le 18 novembre 2022, 11h à 13h, Guillaume Loizelet, salle Jules Verne, OMP, site Belin It is not possible to develop a mathematical model without a reliable and consistent database.In this session, I will first detail the cultural context that led the Babylonian « astronomers » to establish formidable data collections in the form of clay tablets. […]
le 14 octobre 2022, 11h à 13h, Olivier Berné, salle Jules Verne, OMP, site Belin In this seminar, I will present the first scientific results that have been obtained from the JWST mission. After a general presentation of the mission and science results on various topics, I will describe the Early Release Science (ERS) project […]
le 21 octobre 2022, 11h à 13h, Nicolas Clerc, salle Jules Verne, OMP, site Belin Observations of galaxy clusters at X-ray wavelengths offer a unique window to understanding the physical processes governing the assembly of large-scale structure in our Universe and the cosmic web. X-rays signpost the hot and tenuous gas that permeates the entire […]
le 7 octobre 2022, 11h à 13h, Sébastien Guillot, salle Jules Verne, OMP, site Belin Neutron stars are the extremely dense compact remnants of supernova explosions. Despite over 50 years of observations of neutron stars at all wavelengths, the composition and properties of the matter inside their core remain unknown because such densities are not […]
le 16 septembre 2022 de 11h00 à 13h00, Sylvestre Maurice, salle Jules Verne, OMP, site Belin
le 23 septembre 2022, 11h à 13h, Katia Ferrière, salle Jules Verne, OMP, site Belin Magnetic fields are ubiquitous in the Universe. Most celestial bodies, from planets to stars to galaxies, appear to be magnetized. Even intergalactic space could be threaded by a magnetic field. Cosmic magnetic fields generally play an important role. They affect […]
le 30 septembre 2022, 11h à 13h, Natalie Webb, salle Jules Verne, OMP, site Belin 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 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 […]