Cosmic-ray electron-positron spectrum from 7 GeV to 2 TeV with the Fermi Large Area Telescope
Abdollahi, S. ; Ackermann, M. ; Ajello, M. ; Cavazzuti, E. ;et al.
Apr - 2017
DOI: 10.1103/PhysRevD.95.082007

journal : Physical Review D

Volume : 95 ; Issue : 8
type: Article Journal

We present a measurement of the cosmic-ray electron+positron spectrum between 7 GeV and 2 TeV performed with almost seven years of data collected with the Fermi Large Area Telescope. We find that the spectrum is well fit by a broken power law with a break energy at about 50 GeV. Above 50 GeV, the spectrum is well described by a single power law with a spectral index of 3.07±0.02(stat+syst)±0.04(energy measurement). An exponential cutoff lower than 1.8 TeV is excluded at 95% CL.

keywords : Astrophysics - High Energy Astrophysical Phenomena