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arXiv · 1409.5746

Planck intermediate results. XXXI. Microwave survey of Galactic supernova remnants

Planck Collaboration·M. Arnaud·M. Ashdown·F. Atrio-Barandela·J. Aumont·C. Baccigalupi·A. J. Banday·R. B. Barreiro·E. Battaner·K. Benabed·A. Benoit-Lévy·J. -P. Bernard·M. Bersanelli·P. Bielewicz·J. Bobin·J. R. Bond·J. Borrill·F. R. Bouchet·C. L. Brogan·C. Burigana·J. -F. Cardoso·A. Catalano·A. Chamballu·H. C. Chiang·P. R. Christensen·S. Colombi·L. P. L. Colombo·B. P. Crill·A. Curto·F. Cuttaia·R. D. Davies·R. J. Davis·P. de Bernardis·A. de Rosa·G. de Zotti·J. Delabrouille·F. -X. Désert·C. Dickinson·J. M. Diego·S. Donzelli·O. Doré·X. Dupac·T. A. Enßlin·H. K. Eriksen·F. Finelli·O. Forni·M. Frailis·A. A. Fraisse·E. Franceschi·S. Galeotta·K. Ganga·M. Giard·Y. Giraud-Héraud·J. González-Nuevo·K. M. Górski·A. Gregorio·A. Gruppuso·F. K. Hansen·D. L. Harrison·C. Hernández-Monteagudo·D. Herranz·S. R. Hildebrandt·M. Hobson·W. A. Holmes·K. M. Huffenberger·A. H. Jaffe·T. R. Jaffe·E. Keihänen·R. Keskitalo·T. S. Kisner·R. Kneissl·J. Knoche·M. Kunz·H. Kurki-Suonio·A. Lähteenmäki·J. -M. Lamarre·A. Lasenby·C. R. Lawrence·R. Leonardi·M. Liguori·P. B. Lilje·M. Linden-Vørnle·M. López-Caniego·P. M. Lubin·D. Maino·M. Maris·D. J. Marshall·P. G. Martin·E. Martínez-González·S. Masi·S. Matarrese·P. Mazzotta·A. Melchiorri·L. Mendes·A. Mennella·M. Migliaccio·M. -A. Miville-Deschênes·A. Moneti·L. Montier·G. Morgante

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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 emission 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. A single power law, as predicted for a population of relativistic particles with energy distribution that extends continuously to high energies, 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, $S_\nu\propto\nu^{-\alpha}$, with the spectral index, alpha, increasing by 0.5-1 above a break frequency in the range 10-60 GHz. The break could be due to synchrotron losses.

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Planck Collaboration, M. Arnaud, M. Ashdown, F. Atrio-Barandela, J. Aumont, C. Baccigalupi, A. J. Banday, R. B. Barreiro, E. Battaner, K. Benabed, A. Benoit-Lévy, J. -P. Bernard, M. Bersanelli, P. Bielewicz, J. Bobin, J. R. Bond, J. Borrill, F. R. Bouchet, C. L. Brogan, C. Burigana, J. -F. Cardoso, A. Catalano, A. Chamballu, H. C. Chiang, P. R. Christensen, S. Colombi, L. P. L. Colombo, B. P. Crill, A. Curto, F. Cuttaia, R. D. Davies, R. J. Davis, P. de Bernardis, A. de Rosa, G. de Zotti, J. Delabrouille, F. -X. Désert, C. Dickinson, J. M. Diego, S. Donzelli, O. Doré, X. Dupac, T. A. Enßlin, H. K. Eriksen, F. Finelli, O. Forni, M. Frailis, A. A. Fraisse, E. Franceschi, S. Galeotta, K. Ganga, M. Giard, Y. Giraud-Héraud, J. González-Nuevo, K. M. Górski, A. Gregorio, A. Gruppuso, F. K. Hansen, D. L. Harrison, C. Hernández-Monteagudo, D. Herranz, S. R. Hildebrandt, M. Hobson, W. A. Holmes, K. M. Huffenberger, A. H. Jaffe, T. R. Jaffe, E. Keihänen, R. Keskitalo, T. S. Kisner, R. Kneissl, J. Knoche, M. Kunz, H. Kurki-Suonio, A. Lähteenmäki, J. -M. Lamarre, A. Lasenby, C. R. Lawrence, R. Leonardi, M. Liguori, P. B. Lilje, M. Linden-Vørnle, M. López-Caniego, P. M. Lubin, D. Maino, M. Maris, D. J. Marshall, P. G. Martin, E. Martínez-González, S. Masi, S. Matarrese, P. Mazzotta, A. Melchiorri, L. Mendes, A. Mennella, M. Migliaccio, M. -A. Miville-Deschênes, A. Moneti, L. Montier, G. Morgante. 2014-09-19. Planck intermediate results. XXXI. Microwave survey of Galactic supernova remnants. https://doi.org/10.1051/0004-6361%2F201425022

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