US EditionAstronomers discover rare Einstein cross with a fifth image, revealing hidden dark matter
4 Articles
4 Articles
A strange 'Einstein Cross', with an additional image to the four that usually form this unusual cosmic configuration, has been identified as a massive halo of dark matter.
Astronomers Discover Rare Einstein Cross With Fifth Image, Revealing Hidden Dark Matter
An "Einstein Cross" is a rarely seen cosmic configuration, in which the light from a distant galaxy is bent by the gravity of galaxies in front of it, creating four images. But scienitsts have found an extra image in an Einstein Cross -- a fifth point of light. This, they found, pointed to "something unusual," which turned out to be a massive, hidden halo of dark matter. The existence of this invisible structure could only be inferred through ca…
When Rutgers' theoretical astrophysicist Charles Keeton first saw an unusual picture shared by his colleague, he was intrigued. "Have you ever seen an Einstein cross with an image in the middle?" His colleague Andrew Baker asked, referring to a cosmic configuration rarely seen. Keeton had not done so. The implications were enormous. [...]
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