ESISBIB Index Card

Date: 19900322
Simbad ID: 1990MNRAS.242..188
Title: X-ray pulsar profile analysis
Author: (AA)LEAHY, D. A.
Affiliation: (AA)(Calgary, University, Canada)
Journal: Royal Astronomical Society, Monthly Notices (ISSN 0035-8711), vol. 242, Jan. 15, 1990, p. 188-193. Research supported by NSERC.
Keywords: EMISSION SPECTRA, PULSARS, X RAY BINARIES, X RAY SOURCES

Abstract: Observed X-ray pulsar profiles are analyzed by fitting to model pulse profiles. A polar-cap emission model for X-rays emitted by accreting neutron stars is constructed using the local X-ray intensity distribution for radiation from a magnetized plasma. Model pulse profiles are computed from the intensity distribution from a filled or annular polar-cap emission region and fitted by least squares to observed pulse profiles of 15 X-ray pulsars. The mean angle between the rotation and magnetic axis is found to be about 24 deg, much smaller than that expected for random orientations. Nine of the 15 X-ray pulsars have profiles which indicate annular shaped polar-cap emission regions.

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