"Astronomers using NASA's Chandra X-ray Observatory for research are hosting a media teleconference at 1 p.m. EDT Wednesday, June 21, to explain how black holes light up the universe."
"... accepted for publication in Nature ... Here we report that an X-ray-absorbing wind discovered in an observation of the stellar-mass black hole binary GRO J1655-40 must be powered by a magnetic process that can also drive accretion through the disk. Detailed spectral analysis and modeling of the wind shows that it can only be powered by pressure generated by magnetic viscosity internal to the disk or magnetocentrifugal forces. This result demonstrates that disk accretion onto black holes is a fundamentally magnetic process."