Strange Signals Called Long-period Radio Transits Come From Cataclysmic Variables
Astronomers have identified the source of mysterious, repeating radio signals known as Long-period Radio Transits (LPTs) as magnetic cataclysmic variables involving white dwarfs. The study, published in Nature Astronomy, explains how these binary systems produce unique radio and X-ray emissions.
Why it matters
Solving the mystery of LPTs advances our understanding of stellar evolution and the complex interactions within binary star systems.
Long period radio transients (LPTs) are mysterious signals coming from objects inside our galaxy. They're highly polarized, coherent radio bursts that repeat regularly, with periods ranging from a few minutes to a few hours. Scientists detected hints of the first LPT in 2005, and now they know of many more of them.
So far, an explanation has lagged behind their detections, but new research has an explanation for at least one of them. The research is titled " Periodic radio and X-ray emission from an accreting white dwarf binary, " and it's published in Nature Astronomy. The lead author is Kovi Rose, a PhD student from the University of Sydney’s School of Physics and CSIRO .
"Little is known about the physical origins of these systems," the authors write. "Astronomers have proposed magnetars that rotate slowly and white dwarfs that rapidly orbit with a companion star as potential explanations."
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