HAL : in2p3-00695269, version 1
 The Astrophysical Journal Letters 749 (2012) L35
 FERMI LARGE AREA TELESCOPE DISCOVERY OF GeV GAMMA-RAY EMISSION FROM THE VICINITY OF SNR W44
 (2012)
 We report the detection of GeV γ-ray emission from the molecular cloud complex that surrounds the supernova remnant (SNR) W44 using the Large Area Telescope on board Fermi. While the previously reported γ-ray emission from SNR W44 is likely to arise from the dense radio-emitting filaments within the remnant, the γ-ray emission that appears to come from the surrounding molecular cloud complex can be ascribed to the cosmic rays (CRs) that have escaped from W44. The non-detection of synchrotron radio emission associated with the molecular cloud complex suggests the decay of π0 mesons produced in hadronic collisions as the γ-ray emission mechanism. The total kinetic energy channeled into the escaping CRs is estimated to be Wesc ~ (0.3-3) × 1050 erg, in broad agreement with the conjecture that SNRs are the main sources of Galactic CRs.
 équipe(s) de recherche : GLAST
 Thème(s) : Physique/Astrophysique/Phénomènes cosmiques de haute energiePlanète et Univers/Astrophysique/Phénomènes cosmiques de haute energie
 Mot(s)-clé(s) : acceleration of particles – cosmic rays – ISM: supernova remnants – radiation mechanisms: non-thermal
 in2p3-00695269, version 1 http://hal.in2p3.fr/in2p3-00695269 oai:hal.in2p3.fr:in2p3-00695269 Contributeur : Nathalie Martin <> Déposé pour le compte de : Marianne LEMOINE-GOUMARD <> Soumis le : Lundi 7 Mai 2012, 16:38:17 Dernière modification le : Mardi 8 Mai 2012, 20:57:22