XIIIème Ecole de Cosmologie
12 - 17 novembre 2017 IESC, Cargèse
Le CMB de A à Z
Enjeux et défis du CMB comme sonde cosmologique

 Interstellar dust as a nuisance for cosmological studies

Institut d’Astrophysique Spatiale


  1.  Galactic dust in total and polarized emission


This course on Galactic Dust is to be related to the course by F. Boulanger on the Galactic magnetic field, and  on Galactic Foregrounds.
I will present our current knowledge of interstellar dust, with a particular focus on the optical properties of dust at high latitude, in unpolarized en polarized emission. I will detail how the fluctuations of dust polarized emission is intrincated with various not-well-constrained physics : the structure and turbulence of the magnetic field, the variation of grain alignment, and the variations of dust properties, and present what we have learnt about this from Planck.


  • A general overview on interstellar dust :
    • Draine, B. T. (2004). Astrophysics of Dust in Cold Clouds. The Cold Universe, 213.
      arXiv:1502.01592 [astro-ph.CO]
  • Planck results on dust properties
    • In total (unpolarized) emission :
      • Planck 2013 results. XI. All-sky model of thermal dust emission. Astronomy and Astrophysics, 571, A11. http://doi.org/10.1051/0004-6361/201323195
      • Planck intermediate results. XXIX. All-sky dust modelling with Planck, IRAS, and WISE observations. Astronomy and Astrophysics, 586, A132. http://doi.org/10.1051/0004-6361/201424945
    • In polarized emission :
      • Planck intermediate results. XIX. An overview of the polarized thermal emission from Galactic dust. Astronomy and Astrophysics, 576, A104. http://doi.org/10.1051/0004-6361/201424082
      • Planck intermediate results. XX. Comparison of polarized thermal emission from Galactic dust with simulations of MHD turbulence. Astronomy and Astrophysics, 576, A105. http://doi.org/10.1051/00046361/201424086
      • Planck intermediate results. XXI. Comparison of polarized thermal emission from Galactic dust at 353 GHz with interstellar polarization in the visible. Astronomy and Astrophysics, 576, A106. http://doi.org/10.1051/0004-6361/201424087
      • Planck intermediate results. XXII. Frequency dependence of thermal emission from Galactic dust in intensity and polarization. Astronomy and Astrophysics, 576, A107. http://doi.org/10.1051/0004-6361/201424088
  • A dust model involving magnetic dipole emission from dust in total and polarized emission :
    • Draine, B. T., & Hensley, B. (2013). Magnetic Nanoparticles in the Interstellar Medium: Emission Spectrum and Polarization. The Astrophysical Journal, 765(2), 159. http://doi.org/10.1088/0004-637X/765/2/159
  • A recent dust model compatible with Planck data
    • V. Guillet, L. Fanciullo, L. Verstraete, F. Boulanger, A. P. Jones, M.-A. Miville-Deschênes, N. Ysard, F. Levrier, M. Alves, Dust models compatible with Planck intensity and polarization data in translucent lines of sight, 2017, https://arxiv.org/abs/1710.04598