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A deep spectromorphological study of the $\gamma$-ray emission surrounding the young massive stellar cluster Westerlund 1

dc.contributor.authorAHARONIAN, F.
hal.structure.identifierLaboratoire Leprince-Ringuet [LLR]
dc.contributor.authorASHKAR, H.
dc.contributor.authorBACKES, M.
dc.contributor.authorMARTINS, V. Barbosa
hal.structure.identifierAstroParticule et Cosmologie [APC (UMR_7164)]
dc.contributor.authorBECHERINI, Y.
dc.contributor.authorBERGE, D.
dc.contributor.authorBI, B.
dc.contributor.authorBÖTTCHER, M.
hal.structure.identifierLaboratoire d'Annecy de Physique des Particules [LAPP]
dc.contributor.authorDE BONY DE LAVERGNE, M.
hal.structure.identifierInstitut de Recherches sur les lois Fondamentales de l'Univers [IRFU]
dc.contributor.authorBRADASCIO, F.
dc.contributor.authorBROSE, R.
hal.structure.identifierInstitut de Recherches sur les lois Fondamentales de l'Univers [IRFU]
dc.contributor.authorBRUN, F.
dc.contributor.authorBULIK, T.
dc.contributor.authorBURGER-SCHEIDLIN, C.
hal.structure.identifierLaboratoire de Physique Nucléaire et de Hautes Énergies [LPNHE (UMR_7585)]
dc.contributor.authorCANGEMI, F.
hal.structure.identifierLaboratoire de Physique Nucléaire et de Hautes Énergies [LPNHE (UMR_7585)]
dc.contributor.authorCAROFF, S.
dc.contributor.authorCASANOVA, S.
hal.structure.identifierAstroParticule et Cosmologie [APC (UMR_7164)]
dc.contributor.authorCERRUTI, M.
dc.contributor.authorCHAND, T.
dc.contributor.authorCHANDRA, S.
dc.contributor.authorCHEN, A.
dc.contributor.authorCHIBUEZE, O.
hal.structure.identifierLaboratoire Univers et Théories [LUTH (UMR_8102)]
dc.contributor.authorCRISTOFARI, P.
dc.contributor.authorMBARUBUCYEYE, J. Damascene
hal.structure.identifierAstroParticule et Cosmologie [APC (UMR_7164)]
dc.contributor.authorDJANNATI-ATAÏ, A.
hal.structure.identifierCentre de Physique des Particules de Marseille [CPPM]
dc.contributor.authorERNENWEIN, J.-P.
dc.contributor.authorFEIJEN, K.
hal.structure.identifierLaboratoire Univers et Théories [LUTH (UMR_8102)]
dc.contributor.authorDE CLAIRFONTAINE, G. Fichet
hal.structure.identifierLaboratoire Leprince-Ringuet [LLR]
dc.contributor.authorFONTAINE, G.
dc.contributor.authorFUNK, S.
hal.structure.identifierAstroParticule et Cosmologie [APC (UMR_7164)]
dc.contributor.authorGABICI, S.
hal.structure.identifierLaboratoire Univers et Particules de Montpellier [LUPM]
dc.contributor.authorGALLANT, Y.A.
dc.contributor.authorGHAFOURIZADEH, S.
dc.contributor.authorGIAVITTO, G.
hal.structure.identifierAstroParticule et Cosmologie [APC (UMR_7164)]
hal.structure.identifierInstitut de Recherches sur les lois Fondamentales de l'Univers [IRFU]
dc.contributor.authorGIUNTI, L.
dc.contributor.authorGLAWION, D.
hal.structure.identifierInstitut de Recherches sur les lois Fondamentales de l'Univers [IRFU]
dc.contributor.authorGLICENSTEIN, J.F.
dc.contributor.authorGOSWAMI, P.
hal.structure.identifierLaboratoire de Physique des Deux Infinis Bordeaux [LP2I - Bordeaux]
dc.contributor.authorGRONDIN, M.-H.
dc.contributor.authorHÄRER, L.K.
dc.contributor.authorHAUPT, M.
dc.contributor.authorHINTON, J.A.
dc.contributor.authorHÖRBE, M.
dc.contributor.authorHOFMANN, W.
dc.contributor.authorHOLCH, T.L.
dc.contributor.authorHOLLER, M.
dc.contributor.authorHORNS, D.
dc.contributor.authorJAMROZY, M.
dc.contributor.authorJOSHI, V.
dc.contributor.authorJUNG-RICHARDT, I.
dc.contributor.authorKASAI, E.
dc.contributor.authorKATARZYNSKI, K.
dc.contributor.authorKATZ, U.
hal.structure.identifierAstroParticule et Cosmologie [APC (UMR_7164)]
dc.contributor.authorKHÉLIFI, B.
