DESI Creates Largest 3D Map of the Cosmos
But work on DESI itself didn’t end once the survey started. “It’s constant work that goes on to make this instrument perform,” said physicist Klaus Honscheid of Ohio State University, co-Instrument Scientist on the project, who will deliver the first paper of the CosmoPalooza DESI session. Honscheid and his team ensure the instrument runs smoothly and automatically, ideally without any input during a night’s observing. “The feedback I get from the night observers is that the shifts are boring, which I take as a compliment,” he said.
But that monotonous productivity requires incredibly detailed control over each of the 5000 cutting-edge robots that position optical fibers on the DESI instrument, ensuring their positions are accurate to within 10 microns. “Ten microns is tiny,” said Honscheid. “It’s less than the thickness of a human hair. And you have to position each robot to collect the light from galaxies billions of light-years away. Every time I think about this system, I wonder how could we possibly pull that off? The success of DESI as an instrument is something to be very proud of.”
Seeing dark energy’s true colors
“Our science goal is to measure the imprint of waves in the primordial DESI Creates Largest 3D Map of the Cosmos