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This answer to What defines the plane of an accretion disk around a black hole? mentions the Penrose process as a potential mechanism that could change the axis of the orbital angular momentum of an accretion disk around a black hole away from the original axis of the infaling matter's source (e.g. a companion star, a galaxy) and towards the the black hole's axis of rotation.

Here I'm just asking if the theoretical Penrose process has ever been linked to an observation, or has been used as part of a potential explanation of an observed phenomenon.

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  • $\begingroup$ We could see the orbital speed of a star around S* increasing round after round? How long should we look? $\endgroup$ – J. Chomel Aug 21 '18 at 13:29
  • $\begingroup$ @J.Chomel "Here I'm just asking if the theoretical Penrose process has ever been linked to an observation, or has been used as part of a potential explanation of an observed phenomenon." If the answer is no, then that would be the answer! $\endgroup$ – uhoh Aug 21 '18 at 14:33
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    $\begingroup$ I found Observations of the Blandford–Znajek process and the magnetohydrodynamic Penrose process in computer simulations of black hole magnetospheres which talks about the Blandford–Znajek process and of the MHD Penrose effect. Supposidely they have been both observed in computer simulations. I am not sure how the magnetohydrodynamic Penrose process and the Penrose process are related, but maybe one of you out there can explain (and move thus move towards an answer)? $\endgroup$ – B--rian Mar 18 at 9:01

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