Pressure Difference: X-ray and Radio

• Problems with equipartition assumptions.

• Possible additional contributions in holes from:

  • Magnetic fields
  • Low energy, relativistic electrons
  • Very hot, diffuse, thermal gas (limited to > 15 keV [Hydra A, Nulsen et al. 2002], 11 keV [Perseus, Schmidt et al. 2002], 20 keV [A2052, Blanton et al. 2003]). Look with XMM-Newton or Constellation-X.