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Extremely magnetic, ultra-dense stars It s taken nearly 15 years to begin untangling the mystery of fast radio bursts. Initial hypotheses included evaporating black holes, flaring dead stars, colliding dense objects, and yes, even alien technologies (spoiler: it s not aliens). Further clues, from nano-scale structures within the radio bursts to their millisecond duration and intensity, suggested they must be produced by extremely dense, compact objects. So, scientists turned to objects such as black holes and neutron stars, which are left over when massive stars blow themselves to bits in supernovae. Later, observations suggested that some bursts are born in regions with extreme magnetic fields, further suggesting these mysterious signals could come from magnetars. ....
Mysterious radio burst from space is unusually close and especially baffling A fast radio burst, one of the most perplexing phenomena seen by astronomers, has been detected among a nearby population of ancient stars. ByNadia Drake Email Bright, fleeting blasts of radio waves coming from the vicinity of a nearby galaxy are deepening one of astronomy’s biggest mysteries. The repeating bursts of energy seem to be coming from an ancient group of stars called a globular cluster, which is among the last places astronomers expected to find them. Often originating billions of light-years away, the extremely bright, extremely brief bursts of radio waves known as fast radio bursts, or FRBs, have defied explanation since they were first spotted in 2007. Based on observations to date, scientists surmised that the bursts are powered by young, short-lived cosmic objects called magnetars. ....