Stream-fed Accretion in Intermediate Polars

Details Stream-fed Accretion in Intermediate Polars Stream-fed Accretion in Intermediate Polars

2002-01-29

arxiv.org/abs/astro-ph/0201475v1

Astronomy and Astrophysics

Astrophysics

10 pages, 6 figures, To appear in 'The Physics of Cataclysmic Variables and Related Objects', Goettingen, August 5-10, 2001; i

Scientific paper

I review the observational evidence for stream-fed accretion in intermediate polars. Recent work on the discless system V2400 Oph confirms the pole-flipping model of stream-fed accretion, but this applies only to a minority of the flow. The bulk of the flow is in the form of blobs circling the white dwarf, a state which might have been a precursor to disc formation in other IPs. I also discuss work on the systems with anomalously long spin periods, V1025 Cen and EX Hya. There are arguments both for and against stream-fed accretion in V1025 Cen, and further work is necessary before reaching a conclusion about this system.

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