A model for X-ray pulsar spectra

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Pulsars, Radiative Transfer, Stellar Magnetic Fields, Stellar Spectra, X Ray Sources, X Ray Spectra, Energy Spectra, Monte Carlo Method, Stellar Atmospheres, Stellar Rotation

Scientific paper

The transfer of X-rays through a hot, magnetized, scattering atmosphere is studied using a Monte Carlo technique. The process considered is Compton scattering, including cyclotron resonance scattering. Unlike previous work on the subject, the effects of frequency shifts, relativistic corrections, recoil, and polarization mode changes have been included. It is found 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. The relevance of the results to observed pulsar spectra is indicated.

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