spacetime (IMAGE)
Caption
Figure 3: Visualisation of smooth versus crinkly spacetime produced by different forms of Dark Matter around galaxies. Left: Dark Matter comprising ultramassive particles create a smooth curvature in spacetime, such that light from a distant lensed galaxy takes smooth paths around the foreground lensing galaxy. Right: Dark Matter comprising ultralight particles creates crinkly fluctuations in spacetime, such that light from a distant lensed galaxy takes chaotic paths around the foreground lensing galaxy. The multiple images of the background galaxy thus created are predicted to have different positions and brightness for the different forms of Dark Matter around the lensing galaxy, allowing astrophysicists to probe the nature of Dark Matter.
Credit
The University of Hong Kong
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