Overview

self-absorption


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The absorption of radiation before it can escape from the region from which it is emitted. Synchrotron emission is prone to self-absorption, causing the intensity of emission at low frequencies to fall off; the spectrum is then said to turn over. The term is also used to describe the reduction in intensity at the centre of a spectral line due to a surrounding shell of cool material.

Subjects: Astronomy and Astrophysics.


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