Magnetism helps black holes blow off gas

Winds rushing away from accretion disk are driven by magnetic fields

GRO J1655-40

WIND POWER  A black hole steals gas from a normal star in this artist’s illustration of the binary star system GRO J1655-40. Most of the gas is pulled into an inward-spiraling disk (red) around the black hole, but winds driven by magnetic fields blow some gas away.

M. Weiss/CXC/NASA

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