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Le 7 avril 2017 De 10h30 à 12h00 Mark Lovell MPIA Heidelberg It is well known that the number of Local Group galaxies is much smaller than the number density of dark matter haloes predicted by N-body cold dark matter simulations, and these same simulations often predict...
Le 31 mars 2017 De 10h30 à 12h00 Flavien Kiefer IAP Le jeune système planétaire entourant Beta Pictoris contient de nombreux petits corps actifs. Les observations spectroscopiques de cette étoile révèlent en effet un taux élevé de transits de petits corps en...
Le 24 mars 2017 De 10h30 à 12h00 Arjen van der Wel MPIA Heidelberg We have precise constraints on the evolution of the cosmic stellar mass density and how stars are distributed over galaxies with different masses, sizes and morphologies. The next challenge is to decipher the...
Le 17 mars 2017 De 10h30 à 12h00 Lasha Berezhiani Princeton I will talk about a novel theory of dark matter superfluidity that matches the success of LCDM model on cosmological scales while simultaneously reproducing the MOND phenomenology on galactic...
Le 3 mars 2017 De 10h30 à 12h00 Armen Sedrakian Frankfurt Institute for Advanced Studies Cooling of neutron stars is a sensitive probe of the composition of their interior. I will discuss recent developments towards understanding of the modifications of the "standard"...
Le 24 février 2017 De 10h30 à 12h00 Matthieu Portail MPE Garching The Milky Way is a Rosetta stone for understanding how massive disk galaxies form and evolve. It is currently the subject of an extraordinary observational effort, providing data on a star-by-star basis for...
Le 17 février 2017 De 10h30 à 12h00 Myriam Rodrigues Observatoire de Paris In the Λ-CDM paradigm, the Universe is structured at large scales by the hierarchical assembly of dark matter haloes. To be a coherent framework, this cosmological model has to predict the evolution...
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...