We have reviewed some examples where X-ray and radio astronomy act in conjunction to reveal the workings of energy and matter outflow. Radio observations show the presence of magnetic fields, and allow calculations of minimum energy densities and total energy. X-ray observations can sometimes break the degeneracy between the magnetic field and particle densities and thus test the equipartition assumptions, although notably in the case of quasar jets the X-ray observations add a new parameter by revealing bulk relativistic motions. In the case of clusters of galaxies, the radio observations apparently have solved the problem of retarding the cooling flows in clusters of galaxies, while the energetics required by the X-ray data lead to an inference of much larger total energies being supplied by the central black hole.
Acknowledgements
This work was supported in part by NASA contract NAS8-39073 to the Chandra X-ray Center, and NASA grant GO2-3151C to SAO. This research used the NASA Astrophysics Data System Bibliographic Services, and the NASA/IPAC Extragalactic Database (NED) which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration.