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

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  • Planck Collaboration

Research units

  • Universidad de Salamanca
  • Institut d 'Astrophysique de Paris
  • National Radio Astronomy Observatory
  • Télécom ParisTech
  • University of Granada
  • Université Pierre and Marie Curie
  • Nicolaus Copernicus Astronomical Center
  • University of California at Berkeley
  • University of Ferrara
  • INFN, Sezione di Bologna
  • University of KwaZulu-Natal
  • INAF, Osservatorio Astronomico di Padova
  • Jet Propulsion Laboratory, California Institute of Technology
  • Université Paris Diderot
  • Kavli Institute for Cosmology Cambridge
  • University of Cambridge
  • Université Paris-Sud 11
  • International School for Advanced Studies
  • Université de Toulouse
  • CNRS
  • Instituto de Física de Cantabria (CSIC-Universidad de Cantabria)
  • University College London
  • INAF/IASF Milano
  • University of Milano
  • University of Toronto
  • Lawrence Berkeley National Laboratory
  • INAF/IASF Bologna
  • Université Denis Diderot (Paris 7)
  • Université Grenoble Alpes
  • LERMA - Laboratoire d'Etudes du Rayonnement et de la Matiere en Astrophysique et Atmospheres
  • CEA Saclay, CEA, DSM Irfu SPP
  • Princeton University
  • Niels Bohr Institute
  • California Institute of Technology
  • University of Manchester
  • Università La Sapienza
  • European Space Agcy, European Space Agency, ESAC, Planck Sci Off
  • Max-Planck-Institut für Astrophysik
  • University of Oslo
  • INAF, Osservatorio Astronomico di Trieste
  • University of Helsinki


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, 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.


Original languageEnglish
Article numberA134
Pages (from-to)1-21
Number of pages21
JournalAstronomy and Astrophysics
Publication statusPublished - 1 Feb 2016
MoE publication typeA1 Journal article-refereed

    Research areas

  • cosmic rays, ISM: supernova remnants, radio continuum: ISM

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