(means of by which an accretion disk can power a jet)
The Blandford-Payne mechanism (or Blandford-Payne process or BP process)
is a magnetohydrodynamics (MHD) process by which an accretion disk can power a jet.
The theory was developed in 1982 by Roger Blandford and David Payne,
and models the effects of a astrophysical disk's rotation on magnetic field lines
threaded through it.