November 12 - 18, 2017 — IESC,
The CMB from A to Z
challenges of the CMB as a cosmological probe
Statistical characterization and modelling of Galactic
foregrounds to CMB polarization
Ecole Normale Supérieure, Paris
- Angular power spectra of Galactic foregrounds
- Frequency dependence of Galactic polarized emission
- Statistical simulations of the dust foreground to CMB polarization
- Forgerounds complexity: the interplay between dust, magnetic fields and the density structure of interstellar matter
study of Galactic foregrounds has become entwined with the
analysis of the cosmic microwave background (CMB) polarization.
On the one hand, CMB data provide new insights on the physics of the
magnetized interstellar medium (ISM), and on the other hand the
challenge of component separation binds the search for primordial
B-modes to Galactic astrophysics. Their detection is a paramount
objective of cosmology, but any claim will face a critical assessment
against alternative interpretations involving foregrounds.
I will present the current knowledge and research directions at this
interface between astrophysics and cosmology, where we seek to
characterize and model polarized foregrounds statistically to assess
and optimize component separation.
Collaboration 2015 A&A 576, 107: Planck intermediate results XXII:
Frequency dependence of dust emission in intensity and
Collaboration 2016 A&A 586, 133: Planck intermediate results. XXX.
The angular power spectrum of polarized dust emission
at intermediate and high Galactic latitudes.
Collaboration 2016 A&A 586, 141: Planck intermediate results
XXXVIII: E and B-modes of dust polarization from the magnetized
filamentary structure of the interstellar.
F., Boulanger, F., Ghosh, T. et al. 2017 A&A 603, A62, Statistical
simulations of the dust foreground to CMB polarization.