Submillimetre polarization of M82 and the Galactic Center: Implications for CMB polarimetry

Details Submillimetre polarization of M82 and the Galactic Center: Implications for CMB polarimetry Submillimetre polarization of M82 and the Galactic Center: Implications for CMB polarimetry

Mar 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aipc..609..267g&link_type=abstract

ASTROPHYSICAL POLARIZED BACKGROUNDS: Workshop on Astrophysical Polarized Backgrounds, held 9-12 October, 2001 in Bologna Italy.

Physics

4

Background Radiations, Radiation Mechanisms, Polarization, Galactic Center, Bar, Circumnuclear Matter, And Bulge, Interstellar Dust Grains, Diffuse Emission, Infrared Cirrus, Submillimeter

Scientific paper

Polarized foreground galaxies may be a contaminant in CMB polarimetry experiments. We use 850 μm maps of polarized dust emission in M82 and towards the Galactic Center to estimate the possible level of contamination. The dust grains are aligned by magnetic fields which in both cases have complex structure over large scales, and this field `tangling' reduces pnet to only 0.4%. If this is typical of luminous local galaxies, we estimate that the polarized signal in a 5 arcmin pixel centred on the galaxy would be of the order of 0.5 μK. .

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