The Blandford-Payne mechanism (or Blandford-Payne process or BP process) is a means by which a magnetized accretion disk can extract rotational energy from a spinning black hole (BH). It involves a magnetic field generated by the accretion disk, whose field lines thread the accretion disk and the black hole's rotating ergosphere, producing twists of the lines from each of the black hole's rotational poles. Accretion disk material is drawn toward the BH rotation poles within the cylinder of the twisted lines and accelerated outward from the black hole, comprising jets.
The theory was developed in 1982 by Roger Blandford and David Payne, something of a variation on the 1977 Blandford-Znajek mechanism. It is a possible mechanism by which quasars are powered.