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Communication Dans Un Congrès Année : 2021

The Origin of Galactic Cosmic Rays as Revealed by their Composition

John Raymond
  • Fonction : Auteur
Jean Duprat
  • Fonction : Auteur
Stefano Gabici
  • Fonction : Auteur
Sarah Recchia
  • Fonction : Auteur

Résumé

Galactic cosmic-rays (GCRs) are thought to be accelerated in strong shocks induced by massivestar winds and supernova explosions sweeping across the interstellar medium. But the phase of theinterstellar medium from which the CRs are extracted has remained elusive up to now. We havestudied in detail the GCR source composition deduced from recent measurements by the AMS-02,Voyager 1 and SuperTIGER experiments to obtain information on the composition, ionisationstate and dust content of the GCR source reservoirs. The results of this data analysis suggest thatthe GCRs are mainly accelerated in superbubbles energised by the activity of massive star windsand supernova explosions. The resulting model explains well the measured abundances of allprimary and mostly primary CRs from H to Zr, including the overabundance of22Ne.
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Dates et versions

hal-03448643 , version 1 (25-11-2021)

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Vincent Tatischeff, John Raymond, Jean Duprat, Stefano Gabici, Sarah Recchia. The Origin of Galactic Cosmic Rays as Revealed by their Composition. 37th International Cosmic Ray Conference, Jul 2021, Berlin, Germany. pp.153, ⟨10.22323/1.395.0153⟩. ⟨hal-03448643⟩
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