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arxiv: 1409.5746 · v4 · pith:EFOUKPTYnew · submitted 2014-09-19 · 🌌 astro-ph.GA

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
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K. Benabed A. Benoit-L\'evy 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. D\'esert C. Dickinson J. M. Diego S. Donzelli O. Dor\'e X. Dupac T. A. En{\ss}lin H. K. Eriksen F. Finelli O. Forni M. Frailis A. A. Fraisse E. Franceschi S. Galeotta K. Ganga M. Giard Y. Giraud-H\'eraud J. Gonz\'alez-Nuevo K. M. G\'orski A. Gregorio A. Gruppuso F. K. Hansen D. L. Harrison C. Hern\'andez-Monteagudo D. Herranz S. R. Hildebrandt M. Hobson W. A. Holmes K. M. Huffenberger A. H. Jaffe T. R. Jaffe E. Keih\"anen R. Keskitalo T. S. Kisner R. Kneissl J. Knoche M. Kunz H. Kurki-Suonio A. L\"ahteenm\"aki J.-M. Lamarre A. Lasenby C. R. Lawrence R. Leonardi M. Liguori P. B. Lilje M. Linden-V{\o}rnle M. L\'opez-Caniego P. M. Lubin D. Maino M. Maris D. J. Marshall P. G. Martin E. Mart\'inez-Gonz\'alez S. Masi S. Matarrese P. Mazzotta A. Melchiorri L. Mendes A. Mennella M. Migliaccio M.-A. Miville-Desch\^enes A. Moneti L. Montier G. Morgante D. Mortlock D. Munshi J. A. Murphy P. Naselsky F. Nati F. Noviello D. Novikov I. Novikov N. Oppermann C. A. Oxborrow L. Pagano F. Pajot R. Paladini F. Pasian M. Peel O. Perdereau F. Perrotta F. Piacentini M. Piat D. Pietrobon S. Plaszczynski E. Pointecouteau G. Polenta L. Popa G. W. Pratt J.-L. Puget J. P. Rachen W. T. Reach W. Reich M. Reinecke M. Remazeilles C. Renault J. Rho S. Ricciardi T. Riller I. Ristorcelli G. Rocha C. Rosset G. Roudier B. Rusholme M. Sandri G. Savini D. Scott V. Stolyarov D. Sutton A.-S. Suur-Uski J.-F. Sygnet J. A. Tauber L. Terenzi L. Toffolatti M. Tomasi M. Tristram M. Tucci G. Umana L. Valenziano J. Valiviita B. Van Tent P. Vielva F. Villa L. A. Wade D. Yvon A. Zacchei A. Zonca
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keywords emissionenergyplanckspectralsupernovaalphabreakdistributions
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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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