Mysterious Cosmic 'Dark Flow' Tracked Deeper into Universe
Distant galaxy clusters mysteriously stream at a million miles per hour along a path roughly centered on the southern constellations Centaurus and Hydra. A new study led by Alexander Kashlinsky at NASA's Goddard Space Flight Center in Greenbelt, Md., tracks this collective motion -- dubbed the "dark flow" -- to twice the distance originally reported. Source: NASA/Goddard Space Flight Center - Discipline: Astronomy
"This is not something we set out to find, but we cannot make it go away," Kashlinsky said.
"We detect motion along this axis, but right now our data cannot state as strongly as we'd like whether the clusters are coming or going," Kashlinsky said.
"It takes, on average, about an hour of telescope time to measure the distance to each cluster we work with, not to mention the years required to find these systems in the first place," Ebeling said. "This is a project requiring considerable followthrough."
"When processed, these same clusters also display the strongest KSZ signature -- unlikely if the dark flow were merely a statistical fluke," he said.
Mysterious Cosmic 'Dark Flow' Tracked Deeper into Universe
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Mysterious Cosmic 'Dark Flow' Tracked Deeper Into Universe
New study tracks the stream of distant galaxy clusters along a path centered on Centaurus and Hydra.
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Distant galaxy clusters mysteriously stream at a million miles per hour along a path roughly centered on the southern constellations Centaurus and Hydra. A new study led by Alexander Kashlinsky ...
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Image Caption: The colored dots are clusters within one of four distance ranges, with redder colors indicating greater distance. Colored ellipses show the direction of bulk motion for the clusters ...
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