Model for X-ray pulsar spectra

We have studied the transfer of X-rays through a hot, magnetized, scattering atmosphere using a Monte Carlo technique. The process considered is Compton scattering, including cyclotron resonance scattering. Unlike previous work on the subject, we have included the effects of frequency shifts, relativistic corrections, recoil, and polarization mode changes. We find that the emergent X-ray spectra harden toward the magnetic equator, are cut off at a frequency less than the fundamental cyclotron frequency, and depend on the magnetic field strength. We discuss our results and point out their relevance to observed pulsar spectra