Planck intermediate results: XLVIII. Disentangling Galactic dust emission and cosmic infrared background anisotropies

N. Aghanim; M. Ashdown; J. Aumont; C. Baccigalupi; M. Ballardini; A. J. Banday; R. B. Barreiro; N. Bartolo; S. Basak; K. Benabed; J. P. Bernard; M. Bersanelli; P. Bielewicz; L. Bonavera; J. R. Bond; J. Borrill; F. R. Bouchet; F. Boulanger; C. Burigana; E. Calabrese; J. F. Cardoso; J. Carron; H. C. Chiang; L. P.L. Colombo; B. Comis; F. Couchot; A. Coulais; B. P. Crill; A. Curto; F. Cuttaia; P. De Bernardis; G. De Zotti; J. Delabrouille; E. Di Valentino; C. Dickinson; J. M. Diego; O. Doré; M. Douspis; A. Ducout; X. Dupac; S. Dusini; F. Elsner; T. A. Enßlin; H. K. Eriksen; E. Falgarone; Y. Fantaye; F. Finelli; F. Forastieri; M. Frailis; A. A. Fraisse; E. Franceschi; A. Frolov; S. Galeotta; S. Galli; K. Ganga; R. T. Génova-Santos; M. Gerbino; T. Ghosh; Y. Giraud-Héraud; J. González-Nuevo; K. M. Górski; A. Gruppuso; J. E. Gudmundsson; F. K. Hansen; G. Helou; S. Henrot-Versillé; D. Herranz; E. Hivon; Z. Huang; A. H. Jaffe; W. C. Jones; E. Keihänen; R. Keskitalo; K. Kiiveri; T. S. Kisner; N. Krachmalnicoff; M. Kunz; H. Kurki-Suonio; J. M. Lamarre; M. Langer; A. Lasenby; M. Lattanzi; C. R. Lawrence; M. Le Jeune; F. Levrier; P. B. Lilje; M. Lilley; V. Lindholm; M. López-Caniego; Y. Z. Ma; J. F. MacIás-Pérez; G. Maggio; D. Maino; N. Mandolesi; A. Mangilli; M. Maris; P. G. Martin; E. Martínez-González; S. Matarrese; N. Mauri; J. D. McEwen; A. Melchiorri; A. Mennella; M. Migliaccio; M. A. Miville-Deschênes; D. Molinari; A. Moneti; L. Montier; G. Morgante; A. Moss; P. Natoli; C. A. Oxborrow; L. Pagano; D. Paoletti; G. Patanchon; O. Perdereau; L. Perotto; V. Pettorino; F. Piacentini; S. Plaszczynski; L. Polastri; G. Polenta; J. L. Puget; J. P. Rachen; B. Racine; M. Reinecke; M. Remazeilles; A. Renzi; G. Rocha; C. Rosset; M. Rossetti; G. Roudier; J. A. Rubinõ-Martín; B. Ruiz-Granados; L. Salvati; M. Sandri; M. Savelainen; D. Scott; C. Sirignano; G. Sirri; J. D. Soler; L. D. Spencer; A. S. Suur-Uski; J. A. Tauber; D. Tavagnacco; M. Tenti; L. Toffolatti; M. Tomasi; M. Tristram; T. Trombetti; J. Valiviita; F. Van Tent; P. Vielva; F. Villa; N. Vittorio; B. D. Wandelt; I. K. Wehus; A. Zacchei; A. Zonca

doi:10.1051/0004-6361/201629022

Planck intermediate results: XLVIII. Disentangling Galactic dust emission and cosmic infrared background anisotropies