dc.contributor.authorKLÚZNIAK, W.
dc.contributor.authorKOMIN, Nu.
hal.structure.identifierInstitut de Recherches sur les lois Fondamentales de l'Univers [IRFU]
dc.contributor.authorKOSACK, K.
dc.contributor.authorKOSTUNIN, D.
dc.contributor.authorMEZEK, G. Kukec
dc.contributor.authorLANG, R.G.
hal.structure.identifierCentre de Physique des Particules de Marseille [CPPM]
dc.contributor.authorLE STUM, S.
hal.structure.identifierAstroParticule et Cosmologie [APC (UMR_7164)]
dc.contributor.authorLEMIÈRE, A.
hal.structure.identifierLaboratoire de Physique des Deux Infinis Bordeaux [LP2I - Bordeaux]
dc.contributor.authorLEMOINE-GOUMARD, M.
hal.structure.identifierLaboratoire de Physique Nucléaire et de Hautes Énergies [LPNHE (UMR_7585)]
dc.contributor.authorLENAIN, J.-P.
dc.contributor.authorLEUSCHNER, F.
dc.contributor.authorLOHSE, T.
hal.structure.identifierLaboratoire Univers et Théories [LUTH (UMR_8102)]
dc.contributor.authorLUASHVILI, A.
dc.contributor.authorLYPOVA, I.
dc.contributor.authorMACKEY, J.
dc.contributor.authorMAJUMDAR, J.
dc.contributor.authorMALYSHEV, D.
dc.contributor.authorMARANDON, V.
dc.contributor.authorMARCHEGIANI, P.
hal.structure.identifierLaboratoire Univers et Particules de Montpellier [LUPM]
dc.contributor.authorMARCOWITH, A.
dc.contributor.authorMARTÍ-DEVESA, G.
dc.contributor.authorMARX, R.
hal.structure.identifierLaboratoire d'Annecy de Physique des Particules [LAPP]
dc.contributor.authorMAURIN, G.
dc.contributor.authorMEYER, M.
dc.contributor.authorMITCHELL, A.
dc.contributor.authorMODERSKI, R.
dc.contributor.authorMOHRMANN, L.
hal.structure.identifierInstitut de Recherches sur les lois Fondamentales de l'Univers [IRFU]
dc.contributor.authorMONTANARI, A.
hal.structure.identifierInstitut de Recherches sur les lois Fondamentales de l'Univers [IRFU]
dc.contributor.authorMOULIN, E.
hal.structure.identifierLaboratoire Leprince-Ringuet [LLR]
dc.contributor.authorMULLER, J.
dc.contributor.authorMURACH, T.
dc.contributor.authorNAKASHIMA, K.
hal.structure.identifierLaboratoire Leprince-Ringuet [LLR]
dc.contributor.authorDE NAUROIS, M.
dc.contributor.authorNAYERHODA, A.
dc.contributor.authorNIEMIEC, J.
dc.contributor.authorOHM, S.
dc.contributor.authorOLIVERA-NIETO, L.
dc.contributor.authorDE ONA WILHELMI, E.
dc.contributor.authorOSTROWSKI, M.
dc.contributor.authorPANNY, S.
dc.contributor.authorPANTER, M.
dc.contributor.authorPARSONS, R.D.
dc.contributor.authorPERON, G.
dc.contributor.authorPROKHOROV, D.A.
dc.contributor.authorPÜHLHOFER, G.
hal.structure.identifierAstroParticule et Cosmologie [APC (UMR_7164)]
dc.contributor.authorPUNCH, M.
dc.contributor.authorQUIRRENBACH, A.
dc.contributor.authorRAUTH, R.
hal.structure.identifierInstitut de Recherches sur les lois Fondamentales de l'Univers [IRFU]
dc.contributor.authorREICHHERZER, P.
dc.contributor.authorREIMER, A.
dc.contributor.authorREIMER, O.
hal.structure.identifierLaboratoire Univers et Particules de Montpellier [LUPM]
dc.contributor.authorRENAUD, M.
dc.contributor.authorREVILLE, B.
dc.contributor.authorRIEGER, F.
dc.contributor.authorROWELL, G.
dc.contributor.authorRUDAK, B.
dc.contributor.authorRUIZ-VELASCO, E.
dc.contributor.authorSAHAKIAN, V.
dc.contributor.authorSALZMANN, H.
hal.structure.identifierLaboratoire d'Annecy de Physique des Particules [LAPP]
dc.contributor.authorSANCHEZ, D.A.
dc.contributor.authorSANTANGELO, A.
dc.contributor.authorSASAKI, M.
hal.structure.identifierInstitut de Recherches sur les lois Fondamentales de l'Univers [IRFU]
dc.contributor.authorSCHÜSSLER, F.
dc.contributor.authorSCHUTTE, H.M.
