{"data":{"id":1764,"lang":"en","title":"Astronomers Trace a Mysterious Repeating Radio Signal to a White Dwarf Cannibalizing Its Companion Star","summary":"Astronomers traced a mysterious repeating radio signal to a white dwarf stripping gas from a red dwarf companion, emitting radio and X-ray bursts every 1.4 hours.","category":"science","category_label":"Science","published_at":"2026-06-03T10:01:51Z","updated_at":"2026-06-03T10:01:51Z","url":"https://techtools.cz/tools/news/article/1764-astronomers-trace-a-mysterious-repeating-radio-signal-to-a-white-dwarf","api_url":"https://techtools.cz/news-api/v1/articles/1764?lang=en","markdown_url":"https://techtools.cz/news-api/v1/articles/1764.md?lang=en","image_url":"https://www.sciencedaily.com/images/1920/mysterious-cosmic-signal-from-red-white-star-interaction.webp","word_count":172,"reading_time_minutes":1,"sources":[{"url":"https://www.sciencedaily.com/releases/2026/06/260602021631.htm","domain":"sciencedaily.com"},{"url":"https://uncnews.unc.edu/2026/06/02/unc-chapel-hill-astronomers-help-crack-cosmic-radio-mystery/","domain":"uncnews.unc.edu"}],"translation":{"lang":"cs","id":1837,"title":"Astronomové vystopovali záhadný opakující se rádiový signál k bílému trpaslíkovi, který požírá svou hvězdnou družku","url":"https://techtools.cz/tools/news/clanek/1837-astronomove-vystopovali-zahadny-opakujici-se-radiovy-signal-k-bilemu","api_url":"https://techtools.cz/news-api/v1/articles/1837?lang=cs"},"content":"An international team led by University of Sydney PhD student Kovi Rose has identified the source of a long-puzzling class of repeating cosmic radio signals. Using CSIRO's ASKAP radio telescope, the researchers traced the object ASKAP J1745-5051 to a rare stellar pair in which an Earth-sized white dwarf is siphoning material off a nearby red dwarf companion.\n\nAs the stolen gas spirals inward, the two stars' powerful magnetic fields collide and unleash bursts of radio waves and X-rays every 1.4 hours, while the stars themselves orbit each other in just over an hour. It is only the second known long-period radio transient confirmed to also emit regular X-rays, and the first in which scientists have pinned down what drives the rhythm.\n\nAbout a dozen of these slow-pulsing radio sources have been found since 2022, defying easy explanation. The findings, published in Nature Astronomy, offer the strongest evidence yet for their origin. \"These systems are natural laboratories,\" Rose said, allowing scientists to test how matter behaves under intense gravity and powerful magnetic fields."}}