Measurement of the energy spectrum of cosmic rays above 1018 eV using the Pierre Auger Observatory
Abstract:
We report a measurement of the flux of cosmic rays with unprecedented precision and statistics using the Pierre Auger Observatory. Based on fluorescence observations in coincidence with at least one surface detector we derive a spectrum for energies above 1018 eV. We also update the previously published energy spectrum obtained with the surface detector array. The two spectra are combined addressing the systematic uncertainties and, in particular, the influence of the energy resolution on the spectral shape. The spectrum can be described by a broken power law E−γ with index γ=3.3 below the ankle which is measured at log10(Eankle/eV)=18.6. Above the ankle the spectrum is described by a power law with index 2.6 followed by a flux suppression, above about log10(E/eV)=19.5, detected with high statistical significance.
Año de publicación:
2010
Keywords:
- cosmic rays
- Pierre auger observatory
- Energy spectrum
Fuente:
scopus
googleTipo de documento:
Other
Estado:
Acceso abierto
Áreas de conocimiento:
- Ciencia planetaria
- Rayo cósmico
- Ciencia planetaria
- Física
Áreas temáticas de Dewey:
- Mecánica clásica
- El proceso político
- Cuerpos y fenómenos celestes específicos
- Física moderna
- Astronomía y ciencias afines
Objetivos de Desarrollo Sostenible:
- ODS 7: Energía asequible y no contaminante
- ODS 13: Acción por el clima
- ODS 16: Paz, justicia e instituciones sólidas
- ODS 17: Alianzas para lograr los objetivos
- ODS 9: Industria, innovación e infraestructura