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Accretion Disks and X-Ray Binaries
Grade Level
Astronomy
AST.209 Accretion Disks and X-Ray Binaries
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A student sees the terms 'black hole' and 'X-rays' and says the X-rays must be emitted from inside the black hole. Which explanation is best?
A
The X-rays are unrelated to the binary and must come from Earth.
B
The X-rays are produced only by cold dust far outside the binary.
C
The X-rays escape from below the event horizon because X-rays are stronger than gravity.
D
The X-rays are emitted by hot gas outside the event horizon, mainly in the accretion flow.
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