U. Kraus 2001 ApJ 563 289 doi:10.1086/323791
Hollow Accretion Columns on Neutron Stars and the Effects of Gravitational Light Bending
FREEU. Kraus1
Show affiliationsThis study investigates the beam patterns for radiation originating in a hollow column on a slowly rotating neutron star where the Schwarzschild metric is appropriate for calculating photon paths. The beam pattern of a hollow column is the sum of contributions from the two emitting surfaces on the inside and the outside of the column, which combine into a two-component beam pattern. The shapes of the inside beam pattern, the outside beam pattern, and the combined beam pattern are studied for radial cones of different height and width, for isotropic and beamed emission, and for different values of mass and radius of the neutron star. It is argued that the hollow cone model provides an interpretation of the pulse profiles of the X-ray pulsar Centaurus X-3.
- Subject headings
gravitational lensing; pulsars: general; pulsars: individual (Centaurus X-3); stars: neutron; X-rays: binaries
- Dates
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Issue 1 (2001 December 10)
Received 2000 November 27, accepted for publication 2001 August 14
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Hollow Accretion Columns on Neutron Stars and the Effects of Gravitational Light Bending
U. Kraus 2001 ApJ 563 289
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