High-Energy Polarization Signatures of Leptonic and Hadronic Models for Blazars

The advent of new X-ray polarimeters as well as the potential of Fermi to measure gamma-ray polarization up to 200 MeV opens a new window of opportunity to diagnose the structure and composition of relativistic jets in blazars, the dominant radiation mechanisms, and the location of the gamma-ray emission zones. We have developed a versatile code to evaluate the X-ray and gamma-ray polarization from synchrotron and synchrotron self-Compton emission for arbitrary particle distributions in blazar jets. This code is applied to make predictions for the degree of polarization at X-ray and soft gamma-ray energies for parameters resulting from existing leptonic and hadronic single-zone model fits to the SEDs of a number of Fermi detected blazars.