Perspective on the cosmic-ray electron spectrum above TeV

Understand

The AMS-02 has measured the cosmic ray electron (plus positron) spectrum up to ~TeV with an unprecedent precision.

• The spectrum can be well described by a power law without any obvious features above 10 GeV.
• The satellite instrument Dark Matter Particle Explorer (DAMPE), which was launched a year ago, will measure the electron spectrum up to 10 TeV with a high energy resolution.
• The cosmic electrons beyond TeV may be attributed to few local cosmic ray sources, such as supernova remnants.