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The influence of the inclination of the accretor’s magnetic axis on the accretion-disk structure in intermediate polars

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Abstract

Typical changes of the accretion-disk structures in intermediate polars are studied as a function of the inclination of the accretor’s magnetic field. Thre-dimensional numerical modeling was performed for seven differentmagnetic-axis inclinations. The results showthat the system forms a magnetosphere region, and that column accretion occurs. The action of the magnetic field tilts the inner parts of the disk along the magnetic axis of the accretor. The magnetic-field inclination appreciably influences matter transfer in the disk and accretion processes. Generation of toroidal magnetic field, magnetic braking, and alignment of the dipole magnetic field result in oscillations of the accretion rate. A direct relationship between the field inclination and the oscillation amplitude is found, as well as an inverse relationship between the field inclination and the oscillation period.

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Authors and Affiliations

  1. Institute of Astronomy, Russian Academy of Sciences, ul. Pyatnitskaya 48, Moscow, 119017, Russia

    V. A. Ustyugov, A. G. Zhilkin & D. V. Bisikalo

  2. Chelyabinsk State University, ul. Bratyev Kashirinykh 129, Chelyabinsk, 454001, Russia

    A. G. Zhilkin

Authors
  1. V. A. Ustyugov
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  2. A. G. Zhilkin
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  3. D. V. Bisikalo
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Correspondence to V. A. Ustyugov.

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Original Russian Text © V.A. Ustyugov, A.G. Zhilkin, D.V. Bisikalo, 2013, published in Astronomicheskii Zhurnal, 2013, Vol. 90, No. 11, pp. 885–891.

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Ustyugov, V.A., Zhilkin, A.G. & Bisikalo, D.V. The influence of the inclination of the accretor’s magnetic axis on the accretion-disk structure in intermediate polars. Astron. Rep. 57, 811–817 (2013). https://doi.org/10.1134/S1063772913110061

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  • DOI: https://doi.org/10.1134/S1063772913110061

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