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Our research reaches from the primordial fluctuations in the Universe down to its structuration at the largest scales in the most recent era. We study how the cosmic web elements are forming and evolving both through modelling and observations.
Latest news
Astrophysicists consider that around 40% of the ordinary matter that makes up stars, planets and galaxies remains undetected, concealed in the form of a hot gas in the complex cosmic web. Today, IAS scientists may have detected, for the first time, this hidden matter through an innovative statistical analysis of 20-year-old data.
The Planck collaboration has just published its last series of articles, for a total of 164. These papers have been cited more than 90,000 times, which demonstrates the long lasting influence of this experiment for cosmology, including the study of the mass of neutrinos, the density of dark matter, the characteristics of primordial fluctuations, the formation and evolution of galaxies and clusters or even the magnetic field of the Milky Way.
About 120 scientists from French labs belonging to the European cosmology space mission Euclid gathered in a conference organized by IAS in november 2019 in Orsay. Euclid launch is scheduled in 2020.
The PILOT instrument took off on the morning of the 24th of September from Timmins airport (Ontario, Canada). This third flight of this instrument, on board of a stratospheric balloon, lasted for 25 hours, among which three hours to rise to the ceiling altitude, one hour dedicated to the instrument tuning, and 20 hours of scientific observations at the ceiling (about 38km on daytime and 34km during night). All flight systems and the scientific instrument behaved nominally, and the data produced by the instrument are of very good quality.
On Monday, March 12th, IAS delivered the flight model of the in-flight calibration system (Calibration Unit, CU) of the VIS instrument of the Euclid mission. Euclid is the M2 mission of the ESA Cosmic Vision programme, whose scientific objective is to map the Universe to explain the cause of the acceleration of its expansion. It will achieve this by looking up to 10 billion years in the past and by closely tracking the shape and distribution of galaxies the Universe contains.
