Limb darkening

dcterms modified equal to or less than 2020-11-10T18:29:18.593Zequal to or more than 2020-11-10T18:29:18.593Z
broader original
922 original
definition An apparent decrease in brightness of the Sun near its edge as compared to its brightness toward the center. Limb darkening is readily apparent in photographs of the Sun. The reason is that when we look toward the disk's center we look into deeper and hence hotter layers along the line of sight. Toward the limb, we get radiation from higher and hence cooler and less bright layers of the photosphere. Limb darkening has been detected in the case of several other stars. A similar phenomenon occurs in eclipsing binaries where the effect of limb darkening on one or both components manifests itself in the shape of the system's light curve.
Resource original
Concept original
contributor AAS_Frey.Katie original