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Le 10 février 2017 De 10h30 à 12h00 Stacy McGaugh Case Western There exists an empirical scale in galaxy dynamics connecting baryons with kinematics. The mass discrepancy appears at a particular acceleration scale, and grows progressively more severe at lower accelerations....
Le 20 janvier 2017 De 10h30 à 12h00 Lorenzo POSTI Kapteyn Institute, Groningen Dynamical models play a crucial role in our understanding of the complex formation history and kinematics of galaxies. Stellar populations of different ages and chemistry typically show also...
Le 6 janvier 2017 De 10h30 à 12h00 Aurélien HEES UCLA In this talk, I will review the basic principles of General Relativity and give motivations to search for alternative theories of gravitation. Then, I will review some of the very recent tests of the gravitational...
Le 16 décembre 2016 De 10h30 à 12h00 Bronislaw Rudak Nicolaus Copernicus Astronomical Center Neutron stars are important tools used in physics, astronomy and even cosmology. Our knowledge of these objects is based mostly on the studies of pulsars and associated phenomena...
Le 9 décembre 2016 De 10h30 à 12h00 Chervin LAPORTE Columbia University The Milky Way disc is asymmetric about the midplane. The HI shows a warp, and recent star count surveys show that the disc is rippled (both in height and streaming vertical velocity): their respective...
Le 2 décembre 2016 De 10h30 à 12h00 Jenny SORCE Observatoire astronomique de Strasbourg The local Universe, may well be the best-observed volume of the Universe, it is also a disruptive factor when it comes to observe beyond it. Using positions and peculiar velocities of...
Le 25 novembre 2016 De 10h30 à 12h00 Jonathan CHARDIN Cambridge University, UK What are the main sources that reionized the inter-galactic medium during the first billion year of the Universe: the star forming galaxies or the active galactic nuclei (AGNs)? It has been...
Le 18 novembre 2016 De 10h30 à 12h00 Friedrich-Karl Thielemann, Dept. of Physics, University of Basel We discuss the astrophysical sites responsible for the nucleosynthesis of Fe-group and heavier elements, stating the present status, open problems, and possible solutions....
Le 16 novembre 2016 De 14h30 à 15h30 Chris Done, University of Durham Understanding the accretion flow in AGN has recently become an important cosmological problem as AGN feedback via winds and the jet is now known to control the star formation powered growth of galaxies....
Le 4 novembre 2016 De 10h30 à 12h00 Nicolas LEHNER Notre Dame University, USA L’existence de l'éjection de gaz et des métaux hors des galaxies à très grandes échelles est bien connue depuis plusieurs décennies. L'accrétion de gaz est commune dans les simulations...