Bibcode
Planck Collaboration; Ade, P. A. R.; Aghanim, N.; Alina, D.; Aniano, G.; Armitage-Caplan, C.; Arnaud, M.; Ashdown, M.; Atrio-Barandela, F.; Aumont, J.; Baccigalupi, C.; Banday, A. J.; Barreiro, R. B.; Battaner, E.; Beichman, C.; Benabed, K.; Benoit-Lévy, A.; Bernard, J.-P.; Bersanelli, M.; Bielewicz, P.; Bock, J. J.; Bond, J. R.; Borrill, J.; Bouchet, F. R.; Boulanger, F.; Burigana, C.; Cardoso, J.-F.; Catalano, A.; Chamballu, A.; Chary, R.-R.; Chiang, H. C.; Christensen, P. R.; Colombi, S.; Colombo, L. P. L.; Combet, C.; Couchot, F.; Coulais, A.; Crill, B. P.; Curto, A.; Cuttaia, F.; Danese, L.; Davies, R. D.; Davis, R. J.; de Bernardis, P.; de Rosa, A.; de Zotti, G.; Delabrouille, J.; Désert, F.-X.; Dickinson, C.; Diego, J. M.; Donzelli, S.; Doré, O.; Douspis, M.; Dunkley, J.; Dupac, X.; Enßlin, T. A.; Eriksen, H. K.; Falgarone, E.; Fanciullo, L.; Finelli, F.; Forni, O.; Frailis, M.; Fraisse, A. A.; Franceschi, E.; Galeotta, S.; Ganga, K.; Ghosh, T.; Giard, M.; Giraud-Héraud, Y.; González-Nuevo, J.; Górski, K. M.; Gregorio, A.; Gruppuso, A.; Guillet, V.; Hansen, F. K.; Harrison, D. L.; Helou, G.; Hernández-Monteagudo, C.; Hildebrandt, S. R.; Hivon, E.; Hobson, M.; Holmes, W. A.; Hornstrup, A.; Huffenberger, K. M.; Jaffe, A. H.; Jaffe, T. R.; Jones, W. C.; Juvela, M.; Keihänen, E.; Keskitalo, R.; Kisner, T. S.; Kneissl, R.; Knoche, J.; Kunz, M.; Kurki-Suonio, H.; Lagache, G.; Lähteenmäki, A.; Lamarre, J.-M.; Lasenby, A.; Lawrence, C. R. et al.
Referencia bibliográfica
eprint arXiv:1405.0873
Advertised on:
5
2014
Número de citas
0
Número de citas referidas
0
Descripción
The Planck survey provides unprecedented full-sky coverage of the
submillimetre polarized emission from Galactic dust, bringing new
constraints on the properties of dust. The dust grains that emit the
radiation seen by Planck in the submillimetre also extinguish and
polarize starlight in the optical. Using ancillary catalogues of
interstellar polarization and extinction of starlight, we obtain the
degree of polarization, $p_V$, and the optical depth in the $V$ band to
the star, $\tau_V$. We extract the submillimetre polarized intensity,
$P_S$, and total intensity, $I_S$, measured toward these stars in the
Planck 353 GHz channel. We compare the position angle measured in the
optical with that measured at 353 GHz, and the column density measure
$E(B - V)$ with that inferred from the Planck product map of the
submillimetre dust optical depth. For those lines of sight suitable for
this comparison, we measure the polarization ratios $R_{S/V} =
(P_S/I_S)/(p_V/\tau_V)$ and $R_{P/p} = P_S / p_V$ through a correlation
analysis. We find $R_{S/V} = 4.3$ with statistical and systematic
uncertainties 0.2 and 0.4, respectively, and $R_{P/p} = 5.6$ MJy
sr$^{-1}$, with statistical and systematic uncertainties 0.2 and 0.4 MJy
sr$^{-1}$, respectively. Our estimate of $R_{S/V}$ is reasonably
compatible with current dust models, not yet very discriminating among
them. However, the observed $R_{P/p}$ is a more discriminating
diagnostic for the polarizing grain population and is not compatible
with predictions of dust models, the observations being higher by a
factor of about 2.5. These new diagnostics from Planck, including the
spectral dependence in the submillimetre, will be important for
constraining and understanding the full complexity of the grain models,
and for further interpretation of the Planck thermal dust polarization.