dc.contributor.authorSCHWANKE, U.
dc.contributor.authorSHAPOPI, J.N.S.
dc.contributor.authorSPECOVIUS, A.
dc.contributor.authorSPENCER, S.
dc.contributor.authorSTAWARZ, Ł.
dc.contributor.authorSTEENKAMP, R.
dc.contributor.authorSTEINMASSL, S.
dc.contributor.authorSTEPPA, C.
dc.contributor.authorSUSHCH, I.
dc.contributor.authorSUZUKI, H.
dc.contributor.authorTAKAHASHI, T.
dc.contributor.authorTANAKA, T.
hal.structure.identifierAstroParticule et Cosmologie [APC (UMR_7164)]
dc.contributor.authorTERRIER, R.
dc.contributor.authorTHORPE-MORGAN, C.
dc.contributor.authorTSIROU, M.
dc.contributor.authorTSUJI, N.
dc.contributor.authorTUFFS, R.
dc.contributor.authorUNBEHAUN, T.
dc.contributor.authorVAN ELDIK, C.
dc.contributor.authorVAN SOELEN, B.
dc.contributor.authorVECCHI, M.
dc.contributor.authorVEH, J.
dc.contributor.authorVENTER, C.
dc.contributor.authorVINK, J.
dc.contributor.authorWAGNER, S.J.
dc.contributor.authorWHITE, R.
dc.contributor.authorWIERZCHOLSKA, A.
dc.contributor.authorWONG, Yu Wun
hal.structure.identifierLaboratoire Univers et Théories [LUTH (UMR_8102)]
dc.contributor.authorZACHARIAS, M.
dc.contributor.authorZARGARYAN, D.
dc.contributor.authorZDZIARSKI, A.A.
dc.contributor.authorZHU, S.J.
hal.structure.identifierAstroParticule et Cosmologie [APC (UMR_7164)]
dc.contributor.authorZOUARI, S.
dc.contributor.authorZYWUCKA, N.
dc.contributor.authorBLACKWELL, R.
dc.contributor.authorBRAIDING, C.
dc.contributor.authorBURTON, M.
dc.contributor.authorCUBUK, K.
dc.contributor.authorFILIPOVIC, M.
dc.contributor.authorTOTHILL, N.
dc.contributor.authorWONG, G.
dc.date.accessioned2022-09-15T12:34:50Z
dc.date.available2022-09-15T12:34:50Z
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/145322
dc.description.abstractEnYoung massive stellar clusters are extreme environments and potentially provide the means for efficient particle acceleration. Indeed, they are increasingly considered as being responsible for a significant fraction of cosmic rays (CRs) accelerated within the Milky Way. Westerlund 1, the most massive known young stellar cluster in our Galaxy is a prime candidate for studying this hypothesis. While the very-high-energy $\gamma$-ray source HESS J1646-458 has been detected in the vicinity of Westerlund 1 in the past, its association could not be firmly identified. We aim to identify the physical processes responsible for the $\gamma$-ray emission around Westerlund 1 and thus to better understand the role of massive stellar clusters in the acceleration of Galactic CRs. Using 164 hours of data recorded with the High Energy Stereoscopic System (H.E.S.S.), we carried out a deep spectromorphological study of the $\gamma$-ray emission of HESS J1646-458. We furthermore employed H I and CO observations of the region to infer the presence of gas that could serve as target material for interactions of accelerated CRs. We detected large-scale ($\sim 2^\circ$ diameter) $\gamma$-ray emission with a complex morphology, exhibiting a shell-like structure and showing no significant variation with $\gamma$-ray energy. The combined energy spectrum of the emission extends to several tens of TeV, and is uniform across the entire source region. We did not find a clear correlation of the $\gamma$-ray emission with gas clouds as identified through H I and CO observations. We conclude that, of the known objects within the region, only Westerlund 1 can explain the bulk of the $\gamma$-ray emission. Several CR acceleration sites and mechanisms are conceivable, and discussed in detail. (abridged)
dc.language.isoen
dc.title.enA deep spectromorphological study of the $\gamma$-ray emission surrounding the young massive stellar cluster Westerlund 1
dc.typeDocument de travail - Pré-publication
dc.subject.halPhysique [physics]/Astrophysique [astro-ph]
dc.identifier.arxiv2207.10921
bordeaux.hal.laboratoriesLaboratoire de Physique des Deux Infinis de Bordeaux (LP2I) - UMR 5797*
bordeaux.institutionUniversité de Bordeaux
bordeaux.institutionCNRS
hal.identifierhal-03771735
hal.version1
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-03771735v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.au=AHARONIAN,%20F.&ASHKAR,%20H.&BACKES,%20M.&MARTINS,%20V.%20Barbosa&BECHERINI,%20Y.&rft.genre=preprint


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