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The starburst galaxy NGC 253 revisited by H.E.S.S. and Fermi-LAT

dc.contributor.authorABDALLA, H.
dc.contributor.authorAHARONIAN, F.
dc.contributor.authorAIT BENKHALI, F.
hal.structure.identifierCentre de Physique des Particules de Marseille [CPPM]
dc.contributor.authorANGÜNER, E.O.
dc.contributor.authorARAKAWA, M.
dc.contributor.authorARCARO, C.
hal.structure.identifierLaboratoire d'Annecy de Physique des Particules [LAPP]
dc.contributor.authorARMAND, C.
hal.structure.identifierLaboratoire Univers et Théories [LUTH (UMR_8102)]
dc.contributor.authorARRIETA, M.
dc.contributor.authorBACKES, M.
dc.contributor.authorBARNARD, M.
dc.contributor.authorBECHERINI, Y.
dc.contributor.authorBECKER TJUS, J.
dc.contributor.authorBERGE, D.
dc.contributor.authorBERNHARD, S.
dc.contributor.authorBERNLÖHR, K.
dc.contributor.authorBLACKWELL, R.
dc.contributor.authorBÖTTCHER, M.
hal.structure.identifierLaboratoire Univers et Théories [LUTH (UMR_8102)]
dc.contributor.authorBOISSON, C.
hal.structure.identifierLaboratoire de Physique Nucléaire et de Hautes Énergies [LPNHE (UMR_7585)]
dc.contributor.authorBOLMONT, J.
dc.contributor.authorBONNEFOY, S.
dc.contributor.authorBORDAS, P.
hal.structure.identifierLaboratoire Univers et Particules de Montpellier [LUPM]
dc.contributor.authorBREGEON, J.
hal.structure.identifierCentre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG]
dc.contributor.authorBRUN, F.
hal.structure.identifierInstitut de Recherches sur les lois Fondamentales de l'Univers [IRFU]
dc.contributor.authorBRUN, P.
dc.contributor.authorBRYAN, M.
dc.contributor.authorBÜCHELE, M.
dc.contributor.authorBULIK, T.
dc.contributor.authorBYLUND, T.
dc.contributor.authorCAPASSO, M.
hal.structure.identifierLaboratoire Leprince-Ringuet [LLR]
dc.contributor.authorCAROFF, S.
hal.structure.identifierLaboratoire d'Annecy de Physique des Particules [LAPP]
dc.contributor.authorCAROSI, A.
dc.contributor.authorCASANOVA, S.
hal.structure.identifierLaboratoire de Physique Nucléaire et de Hautes Énergies [LPNHE (UMR_7585)]
dc.contributor.authorCERRUTI, M.
dc.contributor.authorCHAKRABORTY, N.
dc.contributor.authorCHANDRA, S.
hal.structure.identifierLaboratoire Univers et Particules de Montpellier [LUPM]
dc.contributor.authorCHAVES, R.C.G.
dc.contributor.authorCHEN, A.
dc.contributor.authorCOLAFRANCESCO, S.
hal.structure.identifierCentre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG]
dc.contributor.authorCONDON, B.
dc.contributor.authorDAVIDS, I.D.
dc.contributor.authorDEIL, C.
hal.structure.identifierLaboratoire Univers et Particules de Montpellier [LUPM]
dc.contributor.authorDEVIN, J.
dc.contributor.authorDEWILT, P.
dc.contributor.authorDIRSON, L.
hal.structure.identifierAstroParticule et Cosmologie [APC (UMR_7164)]
dc.contributor.authorDJANNATI-ATAÏ, A.
hal.structure.identifierLaboratoire Univers et Théories [LUTH (UMR_8102)]
dc.contributor.authorDMYTRIIEV, A.
dc.contributor.authorDONATH, A.
dc.contributor.authorDRURY, L.O'C.
dc.contributor.authorDYKS, J.
dc.contributor.authorEGBERTS, K.
hal.structure.identifierLaboratoire de Physique Nucléaire et de Hautes Énergies [LPNHE (UMR_7585)]
dc.contributor.authorEMERY, G.
hal.structure.identifierCentre de Physique des Particules de Marseille [CPPM]
dc.contributor.authorERNENWEIN, J.-P.
dc.contributor.authorESCHBACH, S.
hal.structure.identifierLaboratoire Leprince-Ringuet [LLR]
dc.contributor.authorFEGAN, S.
hal.structure.identifierLaboratoire d'Annecy de Physique des Particules [LAPP]
dc.contributor.authorFIASSON, A.
hal.structure.identifierLaboratoire Leprince-Ringuet [LLR]
dc.contributor.authorFONTAINE, G.
dc.contributor.authorFUNK, S.
dc.contributor.authorFÜSSLING, M.
