Magnetohydrostatics in the polar caps of accreting magnetized white dwarfs

Details Magnetohydrostatics in the polar caps of accreting magnetized white dwarfs Magnetohydrostatics in the polar caps of accreting magnetized white dwarfs

Apr 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985a%26a...145l..10h&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 145, no. 2, April 1985, p. L10-L12.

Astronomy and Astrophysics

Astrophysics

7

Magnetic Stars, Magnetohydrostatics, Polar Caps, Stellar Magnetic Fields, Stellar Mass Accretion, White Dwarf Stars, Cataclysmic Variables

Scientific paper

The mechanism of quasi-periodic luminosity variations seen in cataclysmic variable stars is investigated theoretically. Numerical calculations are performed for the model proposed by Livio (1984), in which matter accreted onto the polar caps of a magnetized white dwarf causes repeated breaking of the magnetic-field lines; the method is based (by analogy) on the analysis of magnetic-field disruption in magnetized neutron stars of Hameury et al. (1983). It is found that any such magnetic-field breaking gives recurrence times orders of magnitude greater than those actually observed in magnetized cataclysmic variables suggesting that some other mechanism must be found for the quasi-periodic variations.

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