Diamagnetic accretion in intermediate polars - I. Blob orbits and spin evolution

Details Diamagnetic accretion in intermediate polars - I. Blob orbits and spin evolution Diamagnetic accretion in intermediate polars - I. Blob orbits and spin evolution

Jul 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995mnras.275....9w&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 275, Issue 1, pp. 9-21.

Astronomy and Astrophysics

Astronomy

59

Accretion, Accretion Discs, Binaries: Close, Stars: Magnetic Fields

Scientific paper

We present numerical confirmation of King's diamagnetic blob accretion model. Spin evolution of the white dwarf leads to the relation P_spin~0.1P_orb observed for some intermediate polars. Fixing this relation gives a rough estimate of the white dwarf field strength in the range 10^6>B>10^4 G, depending on the uncertain blob parameters. We show that mass transfer from the companion is likely to be unstable except near spin equilibrium of the white dwarf, so that deviation from equilibrium should be short-lived (<~10^5 yr). Stable mass transfer for intermediate polars in spin equilibrium is similar to the conservative case and requires q<0.7, P_orb<5-6h.

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