29 janvier 2018
Observations of Galactic dust are a highlight and a lasting legacy of the Planck space mission.
Spectacular images combining the intensity of dust emission with the texture derived
from polarization data have received world-wide attention and become part of the general scientific
knowledge. Beyond this popular success, the dust maps are an immense step forward
for Galactic astrophysics, greatly superseding earlier observations. Planck has provided us with the data
needed to statistically characterize the structure of the Galactic magnetic field and its coupling with
interstellar matter and turbulence. Planck multi-frequency observations have also opened a new perspective
on interstellar dust, upsetting existing models. Futrhermore, the astrophysics of dust emission has
become inter-connected to a paramount objective of observational cosmology: the quest for curl-like
(B-mode) polarization of the cosmic microwave background expected to arise from primordial
gravitational waves produced during the inflation era in the very early Universe. I will introduce
these science topics and highlight key results and perspectives of on-going research.
Ecole Normale Superieure, Paris, France