First Detection of Polarization of the Submillimetre Diffuse Galactic Dust Emission by Archeops
Abstract
We present the first determination of the Galactic polarized emission at 353 GHz by Archeops. The data were taken during the Arctic night of February 7, 2002 after the balloon--borne instrument was launched by CNES from the Swedish Esrange base near Kiruna. In addition to the 143 GHz and 217 GHz frequency bands dedicated to CMB studies, Archeops had one 545 GHz and six 353 GHz bolometers mounted in three polarization sensitive pairs that were used for Galactic foreground studies. We present maps of the I, Q, U Stokes parameters over 17% of the sky and with a 13 arcmin resolution at 353 GHz (850 microns). They show a significant Galactic large scale polarized emission coherent on the longitude ranges [100, 120] and [180, 200] deg. with a degree of polarization at the level of 4-5%, in agreement with expectations from starlight polarization measurements. Some regions in the Galactic plane (Gem OB1, Cassiopeia) show an even stronger degree of polarization in the range 10-20%. Those findings provide strong evidence for a powerful grain alignment mechanism throughout the interstellar medium and a coherent magnetic field coplanar to the Galactic plane. This magnetic field pervades even some dense clouds. Extrapolated to high Galactic latitude, these results indicate that interstellar dust polarized emission is the major foreground for PLANCK-HFI CMB polarization measurement.
Cite
@article{arxiv.astro-ph/0306222,
title = {First Detection of Polarization of the Submillimetre Diffuse Galactic Dust Emission by Archeops},
author = {A. Benoit and P. Ade and A. Amblard and R. Ansari and E. Aubourg and S. Bargot and J. G. Bartlett and J. -Ph. Bernard and R. S. Bhatia and A. Blanchard and J. J. Bock and A. Boscaleri and F. R. Bouchet and A. Bourrachot and P. Camus and F. Couchot and P. de Bernardis and J. Delabrouille and F. -X. Desert and O. Doré and M. Douspis and L. Dumoulin and X. Dupac and P. Filliatre and P. Fosalba and K. Ganga and F. Gannaway and B. Gautier and M. Giard and Y. Giraud-Heraud and R. Gispert and L. Guglielmi and J. -Ch. Hamilton and S. Hanany and S. Henrot-Versille and J. Kaplan and G. Lagache and J. -M. Lamarre and A. E. Lange and J. F. Macias-Perez and K. Madet and B. Maffei and Ch. Magneville and D. P. Marrone and S. Masi and F. Mayet and A. Murphy and F. Naraghi and F. Nati and G. Patanchon and G. Perrin and M. Piat and N. Ponthieu and S. Prunet and J. -L. Puget and C. Renault and C. Rosset and D. Santos and A. Starobinsky and I. Strukov and R. V. Sudiwala and R. Teyssier and M. Tristram and C. Tucker and J. -C. Vanel and D. Vibert and E. Wakui and D. Yvon},
journal= {arXiv preprint arXiv:astro-ph/0306222},
year = {2009}
}
Comments
Submitted to Astron. & Astrophys., 14 pages, 12 Fig., 2 Tables