le 9 septembre 2022, 11h à 13h, Louise Mousset, salle Jules Verne, OMP Resumé: The measurement of the B-mode polarization of the Cosmic Microwave Background (CMB) is one of the major challenges of observational cosmology. The signal is expected to be of the order of a few tens of nK, prone to instrumental systematic effects and […]
le 2 septembre 2022, 11h à 13h, Arturo Lopez Ariste, salle Jules Verne, OMP Resumé: The phase of a wave can only be defined unambiguously for complex waves. This strange quantity appears at the core of all physics: from the quantification of atomic levels or of the electric charge to the source of the electromagnetic interaction […]
le 17 novembre 2021, 14h00 à 16h00, Philippe Tatry, salle de conférence, IRAP, site Roche Philippe TATRY (Airbus Space Systems) will present the Gaia space mission that is dedicated to compile a 3D space catalogue of more than 1 billion stars, celestial objects, … based on a huge volume of astrometry & astrophysics data collected […]
le 29 novembre 2021, 13h30 à 15h30, Frédéric Pitout, salle de conférence, IRAP, site Roche
le 24 novembre 2021, 10h15 à 12h15, Natalie Webb, salle de conférence, IRAP, site Roche Thanks to large surveys such as Gaia, the Sloan Digital Sky Survey (SDSS), GALEX, 2MASS, NVSS, FIRST, XMM-Newton and Chandra, we have catalogued many different stars and galaxies. We have also found some very exotic objects, especially when we observe […]
le 8 novembre 2021, 15h45 à 17h45, Elias Kammoun, salle Coriolis, OMP Active galactic nuclei (AGN) are one of the most powerful and radiatively efficient sources in the universe. AGN are thought to be powered by accretion of gas onto a supermassive black hole (SMBH; M~10^6-10^9 solar mass). They are known to emit light through the […]
le 29 octobre 2021, 11h à 13h, Alain Blanchard, salle Coriolis, OMP In the early 1980’s cosmology underwent a very important transformation with the introduction of non-baryonic dark matter on the one hand and the theory of inflation on the other. Since the 1990’s the so-called LCDM model has been so successful that the construction […]
le 22 octobre 2021, 11h à 13h, Florian Debras, salle Coriolis, OMP La découverte de la première exoplanète, 51 Peg b, a été un choc pour la communauté qui ne s’attendait pas à trouver une planète semblable à Jupiter 50 fois plus proche de son étoile que Mercure n’est du Soleil ! Depuis, quelques centaines […]
le 15 octobre 2021, 11h à 13h, Gabriele Betancourt, salle de conférence, IRAP, site Roche