Planck intermediate results. XLVIII. Disentangling Galactic dust emission and cosmic infrared background anisotropies
Journal
Date Issued
2016
Author(s)
Planck Collaboration
•
Aghanim, N.
•
Ashdown, M.
•
Aumont, J.
•
Baccigalupi, C.
•
Ballardini, M.
•
Banday, A. J.
•
Barreiro, R. B.
•
Bartolo, N.
•
Basak, S.
•
Benabed, K.
•
Bernard, J. -P.
•
Bersanelli, M.
•
Bielewicz, P.
•
Bonavera, L.
•
Bond, J. R.
•
Borrill, J.
•
Bouchet, F. R.
•
Boulanger, F.
•
•
Calabrese, E.
•
Cardoso, J. -F.
•
Carron, J.
•
Chiang, H. C.
•
Colombo, L. P. L.
•
Comis, B.
•
Couchot, F.
•
Coulais, A.
•
Crill, B. P.
•
Curto, A.
•
•
de Bernardis, P.
•
de Zotti, G.
•
Delabrouille, J.
•
Di Valentino, E.
•
Dickinson, C.
•
Diego, J. M.
•
Doré, O.
•
Douspis, M.
•
Ducout, A.
•
Dupac, X.
•
Dusini, S.
•
Elsner, F.
•
Enßlin, T. A.
•
Eriksen, H. K.
•
Falgarone, E.
•
Fantaye, Y.
•
•
Forastieri, F.
•
•
Fraisse, A. A.
•
•
Frolov, A.
•
•
Galli, S.
•
Ganga, K.
•
Génova-Santos, R. T.
•
Gerbino, M.
•
Ghosh, T.
•
Giraud-Héraud, Y.
•
González-Nuevo, J.
•
Górski, K. M.
•
•
Gudmundsson, J. E.
•
Hansen, F. K.
•
Helou, G.
•
Henrot-Versillé, S.
•
Herranz, D.
•
Hivon, E.
•
Huang, Z.
•
Jaffe, A. H.
•
Jones, W. C.
•
Keihänen, E.
•
Keskitalo, R.
•
Kiiveri, K.
•
Kisner, T. S.
•
Krachmalnicoff, N.
•
Kunz, M.
•
Kurki-Suonio, H.
•
Lamarre, J. -M.
•
Langer, M.
•
Lasenby, A.
•
Lattanzi, M.
•
Lawrence, C. R.
•
Le Jeune, M.
•
Levrier, F.
•
Lilje, P. B.
•
Lilley, M.
•
Lindholm, V.
•
López-Caniego, M.
•
Ma, Y. -Z.
•
Macías-Pérez, J. F.
•
•
Maino, D.
•
Mandolesi, N.
•
Mangilli, A.
•
•
Martin, P. G.
•
Martínez-González, E.
•
Matarrese, S.
•
Mauri, N.
•
McEwen, J. D.
•
Melchiorri, A.
•
Mennella, A.
•
Migliaccio, M.
•
Miville-Deschênes, M. -A.
•
Molinari, D.
•
Moneti, A.
•
Montier, L.
•
•
Moss, A.
•
Natoli, P.
•
Oxborrow, C. A.
•
Pagano, L.
•
•
Patanchon, G.
•
Perdereau, O.
•
Perotto, L.
•
Pettorino, V.
•
Piacentini, F.
•
Plaszczynski, S.
•
Polastri, L.
•
Polenta, G.
•
Puget, J. -L.
•
Rachen, J. P.
•
Racine, B.
•
Reinecke, M.
•
Remazeilles, M.
•
Renzi, A.
•
Rocha, G.
•
Rosset, C.
•
•
Roudier, G.
•
Rubiño-Martín, J. A.
•
Ruiz-Granados, B.
•
•
•
Savelainen, M.
•
Scott, D.
•
Sirignano, C.
•
Sirri, G.
•
Soler, J. D.
•
Spencer, L. D.
•
Suur-Uski, A. -S.
•
Tauber, J. A.
•
•
Tenti, M.
•
Toffolatti, L.
•
Tomasi, M.
•
Tristram, M.
•
•
Valiviita, J.
•
Van Tent, F.
•
Vielva, P.
•
•
Vittorio, N.
•
Wandelt, B. D.
•
Wehus, I. K.
•
•
Zonca, A.
Abstract
Using the Planck 2015 data release (PR2) temperature maps, we separate Galactic thermal dust emission from cosmic infrared background (CIB) anisotropies. For this purpose, we implement a specifically tailored component-separation method, the so-called generalized needlet internal linear combination (GNILC) method, which uses spatial information (the angular powerspectra) to disentangle the Galactic dust emission and CIB anisotropies. We produce significantly improved all-sky maps of Planck thermal dust emission, with reduced CIB contamination, at 353, 545, and 857 GHz. By reducing the CIB contamination of the thermal dust maps, we provide more accurate estimates of the local dust temperature and dust spectral index over the sky with reduced dispersion, especially at high Galactic latitudes above b = ±20°. We find that the dust temperature is T = (19.4 ± 1.3) K and the dust spectral index is β = 1.6 ± 0.1 averaged over the whole sky, while T = (19.4 ± 1.5) K and β = 1.6 ± 0.2 on 21% of the sky at high latitudes. Moreover, subtracting the new CIB-removed thermal dust maps from the CMB-removed Planck maps gives access to the CIB anisotropies over 60% of the sky at Galactic latitudes |b| > 20°. Because they are a significant improvement over previous Planck products, the GNILC maps are recommended for thermal dust science. The new CIB maps can be regarded as indirect tracers of the dark matter and they are recommended for exploring cross-correlations with lensing and large-scale structure optical surveys. The reconstructed GNILC thermal dust and CIB maps are delivered as Planck products.
Volume
596
Start page
A109
Issn Identifier
0004-6361
Ads BibCode
2016A&A...596A.109P
Rights
open.access
File(s)![Thumbnail Image]()
![Thumbnail Image]()
Loading...
Name
1605.09387.pdf
Description
preprint
Size
11.1 MB
Format
Adobe PDF
Checksum (MD5)
ad8bec6bde6de1d0fc2793a7cb96c5ea
Loading...
Name
25312-aa29022-16_P01.pdf
Description
Miur
Size
8.58 MB
Format
Adobe PDF
Checksum (MD5)
e0e1ca2c962a3f68d56818f36a1b89f7