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18 février 2020

Gravitational probes of dark matter

Le 27 septembre 2019 De 10h30 à 12h00 Justin Read University of Surrey   Dark matter makes up most of the mass of the Universe but remains mysterious. I discuss recent progress in constraining its properties by measuring its distribution in the Universe from tiny dwarf...

18 février 2020

Assembling the Milky Way

Le 20 septembre 2019 De 10h30 à 12h00 Florent Renaud Lund   In the Gaia era, and with more and more complete surveys, the assembly of the Milky Way is being scrutinized with an always increasing accuracy. The kinematic and chemical properties of stellar populations are...

18 février 2020

La mission Planck et le modèle cosmologique

Le 13 septembre 2019 De 10h30 à 12h00 Jean-Loup Puget IAS/ENS   Les données de la mission Planck ont vérifié plusieurs prédictions génériques du paradigme d'inflation qui donne une base physique aux conditions initiales du modèle historique du "big  bang". Les...

18 février 2020

Magnetar birth as engine of extreme stellar explosions

Le 6 septembre 2019 De 10h30 à 12h00 Guilet Jérôme CEA The birth of a neutron star with an extremely strong magnetic field, called a magnetar, has emerged as a promising scenario to power a variety of outstanding explosive events. This includes gamma-ray bursts, supernovae...

18 février 2020

Results of the Insight-HXMT X-ray Satellite and the future eXTP mission

Le 19 juillet 2019 De 10h30 à 12h00 Prof. Zhang ShuangnanInstitute of High Energy Physics, Chinese Academy of Science (Beijing) Insight-HXMT is China's first X-ray astronomy satellite and was successfully launched on June 15th, 2017. It carries three sets of collimated X-ray...

18 février 2020

Tidal stellar streams as probes of Gravity and Dark Matter

Le 5 juillet 2019 De 10h30 à 12h00 Khyati Malhan Stockholm University “Tidal stellar streams” have recently sparked burgeoning interest among the community. These structures, that are formed by the tidal disruption of globular clusters or satellite galaxies by the potential...

18 février 2020

High-mass X-ray binaries in nearby galaxies

Le 21 juin 2019 De 10h30 à 12h00 Jun Yang University of Utah The overall objective of my research is to improve understanding of the properties and structures of high-mass X-ray binary (XRB) pulsars, by bringing together a large set of observations spanning the observable...

18 février 2020

Testing weak-field gravity with wide binary stars

Le 14 juin 2019 De 10h30 à 12h00 Indranil Banik University of Bonn Binary stars separated by >3 kAU have orbital accelerations smaller than those typically experienced by stars in the outskirts of galaxies, whose galactocentric motions evince sometimes very large...