This is the first member of the so-called Low Accretion Rate Polars,
characterized by an almost pure cyclotron emission spectrum. This
object has not been seen in the X-rays, indicating a very low mass
transfer rate. More recently, people started to wonder whether this is
a polar, or rather a pre-polar in which the white dwarf is accreting
not through Roche-lobe overflow, but from the wind of the still
detached donor star. Monitoring is extremely important, as the
detection of a real high state would clearly rule out that second
possibility.
|

|