X-ray pulsar models. II - Comptonized spectra and pulse shapes

Details X-ray pulsar models. II - Comptonized spectra and pulse shapes X-ray pulsar models. II - Comptonized spectra and pulse shapes

Dec 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985apj...299..138m&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 299, Dec. 1, 1985, p. 138-153.

Astronomy and Astrophysics

Astrophysics

89

Compton Effect, Pulsars, Radiative Transfer, Stellar Models, Stellar Spectra, X Ray Binaries, Continuous Spectra, Cyclotron Radiation, Optical Thickness, Stellar Atmospheres, X Ray Spectra

Scientific paper

Pulse shapes and spectra for various X-ray pulsar models, including simple self-emitting or externally illuminated slabs and columns, are calculated. A discrete-ordinate transfer scheme with eight angles x 32 frequencies x two polarizations is used, and bulk motions and inhomogeneities are ignored. With these simplifications, the calculated pulse shapes, cyclotron profiles, and continua as a function of phase angle are compared against observations. This indicates that slab models are in better general agreement with observations than column models. The possibility of determining the cyclotron energy by means of the pulse shapes is discussed.

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