The cluster is connected by a filament of matter to Abell 223 that is permeated by hot X-ray emitting gas. Research shows that this filament only contains about 20 percent of normal matter, the rest is assumed to be dark matter. This is seen to be in good agreement with the cosmological standard model.
- Pete Spotts (5 July 2012). "Cosmic scaffolding uncovered? Scientists find thread of dark matter.". The Christian Science Monitor. Christian Science Publishing Society. Retrieved 14 July 2012.
- "ID: SEMHZOZXUFF: Galaxy clusters Abell 222 and Abell 223". esa. Retrieved 2012-09-24.
- "Eine Brücke aus dunkler Materie zwischen zwei Galaxienhaufen" (in German). Neue Zürcher Zeitung. 17 July 2012. Archived from the original on 17 July 2012. Retrieved 2012-09-24.
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