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.authorGARRIGOUX, T.
hal.structure.identifierLaboratoire d'Annecy de Physique des Particules [LAPP]
dc.contributor.authorGATÉ, F.
dc.contributor.authorGIAVITTO, G.
dc.contributor.authorGLAWION, D.
hal.structure.identifierInstitut de Recherches sur les lois Fondamentales de l'Univers [IRFU]
dc.contributor.authorGLICENSTEIN, J.F.
dc.contributor.authorGOTTSCHALL, D.
hal.structure.identifierCentre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG]
dc.contributor.authorGRONDIN, M.-H.
dc.contributor.authorHAHN, J.
dc.contributor.authorHAUPT, M.
dc.contributor.authorHEINZELMANN, G.
hal.structure.identifierInstitut de Planétologie et d'Astrophysique de Grenoble [IPAG]
dc.contributor.authorHENRI, G.
dc.contributor.authorHERMANN, G.
dc.contributor.authorHINTON, J.A.
dc.contributor.authorHOFMANN, W.
dc.contributor.authorHOISCHEN, C.
dc.contributor.authorHOLCH, T.L.
dc.contributor.authorHOLLER, M.
dc.contributor.authorHORNS, D.
dc.contributor.authorHUBER, D.
dc.contributor.authorIWASAKI, H.
hal.structure.identifierLaboratoire de Physique Nucléaire et de Hautes Énergies [LPNHE (UMR_7585)]
dc.contributor.authorJACHOLKOWSKA, A.
dc.contributor.authorJAMROZY, M.
dc.contributor.authorJANKOWSKY, D.
dc.contributor.authorJANKOWSKY, F.
hal.structure.identifierAstroParticule et Cosmologie [APC (UMR_7164)]
dc.contributor.authorJOUVIN, L.
dc.contributor.authorJUNG-RICHARDT, I.
dc.contributor.authorKASTENDIECK, M.A.
dc.contributor.authorKATARZYŃSKI, K.
dc.contributor.authorKATSURAGAWA, M.
dc.contributor.authorKATZ, U.
hal.structure.identifierLaboratoire de Physique Nucléaire et de Hautes Énergies [LPNHE (UMR_7585)]
dc.contributor.authorKERSZBERG, D.
dc.contributor.authorKHANGULYAN, D.
hal.structure.identifierAstroParticule et Cosmologie [APC (UMR_7164)]
dc.contributor.authorKHÉLIFI, B.
dc.contributor.authorKING, J.
dc.contributor.authorKLEPSER, S.
dc.contributor.authorKLUŹNIAK, W.
dc.contributor.authorKOMIN, Nu.
hal.structure.identifierInstitut de Recherches sur les lois Fondamentales de l'Univers [IRFU]
dc.contributor.authorKOSACK, K.
dc.contributor.authorKRAKAU, S.
dc.contributor.authorKRAUS, M.
dc.contributor.authorKRÜGER, P.P.
hal.structure.identifierLaboratoire d'Annecy de Physique des Particules [LAPP]
dc.contributor.authorLAMANNA, G.
dc.contributor.authorLAU, J.
hal.structure.identifierInstitut de Recherches sur les lois Fondamentales de l'Univers [IRFU]
dc.contributor.authorLEFAUCHEUR, J.
hal.structure.identifierAstroParticule et Cosmologie [APC (UMR_7164)]
dc.contributor.authorLEMIÈRE, A.
hal.structure.identifierCentre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG]
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.authorLESER, E.
dc.contributor.authorLOHSE, T.
hal.structure.identifierInstitut de Recherches sur les lois Fondamentales de l'Univers [IRFU]
dc.contributor.authorLORENTZ, M.
dc.contributor.authorLÓPEZ-COTO, R.
dc.contributor.authorLYPOVA, I.
dc.contributor.authorMALYSHEV, D.
dc.contributor.authorMARANDON, V.
hal.structure.identifierLaboratoire Univers et Particules de Montpellier [LUPM]
dc.contributor.authorMARCOWITH, Alexandre
hal.structure.identifierLaboratoire Leprince-Ringuet [LLR]
dc.contributor.authorMARIAUD, C.
