Eddington Rate

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"Magnetic fields thus determine how efficiently a gram of matter radiates light as it spirals towards a black hole. A magnetic field with twist and turns will gum up the flow, causing it to heat up and emit powerful radiation that could stem the infall of material. But, says Natarajan, if the magnetic field takes a direct path and neatly threads an accretion disk, simulations suggest it can whisk material to the black hole, feeding it much faster than the Eddington rate."

Astronomy Magazine March 2021 "How to Grow a Giant Black Hole" pp. 16-23