosion. The core that remains collapses under gravity, and it is, neutron stars briefly possess an insanely powerful magnetic field.
Normally, magnetars emit mostly linear polarized light, with a small amount of circularly polarized light traveling in a spiral pattern. XTE J1810-197, Lower and his team found, was emitting huge amounts of circularly polarized light. "Our results suggest there is a superheated plasma above the magnetar's magnetic pole, which is acting like a polarizing filter,"Meanwhile, Desvignes and his team found that the polarization revealed a shift in the magnetar's orientation with respect to Earth. In other words, it seemed to be wobbling, or precessing, like a spinning top. But this got surprising, too: over the next few months, the precession damped significantly, and eventually stopped entirely..
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