X-ray pulsar models. I - Angle-dependent cyclotron line formation and comptonization

A multiangle, incoherent scattering formalism that yields pulse phase spectroscopic information is used to calculate spectra and cyclotron line shapes of static X-ray pulsar atmospheres with slab and column geometry. Comparisons with observations of integrated spectra and of phase-dependent cyclotron line properties indicates a better fit for the slab models. The illumination of inner or outer boundaries by external photon sources is allowed for, and the examples considered are an arbitrary input at the inner boundary.