Fluorescence telescopes observe the predicted ultrahigh-energy cutoff of the cosmic-ray spectrum

• Autores: Bertram M. Schwarzschild
• Localización: Physics today, ISSN 0031-9228, Vol. 60, Nº. 5, 2007, pág. 17
• Idioma: inglés
• Texto completo no disponible (Saber más ...)
• Resumen

  • When a cosmic-rayproton has as much kinetic energy as a well-hit tennis ball, it can create pions and thus lose energy in intergalactic space simply by plowing through the cosmic microwave background.