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, Suman 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 & 139 others 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, Giulia 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, Carol Anne 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

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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 languageEnglish
Article numberA109
JournalAstronomy & Astrophysics
Volume596
Number of pages26
ISSN0004-6361
DOIs
Publication statusPublished - 2016

Keywords

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

Cite this

Aghanim, N., Ashdown, M., Aumont, J., Baccigalupi, C., Ballardini, M., Banday, A. J., ... Zonca, A. (2016). Planck intermediate results: XLVIII. Disentangling Galactic dust emission and cosmic infrared background anisotropies. Astronomy & Astrophysics, 596, [A109]. https://doi.org/10.1051/0004-6361/201629022
Aghanim, N. ; Ashdown, M. ; Aumont, J. ; Baccigalupi, C. ; Ballardini, M. ; Banday, A. J. ; Barreiro, R. B. ; Bartolo, N. ; Basak, Suman ; Benabed, K. ; Bernard, J. P. ; Bersanelli, M. ; Bielewicz, P. ; Bonavera, L. ; Bond, J. R. ; Borrill, J. ; Bouchet, F. R. ; Boulanger, F. ; Burigana, C. ; 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. ; Cuttaia, F. ; De Bernardis, P. ; De Zotti, Giulia ; 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. ; Finelli, F. ; Forastieri, F. ; Frailis, M. ; Fraisse, A. A. ; Franceschi, E. ; Frolov, A. ; Galeotta, S. ; Galli, S. ; Ganga, K. ; Génova-Santos, R. T. ; Gerbino, M. ; Ghosh, T. ; Giraud-Héraud, Y. ; González-Nuevo, J. ; Górski, K. M. ; Gruppuso, A. ; 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. ; MacIás-Pérez, J. F. ; Maggio, G. ; Maino, D. ; Mandolesi, N. ; Mangilli, A. ; Maris, M. ; 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. ; Morgante, G. ; Moss, A. ; Natoli, P. ; Oxborrow, Carol Anne ; Pagano, L. ; Paoletti, D. ; 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. ; Rossetti, M. ; Roudier, G. ; Rubinõ-Martín, J. A. ; Ruiz-Granados, B. ; Salvati, L. ; Sandri, M. ; Savelainen, M. ; Scott, D. ; Sirignano, C. ; Sirri, G. ; Soler, J. D. ; Spencer, L. D. ; Suur-Uski, A. S. ; Tauber, J. A. ; Tavagnacco, D. ; Tenti, M. ; Toffolatti, L. ; Tomasi, M. ; Tristram, M. ; Trombetti, T. ; Valiviita, J. ; Van Tent, F. ; Vielva, P. ; Villa, F. ; Vittorio, N. ; Wandelt, B. D. ; Wehus, I. K. ; Zacchei, A. ; Zonca, A. / Planck intermediate results: XLVIII. Disentangling Galactic dust emission and cosmic infrared background anisotropies. In: Astronomy & Astrophysics. 2016 ; Vol. 596.
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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, 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 Suman 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}, Giulia 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, {Carol Anne} 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",
year = "2016",
doi = "10.1051/0004-6361/201629022",
language = "English",
volume = "596",
journal = "Astronomy & Astrophysics",
issn = "0004-6361",
publisher = "E D P 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 & Astrophysics, vol. 596, A109. https://doi.org/10.1051/0004-6361/201629022

Planck intermediate results: XLVIII. Disentangling Galactic dust emission and cosmic infrared background anisotropies. / Aghanim, N.; Ashdown, M.; Aumont, J.; Baccigalupi, C.; Ballardini, M.; Banday, A. J.; Barreiro, R. B.; Bartolo, N.; Basak, Suman; Benabed, K.; Bernard, J. P.; Bersanelli, M.; Bielewicz, P.; Bonavera, L.; Bond, J. R.; Borrill, J.; Bouchet, F. R.; Boulanger, F.; Burigana, C.; 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.; Cuttaia, F.; De Bernardis, P.; De Zotti, Giulia; 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.; Finelli, F.; Forastieri, F.; Frailis, M.; Fraisse, A. A.; Franceschi, E.; Frolov, A.; Galeotta, S.; Galli, S.; Ganga, K.; Génova-Santos, R. T.; Gerbino, M.; Ghosh, T.; Giraud-Héraud, Y.; González-Nuevo, J.; Górski, K. M.; Gruppuso, A.; 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.; MacIás-Pérez, J. F.; Maggio, G.; Maino, D.; Mandolesi, N.; Mangilli, A.; Maris, M.; 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.; Morgante, G.; Moss, A.; Natoli, P.; Oxborrow, Carol Anne; Pagano, L.; Paoletti, D.; 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.; Rossetti, M.; Roudier, G.; Rubinõ-Martín, J. A.; Ruiz-Granados, B.; Salvati, L.; Sandri, M.; Savelainen, M.; Scott, D.; Sirignano, C.; Sirri, G.; Soler, J. D.; Spencer, L. D.; Suur-Uski, A. S.; Tauber, J. A.; Tavagnacco, D.; Tenti, M.; Toffolatti, L.; Tomasi, M.; Tristram, M.; Trombetti, T.; Valiviita, J.; Van Tent, F.; Vielva, P.; Villa, F.; Vittorio, N.; Wandelt, B. D.; Wehus, I. K.; Zacchei, A.; Zonca, A.

In: Astronomy & Astrophysics, Vol. 596, A109, 2016.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Planck intermediate results: 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, Suman

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, Giulia

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, Carol Anne

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

Y1 - 2016

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 - Infrared: diffuse background

KW - Large-scale structure of Universe

KW - Methods: data analysis

U2 - 10.1051/0004-6361/201629022

DO - 10.1051/0004-6361/201629022

M3 - Journal article

VL - 596

JO - Astronomy & Astrophysics

JF - Astronomy & Astrophysics

SN - 0004-6361

M1 - A109

ER -