학술논문
Planck intermediate results
Document Type
article
Author
Arnaud, M; Ashdown, M; Atrio-Barandela, F; Aumont, J; Baccigalupi, C; Banday, AJ; Barreiro, RB; Battaner, E; Benabed, K; Benoit-Lévy, A; Bernard, J-P; Bersanelli, M; Bielewicz, P; Bobin, J; Bond, JR; Borrill, J; Bouchet, FR; Brogan, CL; Burigana, C; Cardoso, J-F; Catalano, A; Chamballu, A; Chiang, HC; Christensen, PR; Colombi, S; Colombo, LPL; Crill, BP; Curto, A; Cuttaia, F; Davies, RD; Davis, RJ; de Bernardis, P; de Rosa, A; de Zotti, G; Delabrouille, J; Désert, F-X; Dickinson, C; Diego, JM; Donzelli, S; Doré, O; Dupac, X; Enßlin, TA; Eriksen, HK; Finelli, F; Forni, O; Frailis, M; Fraisse, AA; Franceschi, E; Galeotta, S; Ganga, K; Giard, M; Giraud-Héraud, Y; González-Nuevo, J; Górski, KM; Gregorio, A; Gruppuso, A; Hansen, FK; Harrison, DL; Hernández-Monteagudo, C; Herranz, D; Hildebrandt, SR; Hobson, M; Holmes, WA; Huffenberger, KM; Jaffe, AH; Jaffe, TR; Keihänen, E; Keskitalo, R; Kisner, TS; Kneissl, R; Knoche, J; Kunz, M; Kurki-Suonio, H; Lähteenmäki, A; Lamarre, J-M; Lasenby, A; Lawrence, CR; Leonardi, R; Liguori, M; Lilje, PB; Linden-Vørnle, M; López-Caniego, M; Lubin, PM; Maino, D; Maris, M; Marshall, DJ; Martin, PG; Martínez-González, E; Masi, S; Matarrese, S; Mazzotta, P; Melchiorri, A; Mendes, L; Mennella, A; Migliaccio, M; Miville-Deschênes, M-A; Moneti, A; Montier, L; Morgante, G; Mortlock, D
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Subject
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Abstract
The all-sky Planck survey in 9 frequency bands was used to search for emission from all 274 known Galactic supernova remnants. Of these, 16 were detected in at least two Planck frequencies. The radio-through-microwave spectral energy distributions were compiled to determine the mechanism for microwave emission. In only one case, IC 443, is there high-frequency emission clearly from dust associated with the supernova remnant. In all cases, the low-frequency emission is from synchrotron radiation. As predicted for a population of relativistic particles with energy distribution that extends continuously to high energies, a single power law is evident for many sources, including the Crab and PKS 1209-51/52. A decrease in flux density relative to the extrapolation of radio emission is evident in several sources. Their spectral energy distributions can be approximated as broken power laws, Sν ∝ ν-α, with the spectral index, α, increasing by 0.5-1 above a break frequency in the range 10-60 GHz. The break could be due to synchrotron losses.