New research from two teams shows that these fleeting blips can be faster and brighter, and come from much further away, than previously thought.
Since the 2000s, 750 confirmed bursts have been found at radio frequencies between 100 megahertz and 8 gigahertz, most of them by the Canadian Hydrogen Intensity Mapping Experiment. They are bright enough to be visible across vast distances, and so far most of them seem to come from other galaxies. Some of those blips repeat themselves; some are one-offs. The leading theory is that they come from rare and extreme objects known as magnetars.
This suggests that the bursts don’t just come from the nearby universe. An international team led by astronomer Ryan Shannon of the Swinburne University of Technology used Australia’s Square Kilometre Array Pathfinder to glimpse this fast radio burst, which originated when the universe was less than half its current age. “That you can have these millisecond signals that—though not perfectly undisturbed—travel 8 billion years just to get to Earth is pretty astounding,” Shannon says.
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