Tipo di tesi
Tesi di dottorato di ricerca
Titolo
Cosmic-ray electrons and positrons with the Fermi Large Area Telescope
Settore scientifico disciplinare
FIS/05 - ASTRONOMIA E ASTROFISICA
Riassunto (Italiano)
In this work it is described a measurement of the cosmic ray inclusive electron and positron spectrum performed with 7 years of data collected by the Fermi Large Area Telescope, covering the energy range from 7 Gev to 2 TeV. The analysis reduces the statistical and systematics uncertainties compared to previous Fermi measurements and eliminates also some unaccounted bias which affected them in the low energy region. The spectrum found is well described by a broken power-law, with a break at 53±8 GeV and spectral index of -3.21 ± 0.02 below the break and -3.07 ± 0.02(stat+syst) ± 0.04 (energy scale) above. The predicted deviation from power-law behavior above 1 TeV is not confirmed by the data.
