Vorträge, Seminare, Ereignisse

Abstract
High-contrast imaging of exoplanets and circumstellar disks: from the instrument to the data analysis.

Faustine Cantalloube (MPIA)

High-contrast imaging is one of the most challenging observational techniques in the visible infrared. It requires the best adaptive optics systems installed on the largest ground-based telescopes, advanced coronagraphs design, and dedicated image processing techniques. Thanks to the second generation of high-contrast instruments, such as VLT/SPHERE partially developed at MPIA, we now understand subtle effects stemming from the atmospheric turbulence and interacting all the way through the instrument, which drive the final performance of the instrument. This knowledge turns out to be of great interest in the context of the design of the future 40-m class telescopes instrument suite. In this talk, I will give an overview of exoplanet imaging from an instrumental perspective.

Abstract
Exploring the metal-poor inner Milky Way with the Pristine survey

Anke Arentsen (Strasbourg)

Old, metal-poor stars can teach us about the First Stars and about the early formation and evolution of the Milky Way. A prediction of simulations is that the fraction of metal-poor stars that are very old is highest towards the centres of galaxies: in their bulges. However, searching for metal-poor stars in the bulge region of the Milky Way faces many challenges, so much is unknown about the properties of the metal-poor inner Galaxy. In this talk, I will introduce the Pristine Inner Galaxy Survey (PIGS) which has reached unprecedented efficiency in finding very metal-poor stars in the Galactic bulge region. I will present recent PIGS results on the chemistry (focusing on carbon-enhanced metal-poor stars) and the kinematics of the metal-poor inner Galaxy, and discuss what they can teach us about this ancient component of the Milky Way. \;

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