Constraining the emission of cosmic electrons from supernova remnants with flux, dipole anisotropy and radio data
2017 December 12
In this contribution an interpretation of the most recent data on cosmic-ray electron and positron (CRE) fluxes (from Fermi-LAT, HESS, CALET and AMS-02), with a special focus on the electron contribution from supernova remnants (SNRs), is presented. For the first time, the constraints coming from CRE flux up to 20 TeV, as well as Fermi-LAT dipole upper limits and radio measurements of individual nearby SNRs are consider together. It is discussed how CRE data up to 20 TeV can constrain the energy cutoff of the electron emission from a smooth distribution of SNRs in the Galaxy. Also, the consequences of the recent Fermi-LAT measurement of the dipole anisotropy are explored, studying in particular the total emission energy in electrons and spectral index of Vela YZ and the Cygnus Loop SNRs. Finally, the full radio spectrum of nearby SNRs is used to constrain their electron injection spectrum. Results show how the combination of constraints from different observables shed light on the interpretation of present CRE data.