Carl Stoermer pioneered the use of rigidity cutoffs in determining what amount of these particlespenetrate the Earth's atmosphere.
Carl Stoermer pioneered the use of rigidity cutoffs in determining what amount of these particlespenetrate the Earth's atmosphere. Above a certain energy, these particles cannot travel further than 50megaparsecs without interacting with the CMB to produce delta baryons that decay into pions. Anobservatory in Argentina uses four fluorescence detectors and over a thousand water-based Cherenkovdetectors to register these particles; data from that observatory was used to reject the theory of the isotropicdistribution for certain types of them. That is the Pierre Auger observatory. That aforementioned energy isthe GZK limit. The most energetic particle of this type to be detected was the Oh-My-God particle. For 10points, name these highly energetic particles from outer space.
Carl Stoermer pioneered the use of rigidity cutoffs in determining what amount of these particlespenetrate the Earth's atmosphere.
cosmic rays [or any type of energy cosmic ray, such as ultra high energy, etc.; prompt on protons; prompt on neutrinos; do not accept galactic or extragalactic cosmic rays]