Scalar field as a function of space and time for a fixed Gaussian density distribution. For clarity, the unperturbed regions are shown in black.

From the article:

Releasing Scalar Fields: Cosmological Simulations of Scalar-Tensor Theories for Gravity Beyond the Static Approximation
Claudio Llinares and David F. Mota
Phys. Rev. Lett. 110, 161101 (2013)

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