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Limb Darkening

Limb Darkening. Fiona Ward. (false color). What is Limb Darkening?. Limb darkening: the diminishing of intensity in the image of a star as one moves from the center of the star to the edge ("limb“) of the star. . What Causes Limb Darkening?.

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Limb Darkening

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  1. Limb Darkening Fiona Ward (false color)

  2. What is Limb Darkening? • Limb darkening: the diminishing of intensity in the image of a star as one moves from the center of the star to the edge ("limb“) of the star.

  3. What Causes Limb Darkening? • As distance from center increases, density of star decreases • As distance from center increases, temperature of star decreases • Increased absorption of relatively cool solar gases (false color)

  4. Factors Affecting Limb Darkening • Optical Depth • Defines the visible edge of a star • Temperature of Stellar Atmosphere • Temperature increases as distance from center decreases Temp. increases Temp. increases center

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