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Binary orbital orientation modelling

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The statistical dependence of the incline of the radiopulsar orbital plane to the Be-star equatorial plane on the characteristic kick velocity was calculated. These systems must have an orbital modulation effect of non-pulsatile Compton X-ray radiation if pulsar orbital and Be-star equatorial planes are not coplanar. The Be star is a rapidly rotating object and its temperature changes according to the von Zeipel theorem. That is why conditions for inverse Compton dispersion of optical photons emitted by the Be star on the relativistic particles in inclined systems change during the orbital period. This orbital modulation effect becomes about 10% or more if the angle between the pulsar orbital and Be-star equatorial planes is about 80° or higher. It is calculated that systems with this angle higher than 80° may exist owing to an additional kick during a supernova explosion and their number may reach 15% of visible binary 'radiopulsar-Be-star' systems.

Keywords: Be-star; Kick; Pulsar; Radiopulsar; Supernova Explosion

Document Type: Research Article

DOI: http://dx.doi.org/10.1080/10556790310001612526

Publication date: February 1, 2004

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