For the first time, an international team from the SDSS (Sloan Digital Sky Survey) observation program was able to draw up a 3D cartography of quasars, the brightest objects in the Universe. It is the largest map of objects in the Universe drawn so far by the scientific community, in which researchers from the CEA and the CNRS have participated. Using a large-scale spectroscopic analysis technique, their work also makes it possible to measure the expansion speed of the Universe, and confirms the predictions made so far by the standard cosmology model. These results are currently being published in Monthly Notices of the Royal Astronomical Society and are already available on the Arxiv.org website.
Click here to read the press release in French on the CEA website
