A new three-dimensional map of galaxy clusters has just been published by an international collaboration involving about 100 scientists, through a survey of two regions of the sky each covering about 25 square degrees (about 200 times the area of the full moon in all). This survey, baptized XXL, and carried out thanks in particular to ESA's MM-Newton satellite and ESO telescopes, made it possible to locate and identify 450 clusters of galaxies, as well as 22 000 active galaxies (1). Astronomy & Astrophysics publishes the first series of results of the international collaboration, led by the CEA, and which includes researchers and resources from the CNRS, CNES, Aix Marseille University, and the Observatoire de la Côte-d'Azur.
Click here to read the press release in French on the CEA website
