Annihilation emission from young supernova remnants

  title={Annihilation emission from young supernova remnants},
  author={Pierrick Martin and Jacco Vink and Sarka Jiraskova and P. Jean and Roland Diehl},
  journal={Astronomy and Astrophysics},
Context. A promising source of the positrons that contribute through annihilation to the diffuse Galactic 511 keV emission is the β+-decay of unstable nuclei like 56Ni and 44Ti synthesised by massive stars and supernovae. Although a large fraction of these positrons annihilate in the ejecta of SNe/SNRs, no point-source of annihilation radiation appears in the INTEGRAL/SPI map of the 511 keV emission. Aims. We exploit the absence of detectable annihilation emission from young local SNe/SNRs to… 

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