EAS Publications Series
Volume 23, 2007Sky Polarisation at Far-Infrared to Radio Wavelengths: The Galactic Screen before the Cosmic Microwave Background
|Page(s)||147 - 164|
|Published online||08 January 2007|
M.-A. Miville-Deschênes and F. Boulanger (eds)
EAS Publications Series, 23 (2007) 147-164
Polarized Emission from Interstellar Dust
Enrico Fermi Institute, University of Chicago, Chicago, Illinois, USA
Corresponding author: firstname.lastname@example.org
Observations of far-infrared (FIR) and submillimeter (SMM) polarized emission are used to study magnetic fields and dust grains in dense regions on the interstellar medium (ISM). These observations place constraints on models of molecular clouds, star-formation, grain alignment mechanisms, and grain size, shape, and composition. The FIR/SMM polarization is strongly dependent on wavelength. We have attributed this wavelength dependence to sampling different grain populations at different temperatures. To date, most observations of polarized emission have been in the densest regions of the ISM. Extending these observations to regions of the diffuse ISM, and to microwave frequencies, will provide additional tests of grain and alignment models. An understanding of polarized microwave emission from dust is key to an accurate measurement of the polarization of the cosmic microwave background. The microwave polarization spectrum will put limits on the contributions to polarized emission from spinning dust and vibrating magnetic dust.
© EAS, EDP Sciences, 2007
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