Scientists Finally Solve the Mystery of Strange Signals Coming From Space

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Astronomers trace bizarre repeating radio signals to a white dwarf binary system, revealing a cosmic breakthrough.

The Signals Are Called Long-Period Radio Transients

The Source Is ASKAP J174508.9−505149

A White Dwarf Is Pulling Matter From a Companion

The System Is a Cataclysmic Variable

The Orbit Takes About 1.3 Hours

The System Produces Both Radio Bursts and X-Rays

The Radio Bursts Are Polarised

Older Theories Focused on Magnetars

This Does Not Explain Every Strange Signal

The Breakthrough Gives Astronomers a New Decoder

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For years, astronomers have been trying to explain a strange class of repeating radio signals that behave unlike ordinary cosmic flashes. They last too long, repeat too slowly, and do not fit neatly into the usual models built around pulsars or magnetars.

Now, a new study has traced one of these signals to a “cannibal” star system called ASKAP J174508.9−505149. The source is not one lonely object, but a white dwarf pulling material from a companion star, producing repeated radio bursts and X-ray emission as the two stars orbit each other.

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