2004A&A...424..571B

Query : 2004A&A...424..571B

2004A&A...424..571B - Astronomy and Astrophysics, volume 424571-582 (2004/9-3)

First detection of polarization of the submillimetre diffuse galactic dust emission by Archeops.

BENOIT A., ADE P., AMBLARD A., ANSARI R., AUBOURG E., BARGOT S., BARTLETT J.G., BERNARD J.-P., BHATIA R.S., BLANCHARD A., BOCK J.J., BOSCALERI A., BOUCHET F.R., BOURRACHOT A., CAMUS P., COUCHOT F., DE BERNARDIS P., DELABROUILLE J., DESERT F.-X., DORE O., DOUSPIS M., DUMOULIN L., DUPAC X., FILLIATRE P., FOSALBA P., GANGA K., GANNAWAY F., GAUTIER B., GIARD M., GIRAUD-HERAUD Y., GISPERT R., GUGLIELMI L., HAMILTON J.-C., HANANY S., HENROT-VERSILLE S., KAPLAN J., LAGACHE G., LAMARRE J.-M., LANGE A.E., MACIAS-PEREZ J.F., MADET K., MAFFEI B., MAGNEVILLE C., MARRONE D.P., MASI S., MAYET F., MURPHY A., NARAGHI F., NATI F., PATANCHON G., PERRIN G., PIAT M., PONTHIEU N., PRUNET S., PUGET J.-L., RENAULT C., ROSSET C., SANTOS D., STAROBINSKY A., STRUKOV I., SUDIWALA R.V., TEYSSIER R., TRISTRAM M., TUCKER C., VANEL J.-C., VIBERT D., WAKUI E. and YVON D.

Abstract (from CDS):

We present the first determination of the Galactic polarized emission at 353GHz 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 143GHz and 217GHz frequency bands dedicated to CMB studies, Archeops had one 545GHz and six 353GHz 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 353GHz (850µm). 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%. These 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 measurements.

Abstract Copyright: ∼

Journal keyword(s): cosmology: cosmic microwave background - cosmology: observations - ISM: dust, extinction - polarization - submillimeter

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NAME Cyg Complex reg 20 32 +45.0           ~ 667 0

Query : 2004A&A...424..571B

Basic data :
NAME Cyg Complex -- Region defined in the Sky
Other object types: otypes_help 		reg ()
ICRS coord. (ep=J2000) : 		20 32 00.0 +45 00 00 [ ] E ~
FK4 coord. (ep=B1950 eq=1950) : 		20 30 18.9 +44 49 46 [ ]
Gal coord. (ep=J2000) : 		083.0584 +03.1569 [ ]
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Identifiers (3) :
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NAME Cyg Complex NAME Cyg Region NAME Cygnus Region

References (667 between 1850 and 2026) (Total 667)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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