Astrophysics and particle physics with cosmic-ray electrons and positrons

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School of Physics Center for Relativistic Astrophysics Seminar: Presenting Justin Vandenbroucke, Stanford University

Cosmic rays are predominantly nuclei, in particular protons.  However, the less abundant cosmic-ray electrons and positrons are also important probes of open questions in astrophysics and particle physics.  The Fermi Gamma Ray Space Telescope, designed to study the high-energy universe with gamma rays, is also an excellent electron and positron detector.  Ground-based imaging atmospheric Cherenkov telescopes have also measured cosmic-ray electrons and positrons up to several TeV.  PAMELA, Fermi, and AMS have discovered a surprising excess of positrons between 10 GeV and 350 GeV.  I will describe these measurements and their implications for astrophysics and particle physics, as well as prospects for future measurements.


  • Workflow Status:Published
  • Created By:Alison Morain
  • Created:04/17/2013
  • Modified By:Fletcher Moore
  • Modified:10/07/2016