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Micro-Quasars Unveiled as Cosmic Ray Knee Sources

11/19/2025

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Story summary
  • Large High Altitude Air Shower Observatory (LHAASO) identifies micro-quasars as sources of the cosmic ray knee.
  • Micro-quasars are black hole systems formed when black holes accrete material from companion stars and act as powerful particle accelerators in the Milky Way.
  • LHAASO detected ultra-high-energy gamma rays from five micro-quasars, including SS 433 and V4641 Sgr.
  • The findings link the cosmic ray knee to black hole jet systems, reshaping views on origins.