Antarctic detector captured 13 radio pulses from cosmic rays in ice
Boing Boing • • science
Key Points:
- Neutrinos, particles that travel vast cosmic distances without being absorbed or deflected, require extremely large detectors to be observed due to their elusive nature.
- The Askaryan Radio Array (ARA) uses antennas buried deep in Antarctic ice to detect radio frequency signals generated when high-energy particles interact with the ice, confirming a phenomenon predicted by physicist Gurgen Askaryan in 1962.
- In 2019, ARA recorded 13 radio signals from below the ice that matched the expected characteristics of Askaryan radiation with high statistical confidence, marking the first confirmation of this effect in ice.
- These 13 signals were identified as cosmic rays rather than neutrinos, but the ability to distinguish between them validates the detection method.
- A forthcoming multi-year data release from all five ARA stations is anticipated to include up to seven candidate neutrino events, potentially advancing neutrino astronomy.
