Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996ap%26ss.241..263w&link_type=abstract
Astrophysics and Space Science, Volume 241, Issue 2, pp.263-294
Astronomy and Astrophysics
Astrophysics
26
Scientific paper
The observed spin periods of the primaries in intermediate polars require the presence of torques additional to the standard expectation of material and magnetic torques from an accretion disc. In an extension of earlier work by Wickramasinghe, Wu and Ferrario, from rates of mass transfer deduced from optical and X-ray fluxes, and assuming surface magnetic fields similar to those observed in the most rapidly rotating low mass main sequence stars, it is shown that the magnetohydrodynamic torque between the partially shielded primary and the secondary is sufficient to account for the observed spin periods. It is further found that there is a range of magnetic moments and mass transfer rates in which synchronized rotation of the primary can occur even though it possesses an accretion disc. This may account for the structures deduced for V795 Her and V2051 Oph. An analysis of the observed outbursts (or lack of) in the intermediate polars shown that wheres many systems are explainable in terms of the standard theory of α-discs, in some systems the magnetic structure is supressing expected outbursts and instabilities that are as yet not understood appear in their place.
No associations
LandOfFree
Torques and Instabilities in Intermediate Polars does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Torques and Instabilities in Intermediate Polars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Torques and Instabilities in Intermediate Polars will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1458201