Massive Baby Galaxies Found Swaddled in Dark Matter Knot

In new observations, an extremely concentrated knot of ancient galaxies undergoing energetic star formation at the dawn of our universe has been spied embedded in a knot of dark matter.

December 4, 2015
1:21 PM EST
On the left is the image taken at sub-millimeter wavelengths with the Atacama Submillimeter Telescope Experiment (ASTE). It looks like there is one bright monstrous galaxy. In the center is an image taken at the same sub-millimeter wavelengths, but this time using ALMA. With 60 times better resolution and 10 times better sensitivity, we can see that actually there are 3 monstrous galaxies close together. On the right is the same region photographed in visible light by the Subaru Telescope. We can see that not all of the monstrous galaxies show up in this picture, or at the least that some of them must be very faint. | ALMA (ESO/NAOJ/NRAO), NAOJ, H. Umehata (The University of Tokyo)