le 9 octobre 2020, 11h à 13h, Natalie WEBB, salle de Conférence 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 at high energies, […]
le 18 septembre 2020, 11h à 13h, Katia FERRIERE, salle Coriolis 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 the structure of stars […]
le 11 sep 2020 de 11h00 à 13h00, Florian DEBRAS, salle Pyrénées Depuis le printemps 2016, le satellite Juno orbite autour de Jupiter et mesure avec une incroyable précision des observables telles que le champ magnétique, les émissions radios ou le champ de gravité de la planète. Le champ gravitationnel est particulièrement intéressant car il […]
le 13 déc 2019 de 11h00 à 13h00 L’astrophysique des hautes énergies est centrée sur l’étude des astres les plus extrêmes observables dans l’Univers, et en tout premier lieu les trous noirs, mais aussi les amas de galaxies, les supernovae… Athena, le prochain grand observatoire de l’agence spatiale européenne permettra d’étudier l’Univers en rayons X, […]
le 29 nov 2019 de 11h00 à 13h00
Le 22 nov 2019 de 11h00 à 13h00 Neutron stars are the extremely dense compact remnants of supernova explosions. Their properties makes them wonderful objects to study the behaviour and composition of matter in regimes not accessible by Earth laboratories (densities beyond the nuclear densities, ~2×1014 g/ cm3). Determining the dense matter equation of state, […]
le 15 nov 2019 de 11h00 à 13h00
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 at high energies, where we detect matter at very high temperatures around black holes, neutron […]
le 18 oct 2019 de 11h00 à 13h00 Supermassive black holes (SMBHs; masses of ≳10^6M⊙) lie at the center of most (if not all) galaxies. As they grow via accretion, as active galactic nuclei (AGN), they become thousands of times brighter than the galaxies that host them. As a result, they have a dramatic impact […]