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Schematic representation of a protoplanetary disk, showing a dead zone

Schematic representation of a protoplanetary disk, showing a dead zone
Schematic representation of a protoplanetary disk, showing a dead zone Ionizing radiation (wavy red lines) is unable to penetrate deep into the disk, and therefore the disk gas will not become ionized, any existing magnetic field will not be able to couple to the gas, and hence no turbulence will be generated. LANL