Lensing by a spherical boson star. The colors represent the four quadrants of the celestial sphere. The black lines represent a grid of latitude and longitude. The white circles are Einstein rings.

From the article:

Shadows of Kerr Black Holes with Scalar Hair
Pedro V. P. Cunha, Carlos A. R. Herdeiro, Eugen Radu, and Helgi F. Rúnarsson
Phys. Rev. Lett. 115, 211102 (2015)

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