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Why is this torn-apart star so dim in radio and X-rays?

Tatsuya Matsumoto, Tsvi Piran

May 29, 2026

TDE2025aarm, a star shredded by a supermassive black hole, emits far less radio and X-ray light than typical tidal disruption events. Standard models predict bright synchrotron emission from disk winds, but the observed weakness suggests a narrowly beamed outflow from unbound stellar debris instead. Shock acceleration of relativistic electrons can explain the faint X-rays through synchrotron and inverse-Compton mechanisms, offering a new window into how debris flows escape and radiate near black holes.
Published as On the Faint Early-time Radio and X-ray Emissions in TDE2025aarm arXiv:2606.00209
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