Stream-field interactions in the magnetic accretor AO Piscium

Details Stream-field interactions in the magnetic accretor AO Piscium Stream-field interactions in the magnetic accretor AO Piscium

2005-03-09

arxiv.org/abs/astro-ph/0503207v1

Astrophys.J. 626 (2005) 1028-1032

Astronomy and Astrophysics

Astrophysics

Accepted for ApJ; 6 pages

Scientific paper

10.1086/430123

UV spectra of the magnetic accretor AO Psc show absorption features for half the binary orbit. The absorption is unlike the wind-formed features often seen in similar stars. Instead, we attribute it to a fraction of the stream that overflows the impact with the accretion disk. Rapid velocity variations can be explained by changes in the trajectory of the stream depending on the orientation of the white-dwarf's magnetic field. Hence we are directly observing the interaction of an accretion stream with a rotating field. We compare this behavior to that seen in other intermediate polars and in SW Sex stars.

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