What Does it all Mean?

In V471 Tau:
• The atmosphere is extended, to at least 2 K star radii.
• The gas must be magnetically confined.
• The temperature increases with height.
• The gas is in co-rotation about the K star.
• The gas exhibits blue shifts (flows?) to about 70 km/s.
• There are strong and phase-variable asymetries in the absorbing gas.
• The asymetries are likely not caused by the WD.
• This is consistent with an incomplete shell near the Keplerian co-rotation radius.

Conclusions:
• A lot of gas is confined near the the Keplerian co-rotation radius by giant magnetic loops (forming a quasi-dipolar magnetic canopy?).
• The H-alpha prominences may be cool condensations within a hotter gas.
• The gas in V471 Tau, and the AB Dor pedestal emission, likely have the same origin.
• Rapidly rotating stars have large-scale magnetospheres, with transitions regions and coronae to match.

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