Georganopoulos, Markos

Quasar large scale jets: Fast and powerful or weak and slow, but efficient accelerators?.

The X-ray emission of powerful large scale quasar jets has be attributed to both inverse Compton scattering of cosmic microwave background photons from from ~10-100 MeV electrons in a fast (bulk Lorentz factor ~10-20) and powerful jet (close to or higher than the Eddington luminosity) and synchrotron radiation from a population of 10-100 TeV electrons in a jet that can be slow (bulk Lorentz factor ~1.5-3) and weak (~three orders of magnitude below Eddington). Obviously, these are two very different realities that will impact the host galaxy cluster in very different ways. We present Fermi-based work in the direction of deciding the above issue.