Physics & Astronomy Colloquium
3:30 PM, Friday, January 22, 2010
Room 155, Chem-Phys Building
Dr. John Harton
Department of Physics and Astronomy
Colorado State University
"Measuring the Highest Energy
Particles in the Universe - Results from the Pierre Auger Observatory''
The southern part of the Pierre Auger Observatory is complete and is
operating in Malargue, Argentina. The Auger detectors measure
particles arriving from outside the Earth's atmosphere with
energies from 1017 eV to over 1020 eV;
these energies are far above those achievable in man-made accelerators.
Results include the energy spectrum, arrival direction analysis,
nuclear composition of the incident flux, and limits on the
fraction of neutrinos and photons in the primary cosmic ray flux.
Refreshments will be served in CP 179 at 3:15 PM