Chang-Refsdal lens

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A Chang-Refsdal lens is a point-mass gravitational lens (e.g. Black hole) perturbed by constant external shear.[1]

The name derives from K. Chang and Sjur Refsdal who in 1979 published a paper in NATURE 282, 561. "Flux Variations of QSO Q0957+561 A,B and image splitting by stars Near the Light Path." The paper showed that stars could affect quasar image brightness.

[edit] References

  1. ^ Citebase - The Chang-Refsdal Lens Revisited

[edit] See also

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