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.authorMEINTJES, P.J.
dc.contributor.authorMITCHELL, A.M.W.
dc.contributor.authorMODERSKI, R.
dc.contributor.authorMOHAMED, M.
dc.contributor.authorMOHRMANN, L.
hal.structure.identifierInstitut de Recherches sur les lois Fondamentales de l'Univers [IRFU]
dc.contributor.authorMOULIN, E.
dc.contributor.authorMURACH, T.
dc.contributor.authorNAKASHIMA, S.
hal.structure.identifierLaboratoire Leprince-Ringuet [LLR]
dc.contributor.authorDE NAUROIS, M.
dc.contributor.authorNDIYAVALA, H.
dc.contributor.authorNIEDERWANGER, F.
dc.contributor.authorNIEMIEC, J.
dc.contributor.authorOAKES, L.
dc.contributor.authorO'BRIEN, P.
dc.contributor.authorODAKA, H.
dc.contributor.authorOHM, S.
dc.contributor.authorOSTROWSKI, M.
dc.contributor.authorOYA, I.
hal.structure.identifierLaboratoire Univers et Particules de Montpellier [LUPM]
dc.contributor.authorPADOVANI, M.
dc.contributor.authorPANTER, M.
dc.contributor.authorPARSONS, R.D.
hal.structure.identifierLaboratoire de Physique Nucléaire et de Hautes Énergies [LPNHE (UMR_7585)]
dc.contributor.authorPERENNES, C.
hal.structure.identifierInstitut de Planétologie et d'Astrophysique de Grenoble [IPAG]
dc.contributor.authorPETRUCCI, P.-O.
hal.structure.identifierInstitut de Recherches sur les lois Fondamentales de l'Univers [IRFU]
dc.contributor.authorPEYAUD, B.
hal.structure.identifierLaboratoire d'Annecy de Physique des Particules [LAPP]
dc.contributor.authorPIEL, Q.
hal.structure.identifierAstroParticule et Cosmologie [APC (UMR_7164)]
dc.contributor.authorPITA, S.
hal.structure.identifierLaboratoire d'Annecy de Physique des Particules [LAPP]
dc.contributor.authorPOIREAU, V.
dc.contributor.authorPRIYANA NOEL, A.
dc.contributor.authorPROKHOROV, D.A.
dc.contributor.authorPROKOPH, H.
dc.contributor.authorPÜHLHOFER, G.
hal.structure.identifierAstroParticule et Cosmologie [APC (UMR_7164)]
dc.contributor.authorPUNCH, M.
dc.contributor.authorQUIRRENBACH, A.
dc.contributor.authorRAAB, S.
dc.contributor.authorRAUTH, R.
dc.contributor.authorREIMER, A.
dc.contributor.authorREIMER, O.
hal.structure.identifierLaboratoire Univers et Particules de Montpellier [LUPM]
dc.contributor.authorRENAUD, Matthieu
dc.contributor.authorRIEGER, F.
hal.structure.identifierInstitut de Recherches sur les lois Fondamentales de l'Univers [IRFU]
dc.contributor.authorRINCHIUSO, L.
dc.contributor.authorROMOLI, C.
dc.contributor.authorROWELL, G.
dc.contributor.authorRUDAK, B.
dc.contributor.authorRUIZ-VELASCO, E.
dc.contributor.authorSAHAKIAN, V.
dc.contributor.authorSAITO, S.
hal.structure.identifierLaboratoire d'Annecy de Physique des Particules [LAPP]
dc.contributor.authorSANCHEZ, D.A.
dc.contributor.authorSANTANGELO, A.
dc.contributor.authorSASAKI, M.
dc.contributor.authorSCHLICKEISER, R.
hal.structure.identifierInstitut de Recherches sur les lois Fondamentales de l'Univers [IRFU]
dc.contributor.authorSCHÜSSLER, F.
