Seminar

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18 February 2020

How and where are the Heavy Elements made in the Cosmos?

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....

18 February 2020

The nature of the accretion flow in Active Galactic Nuclei

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....

18 February 2020

A la recherche de l’accrétion de gaz par les 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...

18 February 2020

Direct Imaging of New Worlds with SPHERE at VLT

Le 18 octobre 2016 De 14h00 à 16h00 Gael Chauvin, Université de Grenoble With the development of high contrast imaging techniques and instruments, vast efforts have been devoted during the past decades to detect and characterize lighter, cooler and closer companions to nearby...

18 February 2020

Magnetic reconnection in large aspect ratio current sheets

Le 14 octobre 2016 De 10h30 à 12h00 Daniele Del Sarto, Université de Lorraine, Institut Jean Lamour, Nancy Magnetic reconnection, process at the basis of several phenomena observed in natural and laboratory plasmas (e.g., solar flares, magnetic storms in the magnetosphere,...

18 February 2020

Accretion-driven outbursts in the context of massive star formation

Le 7 octobre 2016 De 10h30 à 12h00 Dominique Meyer, Institut für Astronomie und Astrophysik, Universität Tübingen Accretion-driven luminosity outbursts are a vivid manifestation of variable mass accretiononto protostars. They are known as the so-called FU Orionis phenomenon...

18 February 2020

Secular evolution in discrete self-gravitating stellar discs

Le 23 septembre 2016 De 10h30 à 12h00 Jean-Baptiste FOUVRY IAP Fluctuations in a stellar system's gravitational field cause the orbits of stars to evolve. These fluctuations can either originate from external perturbers (e.g. flybys), or from the intrinsic discreteness of...

18 February 2020

The structure of galactic thick disks

Le 9 septembre 2016 De 10h30 à 12h00 Marie MARTIG MPIA Heidelberg   Thick disks are ubiquitous in nearby spiral galaxies, and many mechanisms have been proposed to explain their formation. I will first use a suite of zoom cosmological simulations to explore the connection...