Leon M. Lederman

• giant of particle physics and particularly neutrino physics
• Director of Fermilab
• Educator
• brilliant speaker and storyteller: examples here, here, here, here

Bremsstrahlung: Free-Free Emission

• Order of Magnitude Expectations
• Theory: Classical, Non-Relativistic Case
• thermal bremsstrahlung
• self-absorption spectrum from here
• example: intracluster medium
  • galaxy clusters seen in optical light: Virgo, Coma, Abell 1689
  • intracluster medium seen in X-rays: Virgo, Coma, Abell 1689
• example: supernova remnants
  • Cas A: Chandra X-ray image, spectrum
  • SN 1006: Chandra X-ray image, spectrum