dc.contributor.authorSCHULZ, A.
dc.contributor.authorSCHWANKE, U.
dc.contributor.authorSCHWEMMER, S.
hal.structure.identifierInstitut de Recherches sur les lois Fondamentales de l'Univers [IRFU]
dc.contributor.authorSEGLAR-ARROYO, M.
dc.contributor.authorSENNIAPPAN, M.
dc.contributor.authorSEYFFERT, A.S.
dc.contributor.authorSHAFI, N.
dc.contributor.authorSHILON, I.
dc.contributor.authorSHININGAYAMWE, K.
dc.contributor.authorSIMONI, R.
hal.structure.identifierAstroParticule et Cosmologie [APC (UMR_7164)]
dc.contributor.authorSINHA, A.
hal.structure.identifierLaboratoire Univers et Théories [LUTH (UMR_8102)]
dc.contributor.authorSOL, H.
dc.contributor.authorSPANIER, F.
dc.contributor.authorSPECOVIUS, A.
hal.structure.identifierAstroParticule et Cosmologie [APC (UMR_7164)]
dc.contributor.authorSPIR-JACOB, M.
dc.contributor.authorSTEENKAMP, R.
dc.contributor.authorSTEGMANN, C.
dc.contributor.authorSTEPPA, C.
dc.contributor.authorSUSHCH, I.
dc.contributor.authorTAKAHASHI, T.
hal.structure.identifierLaboratoire de Physique Nucléaire et de Hautes Énergies [LPNHE (UMR_7585)]
dc.contributor.authorTAVERNET, J.-P.
hal.structure.identifierInstitut de Recherches sur les lois Fondamentales de l'Univers [IRFU]
dc.contributor.authorTAVERNIER, T.
dc.contributor.authorTAYLOR, A.M.
hal.structure.identifierAstroParticule et Cosmologie [APC (UMR_7164)]
dc.contributor.authorTERRIER, R.
dc.contributor.authorTIBALDO, L.
dc.contributor.authorTIZIANI, D.
dc.contributor.authorTLUCZYKONT, M.
hal.structure.identifierLaboratoire Leprince-Ringuet [LLR]
dc.contributor.authorTRICHARD, C.
hal.structure.identifierLaboratoire Univers et Particules de Montpellier [LUPM]
dc.contributor.authorTSIROU, M.
dc.contributor.authorTSUJI, N.
dc.contributor.authorTUFFS, R.
dc.contributor.authorUCHIYAMA, Y.
dc.contributor.authorVAN DER WALT, D.J.
dc.contributor.authorVAN ELDIK, C.
dc.contributor.authorVAN RENSBURG, C.
dc.contributor.authorVAN SOELEN, B.
hal.structure.identifierLaboratoire Univers et Particules de Montpellier [LUPM]
dc.contributor.authorVASILEIADIS, George
dc.contributor.authorVEH, J.
dc.contributor.authorVENTER, C.
dc.contributor.authorVIANA, A.
hal.structure.identifierLaboratoire de Physique Nucléaire et de Hautes Énergies [LPNHE (UMR_7585)]
dc.contributor.authorVINCENT, P.
dc.contributor.authorVINK, J.
dc.contributor.authorVOISIN, F.
dc.contributor.authorVÖLK, H.J.
hal.structure.identifierLaboratoire d'Annecy de Physique des Particules [LAPP]
dc.contributor.authorVUILLAUME, T.
dc.contributor.authorWADIASINGH, Z.
dc.contributor.authorWAGNER, S.J.
dc.contributor.authorWAGNER, P.
dc.contributor.authorWAGNER, R.M.
dc.contributor.authorWHITE, R.
dc.contributor.authorWIERZCHOLSKA, A.
dc.contributor.authorWÖRNLEIN, A.
dc.contributor.authorYANG, R.
hal.structure.identifierLaboratoire Leprince-Ringuet [LLR]
dc.contributor.authorZABOROV, D.
dc.contributor.authorZACHARIAS, M.
dc.contributor.authorZANIN, R.
dc.contributor.authorZDZIARSKI, A.A.
hal.structure.identifierLaboratoire Univers et Théories [LUTH (UMR_8102)]
dc.contributor.authorZECH, A.