N. Aghanim, M. Ashdown, J. Aumont, C. Baccigalupi, M. Ballardini, A. J. Banday, R. B. Barreiro, N. Bartolo, S. Basak, K. Benabed, J. P. Bernard, M. Bersanelli, P. Bielewicz, L. Bonavera, J. R. Bond, J. Borrill, F. R. Bouchet, F. Boulanger, C. Burigana, E. CalabreseJ. F. Cardoso, J. Carron, H. C. Chiang, L. P.L. Colombo, B. Comis, F. Couchot, A. Coulais, B. P. Crill, A. Curto, F. Cuttaia, P. De Bernardis, G. De Zotti, J. Delabrouille, E. Di Valentino, C. Dickinson, J. M. Diego, O. Doré, M. Douspis, A. Ducout, X. Dupac, S. Dusini, F. Elsner, T. A. Enßlin, H. K. Eriksen, E. Falgarone, Y. Fantaye, F. Finelli, F. Forastieri, M. Frailis, A. A. Fraisse, E. Franceschi, A. Frolov, S. Galeotta, S. Galli, K. Ganga, R. T. Génova-Santos, M. Gerbino, T. Ghosh, Y. Giraud-Héraud, J. González-Nuevo, K. M. Górski, A. Gruppuso, J. E. Gudmundsson, F. K. Hansen, G. Helou, S. Henrot-Versillé, D. Herranz, E. Hivon, Z. Huang, A. H. Jaffe, W. C. Jones, E. Keihänen, R. Keskitalo, K. Kiiveri, T. S. Kisner, N. Krachmalnicoff, M. Kunz, H. Kurki-Suonio, J. M. Lamarre, M. Langer, A. Lasenby, M. Lattanzi, C. R. Lawrence, M. Le Jeune, F. Levrier, P. B. Lilje, M. Lilley, V. Lindholm, M. López-Caniego, Y. Z. Ma, J. F. MacIás-Pérez, G. Maggio, D. Maino, N. Mandolesi, A. Mangilli, M. Maris, P. G. Martin, E. Martínez-González, S. Matarrese, N. Mauri, J. D. McEwen, A. Melchiorri, A. Mennella, M. Migliaccio, M. A. Miville-Deschênes, D. Molinari, A. Moneti, L. Montier, G. Morgante, A. Moss, P. Natoli, C. A. Oxborrow, L. Pagano, D. Paoletti, G. Patanchon, O. Perdereau, L. Perotto, V. Pettorino, F. Piacentini, S. Plaszczynski, L. Polastri, G. Polenta, J. L. Puget, J. P. Rachen, B. Racine, M. Reinecke, M. Remazeilles, A. Renzi, G. Rocha, C. Rosset, M. Rossetti, G. Roudier, J. A. Rubinõ-Martín, B. Ruiz-Granados, L. Salvati, M. Sandri, M. Savelainen, D. Scott, C. Sirignano, G. Sirri, J. D. Soler, L. D. Spencer, A. S. Suur-Uski, J. A. Tauber, D. Tavagnacco, M. Tenti, L. Toffolatti, M. Tomasi, M. Tristram, T. Trombetti, J. Valiviita, F. Van Tent, P. Vielva, F. Villa, N. Vittorio, B. D. Wandelt, I. K. Wehus, A. Zacchei, A. Zonca

Physics

Research output: Contribution to journal › Article › peer-review

127 Scopus citations

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.

Original language	English (US)
Article number	A109
Journal	Astronomy and Astrophysics
Volume	596
DOIs	https://doi.org/10.1051/0004-6361/201629022
State	Published - Dec 1 2016

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

Keywords

Cosmology: observations
Dust, extinction
ISM: general
Infrared: diffuse background
Large-scale structure of Universe
Methods: data analysis

Access to Document

10.1051/0004-6361/201629022

Cite this

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., Burigana, C., ... Zonca, A. (2016). Planck intermediate results: XLVIII. Disentangling Galactic dust emission and cosmic infrared background anisotropies. Astronomy and Astrophysics, 596, Article A109. https://doi.org/10.1051/0004-6361/201629022

@article{83b6c7142a4d4ccf9e09cf27961c494a,

title = "Planck intermediate results: XLVIII. Disentangling Galactic dust emission and cosmic infrared background anisotropies",

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.",

keywords = "Cosmology: observations, Dust, extinction, ISM: general, Infrared: diffuse background, Large-scale structure of Universe, Methods: data analysis",

