# Temperature and polarization angular power spectra of Galactic dust radiation at 353 GHz as measured by Archeops

Abstract : We present the first measurement of temperature and polarization angular power spectra of the diffuse emission of Galactic dust at 353 GHz as seen by Archeops on 20% of the sky. The temperature angular power spectrum is compatible with that provided by the extrapolation to 353 GHz of IRAS and DIRBE maps using \cite{fds} model number 8. For Galactic latitudes $|b| \geq 5$ deg we report a 4 sigma detection of large scale ($3\leq \ell \leq 8$) temperature-polarization cross-correlation $(\ell+1)C_\ell^{TE}/2\pi = 76\pm 21 \mu\rm{K_{RJ}}^2$ and set upper limits to the $E$ and $B$ modes at $11 \mu\rm{K_{RJ}}^2$. For Galactic latitudes $|b| \geq 10$ deg, on the same angular scales, we report a 2 sigma detection of temperature-polarization cross-correlation $(\ell+1)C_\ell^{TE}/2\pi = 24\pm 13 \mu\rm{K_{RJ}}^2$. These results are then extrapolated to 100 GHz to estimate the contamination in CMB measurements by polarized diffuse Galactic dust emission. The $TE$ signal is then $1.7\pm0.5$ and $0.5\pm0.3 \mu\rm{K^2_{CMB}}$ for $|b| \geq 5$ and 10 deg. respectively. The upper limit on $E$ and $B$ becomes $0.2 \mu\rm{K^2_{CMB}} (2\sigma)$. If polarized dust emission at higher Galactic latitude cuts is similar to the one we report here, then dust polarized radiation will be a major foreground for determining the polarization power spectra of the CMB at high frequencies above 100 GHz.
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Article dans une revue
Astronomy and Astrophysics - A&A, EDP Sciences, 2005, 444, pp.327-336. <10.1051/0004-6361:20052715>
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http://hal.in2p3.fr/in2p3-00023663
Contributeur : Simone Lantz <>
Soumis le : mardi 12 décembre 2006 - 13:11:53
Dernière modification le : mercredi 4 janvier 2017 - 16:23:49

### Citation

N. Ponthieu, J.F. Macias-Perez, M. Tristram, P. Ade, A. Amblard, et al.. Temperature and polarization angular power spectra of Galactic dust radiation at 353 GHz as measured by Archeops. Astronomy and Astrophysics - A&A, EDP Sciences, 2005, 444, pp.327-336. <10.1051/0004-6361:20052715>. <in2p3-00023663>

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