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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...
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...