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Dark Matter
Linked via "Strong lensing"
Strong and Weak Lensing
Strong lensing, observable around massive galaxy clusters, creates arcs, multiple images, and Einstein rings. By precisely measuring the distortion parameters, astronomers can reconstruct the total mass distribution, irrespective of whether that mass shines. Crucially, lensing analyses consistently show that the mass centroids of these clusters do not align perfectly with the location of the brightest, X-ray-emitting gas (baryonic mass), suggesting that dark matter fo… -
Non Baryonic Mass
Linked via "strong lensing"
Gravitational Lensing
Gravitational lensing provides a direct mapping of total mass, independent of the nature of that mass. Both strong lensing (producing arcs and multiple images) and weak lensing (statistical shear of distant galaxy shapes) confirm that the mass centers of galaxy clusters far outweigh their visible components. In the Bullet Cluster (1E 0657-56), observations clearly demonstrate a spatial separation… -
Non Baryonic Matter
Linked via "strong lensing"
Gravitational Lensing
Massive concentrations of non-baryonic matter (e.g., galaxy clusters) bend the spacetime around them, magnifying and distorting the images of background objects. Analysis of strong lensing and weak lensing events allows astronomers to map the total mass distribution, consistently revealing that the majority of the mass resides where no light is emitted. Extreme lensing events, such as those ob…