author = "N. Aghanim and M. Ashdown and J. Aumont and C. Baccigalupi and M. Ballardini and Banday, {A. J.} and Barreiro, {R. B.} and N. Bartolo and S. Basak and K. Benabed and Bernard, {J. P.} and M. Bersanelli and P. Bielewicz and L. Bonavera and Bond, {J. R.} and J. Borrill and Bouchet, {F. R.} and F. Boulanger and C. Burigana and E. Calabrese and Cardoso, {J. F.} and J. Carron and Chiang, {H. C.} and Colombo, {L. P.L.} and B. Comis and F. Couchot and A. Coulais and Crill, {B. P.} and A. Curto and F. Cuttaia and {De Bernardis}, P. and {De Zotti}, G. and J. Delabrouille and {Di Valentino}, E. and C. Dickinson and Diego, {J. M.} and O. Dor{\'e} and M. Douspis and A. Ducout and X. Dupac and S. Dusini and F. Elsner and En{\ss}lin, {T. A.} and Eriksen, {H. K.} and E. Falgarone and Y. Fantaye and F. Finelli and F. Forastieri and M. Frailis and Fraisse, {A. A.} and E. Franceschi and A. Frolov and S. Galeotta and S. Galli and K. Ganga and G{\'e}nova-Santos, {R. T.} and M. Gerbino and T. Ghosh and Y. Giraud-H{\'e}raud and J. Gonz{\'a}lez-Nuevo and G{\'o}rski, {K. M.} and A. Gruppuso and Gudmundsson, {J. E.} and Hansen, {F. K.} and G. Helou and S. Henrot-Versill{\'e} and D. Herranz and E. Hivon and Z. Huang and Jaffe, {A. H.} and Jones, {W. C.} and E. Keih{\"a}nen and R. Keskitalo and K. Kiiveri and Kisner, {T. S.} and N. Krachmalnicoff and M. Kunz and H. Kurki-Suonio and Lamarre, {J. M.} and M. Langer and A. Lasenby and M. Lattanzi and Lawrence, {C. R.} and {Le Jeune}, M. and F. Levrier and Lilje, {P. B.} and M. Lilley and V. Lindholm and M. L{\'o}pez-Caniego and Ma, {Y. Z.} and MacI{\'a}s-P{\'e}rez, {J. F.} and G. Maggio and D. Maino and N. Mandolesi and A. Mangilli and M. Maris and Martin, {P. G.} and E. Mart{\'i}nez-Gonz{\'a}lez and S. Matarrese and N. Mauri and McEwen, {J. D.} and A. Melchiorri and A. Mennella and M. Migliaccio and Miville-Desch{\^e}nes, {M. A.} and D. Molinari and A. Moneti and L. Montier and G. Morgante and A. Moss and P. Natoli and Oxborrow, {C. A.} and L. Pagano and D. Paoletti and G. Patanchon and O. Perdereau and L. Perotto and V. Pettorino and F. Piacentini and S. Plaszczynski and L. Polastri and G. Polenta and Puget, {J. L.} and Rachen, {J. P.} and B. Racine and M. Reinecke and M. Remazeilles and A. Renzi and G. Rocha and C. Rosset and M. Rossetti and G. Roudier and Rubin{\~o}-Mart{\'i}n, {J. A.} and B. Ruiz-Granados and L. Salvati and M. Sandri and M. Savelainen and D. Scott and C. Sirignano and G. Sirri and Soler, {J. D.} and Spencer, {L. D.} and Suur-Uski, {A. S.} and Tauber, {J. A.} and D. Tavagnacco and M. Tenti and L. Toffolatti and M. Tomasi and M. Tristram and T. Trombetti and J. Valiviita and {Van Tent}, F. and P. Vielva and F. Villa and N. Vittorio and Wandelt, {B. D.} and Wehus, {I. K.} and A. Zacchei and A. Zonca",

