Spin-orbit coupling in magnetic systems
€The two
stars in Polar systems rotate synchronously with the orbit by the
magnetic interactions, except in the case of 4 systems which deviate slightly
from synchronism
€Intermediate
Polar systems are not synchronised
€Many
IPs are found
to have
Pspin~0.1Porb
due to field/stream interactions
€As the
binary evolves
and the period
decreases it is likely that some IPs evolve into Polars
Norton, Somerscales & Wynn (2003)