Wednesday, March 28, 2018

fluffy darkness

Saw headlines in the interwebs about a recent discovery: a galaxy without dark matter. Read the article at Sky & Telescope.

The galaxy NGC 1052-DF2, described as "fluffy," makes no sense to astronomers. It seems to be without dark matter or with very little dark matter. The surprisingly large galaxy appears internally sparse or diffuse and the globular clusters within are moving at rates slower than expected. It is unclear if the ultra-diffuse galaxy (UDG) had gas or dark matter that was stripped from it. The team is looking at other UDGs to see if they exhibit the same characteristics.

Dragonfly lenses

The primary instrument used in this analyses was the Dragonfly Telephoto Array from the Dunlap Institute headed up by Roberto Abraham. Cool!

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