The Interstellar dust : what can we learn from its continuum and polarized emission.

Séminaire IPAG de Maud Galametz (CEA Saclay), jeudi 28 mars 2019 à 11h30, salle Manuel Forestini

The interstellar dust is a key galaxy component and a strong diagnostic tool to trace the lifecycle of matter in the ISM. Herschel and Planck have revolutionised our understanding of dust properties in our own Galaxy and nearby galaxies. Recent observations and comparisons of AV estimates from the dust with optical estimates in the Galaxy have highlighted the need of a new recalibration of our dust reservoirs. In this seminar, I will discuss how our knowledge of the dust composition has (...)

Lire la suite

High-angular resolution observations of protoplanetary disks around young and…evolved stars

Séminaire IPAG de Jacques Kluska (KU Leuven), jeudi 21 mars 2019 à 11h00, salle Manuel Forestini

Protoplanetary disks are a byproduct of star formation and are the birth places of future planetary systems. However, besides young stars there are other objects that are surrounded by very similar disks of dust and gas : the post-AGB binaries. Despite very different formation processes, the circumbinary disks around those evolved binaries have a similar infrared excess to disks around young stars, a Keplerian rotation profile and evidence of dust processing. Altogether, those similarities (...)

Lire la suite