note = "Publisher Copyright: {\textcopyright} 2016 ESO.",

year = "2016",

month = dec,

day = "1",

doi = "10.1051/0004-6361/201629022",

language = "English (US)",

volume = "596",

journal = "Astronomy and Astrophysics",

issn = "0004-6361",

publisher = "EDP Sciences",

}

Aghanim, N, Ashdown, M, Aumont, J, Baccigalupi, C, Ballardini, M, Banday, AJ, Barreiro, RB, Bartolo, N, Basak, S, Benabed, K, Bernard, JP, Bersanelli, M, Bielewicz, P, Bonavera, L, Bond, JR, Borrill, J, Bouchet, FR, Boulanger, F, Burigana, C, Calabrese, E, Cardoso, JF, Carron, J, Chiang, HC, Colombo, LPL, Comis, B, Couchot, F, Coulais, A, Crill, BP, Curto, A, Cuttaia, F, De Bernardis, P, De Zotti, G, Delabrouille, J, Di Valentino, E, Dickinson, C, Diego, JM, Doré, O, Douspis, M, Ducout, A, Dupac, X, Dusini, S, Elsner, F, Enßlin, TA, Eriksen, HK, Falgarone, E, Fantaye, Y, Finelli, F, Forastieri, F, Frailis, M, Fraisse, AA, Franceschi, E, Frolov, A, Galeotta, S, Galli, S, Ganga, K, Génova-Santos, RT, Gerbino, M, Ghosh, T, Giraud-Héraud, Y, González-Nuevo, J, Górski, KM, Gruppuso, A, Gudmundsson, JE, Hansen, FK, Helou, G, Henrot-Versillé, S, Herranz, D, Hivon, E, Huang, Z, Jaffe, AH, Jones, WC, Keihänen, E, Keskitalo, R, Kiiveri, K, Kisner, TS, Krachmalnicoff, N, Kunz, M, Kurki-Suonio, H, Lamarre, JM, Langer, M, Lasenby, A, Lattanzi, M, Lawrence, CR, Le Jeune, M, Levrier, F, Lilje, PB, Lilley, M, Lindholm, V, López-Caniego, M, Ma, YZ, MacIás-Pérez, JF, Maggio, G, Maino, D, Mandolesi, N, Mangilli, A, Maris, M, Martin, PG, Martínez-González, E, Matarrese, S, Mauri, N, McEwen, JD, Melchiorri, A, Mennella, A, Migliaccio, M, Miville-Deschênes, MA, Molinari, D, Moneti, A, Montier, L, Morgante, G, Moss, A, Natoli, P, Oxborrow, CA, Pagano, L, Paoletti, D, Patanchon, G, Perdereau, O, Perotto, L, Pettorino, V, Piacentini, F, Plaszczynski, S, Polastri, L, Polenta, G, Puget, JL, Rachen, JP, Racine, B, Reinecke, M, Remazeilles, M, Renzi, A, Rocha, G, Rosset, C, Rossetti, M, Roudier, G, Rubinõ-Martín, JA, Ruiz-Granados, B, Salvati, L, Sandri, M, Savelainen, M, Scott, D, Sirignano, C, Sirri, G, Soler, JD, Spencer, LD, Suur-Uski, AS, Tauber, JA, Tavagnacco, D, Tenti, M, Toffolatti, L, Tomasi, M, Tristram, M, Trombetti, T, Valiviita, J, Van Tent, F, Vielva, P, Villa, F, Vittorio, N, Wandelt, BD, Wehus, IK, Zacchei, A & Zonca, A 2016, 'Planck intermediate results: XLVIII. Disentangling Galactic dust emission and cosmic infrared background anisotropies', Astronomy and Astrophysics, vol. 596, A109. https://doi.org/10.1051/0004-6361/201629022

TY - JOUR

T1 - Planck intermediate results

T2 - XLVIII. Disentangling Galactic dust emission and cosmic infrared background anisotropies

AU - Aghanim, N.

AU - Ashdown, M.

AU - Aumont, J.

AU - Baccigalupi, C.

AU - Ballardini, M.

AU - Banday, A. J.

AU - Barreiro, R. B.

AU - Bartolo, N.

AU - Basak, S.

AU - Benabed, K.

AU - Bernard, J. P.

AU - Bersanelli, M.

AU - Bielewicz, P.

AU - Bonavera, L.

AU - Bond, J. R.

AU - Borrill, J.

AU - Bouchet, F. R.

AU - Boulanger, F.

AU - Burigana, C.

AU - Calabrese, E.

AU - Cardoso, J. F.

AU - Carron, J.

AU - Chiang, H. C.

AU - Colombo, L. P.L.

AU - Comis, B.

AU - Couchot, F.

AU - Coulais, A.

AU - Crill, B. P.

AU - Curto, A.

AU - Cuttaia, F.

AU - De Bernardis, P.

AU - De Zotti, G.

AU - Delabrouille, J.

AU - Di Valentino, E.

AU - Dickinson, C.

AU - Diego, J. M.

AU - Doré, O.

AU - Douspis, M.

AU - Ducout, A.

AU - Dupac, X.

AU - Dusini, S.

AU - Elsner, F.

AU - Enßlin, T. A.

AU - Eriksen, H. K.

AU - Falgarone, E.

