That “99.9% Darkish Matter” Galaxy Is Really Completely Regular

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Cosmic Puzzle

A couple of years in the past, scientists found an extremely puzzling galaxy that appeared to comprise 10,000 occasions extra darkish matter than seen matter.

The galaxy, named Dragonfly 44, was regarded as some sort of excessive cosmic anomaly. However new research printed final week within the journal Month-to-month Notices of the Royal Astronomical Society means that Dragonfly 44 is definitely pretty regular — and that the scientists who found it simply tousled.

Off-Stability

A typical galaxy might need 10 to 300 occasions extra darkish matter than seen matter, setting Dragonfly 44 vastly other than the norm. Nevertheless it seems, in response to the brand new research, the scientists who found Dragonfly 44 might have vastly overestimated the quantity of darkish matter current. The brand new research brings the darkish matter ratio all the way down to 300 occasions the quantity of seen matter.

“Now we all know that the earlier outcomes have been incorrect and that DF44 is just not extraordinary. It’s time to transfer on,” lead creator Teymoor Saifollahi, a researcher on the Netherlands’ Kapteyn Astronomical Institute, said in a press release.

Case Closed

It’s disappointing that — whereas it nonetheless has a excessive proportion of darkish matter — Dragonfly 44 is much less of a cosmic thriller. Nonetheless, this does tidy issues up from a scientific standpoint.

“Our work reveals that this galaxy is just not so singular nor sudden,” coauthor Michael Beasley, a researcher at Spain’s Instituto de Astrofísica de Canarias mentioned within the launch. “That manner the fashions of galaxy formation can clarify it with out the necessity for modification.”

READ MORE: The puzzle of the strange galaxy made of 99.9% dark matter is solved [Instituto de Astrofísica de Canarias]

Extra on Dragonfly 44: Astronomers Discover A Galaxy Made of 99.99% Dark Matter

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