hal.structure.identifierLaboratoire Leprince-Ringuet [LLR]
dc.contributor.authorZEFI, F.
dc.contributor.authorZIEGLER, A.
dc.contributor.authorZORN, J.
dc.contributor.authorŻYWUCKA, N.
dc.date.issued2018
dc.identifier.issn0004-6361
dc.description.abstractEnContext. NGC 253 is one of only two starburst galaxies found to emit γ-rays from hundreds of MeV to multi-TeV energies. Accurate measurements of the very-high-energy (VHE; E > 100 GeV) and high-energy (HE; E > 60 MeV) spectra are crucial to study the underlying particle accelerators, probe the dominant emission mechanism(s) and to study cosmic-ray interaction and transport.Aims. The measurement of the VHE γ-ray emission of NGC 253 published in 2012 by H.E.S.S. was limited by large systematic uncertainties. Here, the most up to date measurement of the γ-ray spectrum of NGC 253 is investigated in both HE and VHE γ-rays. Assuming a hadronic origin of the γ-ray emission, the measurement uncertainties are propagated into the interpretation of the accelerated particle population.Methods. The data of H.E.S.S. observations are reanalysed using an updated calibration and analysis chain. The improved Fermi–LAT analysis employs more than 8 yr of data processed using pass 8. The cosmic-ray particle population is evaluated from the combined HE–VHE γ-ray spectrum using NAIMA in the optically thin case.Results. The VHE γ-ray energy spectrum is best fit by a power-law distribution with a flux normalisation of (1.34 ± 0.14stat ± 0.27sys) × 10−13 cm−2 s−1 TeV1 at 1 TeV – about 40% above, but compatible with the value obtained in Abramowski et al. (2012). The spectral index Γ = 2.39 ± 0.14stat ± 0.25sys is slightly softer than but consistent with the previous measurement within systematic errors. In the Fermi energy range an integral flux of F(E > 60 MeV) = (1.56 ± 0.28stat ± 0.15sys) × 10−8 cm−2 s−1 is obtained. At energies above ∼3 GeV the HE spectrum is consistent with a power-law ranging into the VHE part of the spectrum measured by H.E.S.S. with an overall spectral index Γ = 2.22 ± 0.06stat.Conclusions. Two scenarios for the starburst nucleus are tested, in which the gas in the starburst nucleus acts as either a thin or a thick target for hadronic cosmic rays accelerated by the individual sources in the nucleus. In these two models, the level to which NGC 253 acts as a calorimeter is estimated to a range of fcal = 0.1 to 1 while accounting for the measurement uncertainties. The presented spectrum is likely to remain the most accurate measurements until the Cherenkov Telescope Array (CTA) has collected a substantial set of data towards NGC 253.Key words: astroparticle physics / galaxies: starburst / gamma rays: galaxies⋆ Funded by EU FP7 Marie Curie, grant agreement No. PIEF-GA-2012-332350.⋆⋆ Corresponding authors: H.E.S.S. Collaboration, e-mail: contact.hess@hess-experiment.eu† Deceased.
dc.language.isoen
dc.publisherEDP Sciences
dc.subject.enastroparticle physics
dc.subject.engalaxies: starburst
dc.subject.engamma rays: galaxies
dc.subject.encosmic radiation: interaction
dc.subject.engamma ray: VHE
dc.subject.engamma ray: energy spectrum
dc.subject.enHESS
dc.subject.ennucleus
dc.subject.engalaxy
dc.subject.enenergy spectrum
dc.subject.enpower spectrum
dc.subject.enaccelerator
dc.subject.enstar
dc.subject.enburst
dc.subject.encalibration
dc.subject.encalorimeter
dc.subject.enGLAST
dc.subject.enflux
dc.subject.engas
dc.title.enThe starburst galaxy NGC 253 revisited by H.E.S.S. and Fermi-LAT
dc.typeArticle de revue
dc.identifier.doi10.1051/0004-6361/201833202
dc.subject.halPhysique [physics]/Astrophysique [astro-ph]
dc.identifier.arxiv1806.03866
bordeaux.journalAstronomy and Astrophysics - A&A
bordeaux.pageA73
bordeaux.volume617
bordeaux.peerReviewedoui
hal.identifierhal-01833680
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01833680v1
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