AU - Fantaye, Y.

AU - Finelli, F.

AU - Forastieri, F.

AU - Frailis, M.

AU - Fraisse, A. A.

AU - Franceschi, E.

AU - Frolov, A.

AU - Galeotta, S.

AU - Galli, S.

AU - Ganga, K.

AU - Génova-Santos, R. T.

AU - Gerbino, M.

AU - Ghosh, T.

AU - Giraud-Héraud, Y.

AU - González-Nuevo, J.

AU - Górski, K. M.

AU - Gruppuso, A.

AU - Gudmundsson, J. E.

AU - Hansen, F. K.

AU - Helou, G.

AU - Henrot-Versillé, S.

AU - Herranz, D.

AU - Hivon, E.

AU - Huang, Z.

AU - Jaffe, A. H.

AU - Jones, W. C.

AU - Keihänen, E.

AU - Keskitalo, R.

AU - Kiiveri, K.

AU - Kisner, T. S.

AU - Krachmalnicoff, N.

AU - Kunz, M.

AU - Kurki-Suonio, H.

AU - Lamarre, J. M.

AU - Langer, M.

AU - Lasenby, A.

AU - Lattanzi, M.

AU - Lawrence, C. R.

AU - Le Jeune, M.

AU - Levrier, F.

AU - Lilje, P. B.

AU - Lilley, M.

AU - Lindholm, V.

AU - López-Caniego, M.

AU - Ma, Y. Z.

AU - MacIás-Pérez, J. F.

AU - Maggio, G.

AU - Maino, D.

AU - Mandolesi, N.

AU - Mangilli, A.

AU - Maris, M.

AU - Martin, P. G.

AU - Martínez-González, E.

AU - Matarrese, S.

AU - Mauri, N.

AU - McEwen, J. D.

AU - Melchiorri, A.

AU - Mennella, A.

AU - Migliaccio, M.

AU - Miville-Deschênes, M. A.

AU - Molinari, D.

AU - Moneti, A.

AU - Montier, L.

AU - Morgante, G.

AU - Moss, A.

AU - Natoli, P.

AU - Oxborrow, C. A.

AU - Pagano, L.

AU - Paoletti, D.

AU - Patanchon, G.

AU - Perdereau, O.

AU - Perotto, L.

AU - Pettorino, V.

AU - Piacentini, F.

AU - Plaszczynski, S.

AU - Polastri, L.

AU - Polenta, G.

AU - Puget, J. L.

AU - Rachen, J. P.

AU - Racine, B.

AU - Reinecke, M.

AU - Remazeilles, M.

AU - Renzi, A.

AU - Rocha, G.

AU - Rosset, C.

AU - Rossetti, M.

AU - Roudier, G.

AU - Rubinõ-Martín, J. A.

AU - Ruiz-Granados, B.

AU - Salvati, L.

AU - Sandri, M.

AU - Savelainen, M.

AU - Scott, D.

AU - Sirignano, C.

AU - Sirri, G.

AU - Soler, J. D.

AU - Spencer, L. D.

AU - Suur-Uski, A. S.

AU - Tauber, J. A.

AU - Tavagnacco, D.

AU - Tenti, M.

AU - Toffolatti, L.

AU - Tomasi, M.

AU - Tristram, M.

AU - Trombetti, T.

AU - Valiviita, J.

AU - Van Tent, F.

AU - Vielva, P.

AU - Villa, F.

AU - Vittorio, N.

AU - Wandelt, B. D.

AU - Wehus, I. K.

AU - Zacchei, A.

AU - Zonca, A.

PY - 2016/12/1

Y1 - 2016/12/1

N2 - 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.

AB - 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.

KW - Cosmology: observations

KW - Dust, extinction

KW - ISM: general

KW - Infrared: diffuse background

KW - Large-scale structure of Universe

KW - Methods: data analysis

UR - http://www.scopus.com/inward/record.url?scp=85006371472&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85006371472&partnerID=8YFLogxK

U2 - 10.1051/0004-6361/201629022

DO - 10.1051/0004-6361/201629022

M3 - Article

AN - SCOPUS:85006371472

SN - 0004-6361

VL - 596

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

M1 - A109

ER -

Planck intermediate results: XLVIII. Disentangling Galactic dust emission and cosmic infrared background anisotropies

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