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Associating long-term γ-ray variability with the superorbital period of LS I + 61◦ 303

dc.contributor.authorACKERMANN, Markus
dc.contributor.authorAJELLO, Marco
hal.structure.identifierAstrophysique Interprétation Modélisation [AIM (UMR7158 / UMR_E_9005 / UM_112)]
dc.contributor.authorBALLET, Jean
dc.contributor.authorBARBIELLINI, Guido
dc.contributor.authorBASTIERI, D.
dc.contributor.authorBELLAZZINI, R.
dc.contributor.authorBONAMENTE, E.
hal.structure.identifierInstitut de recherche en astrophysique et planétologie [IRAP]
dc.contributor.authorJ. BRANDT, T.
dc.contributor.authorBREGEON, J.
dc.contributor.authorBRIGIDA, M.
hal.structure.identifierLaboratoire Leprince-Ringuet [LLR]
dc.contributor.authorBRUEL, Pascal
dc.contributor.authorBUEHLER, R.
dc.contributor.authorBUSON, S.
dc.contributor.authorA. CALIANDRO, G.
dc.contributor.authorA. CAMERON, R.
dc.contributor.authorCARAVEO, P. A.
hal.structure.identifierAstrophysique Interprétation Modélisation [AIM (UMR7158 / UMR_E_9005 / UM_112)]
dc.contributor.authorM. CASANDJIAN, J.
dc.contributor.authorCAVAZZUTI, E.
dc.contributor.authorCECCHI, C.
dc.contributor.authorCHEKHTMAN, A.
dc.contributor.authorCHIANG, J.
dc.contributor.authorCHIARO, G.
dc.contributor.authorCIPRINI, S.
dc.contributor.authorCLAUS, R.
dc.contributor.authorCOHEN-TANUGI, J.
dc.contributor.authorR. COMINSKY, L.
dc.contributor.authorCONRAD, J.
dc.contributor.authorCUTINI, S.
dc.contributor.authorDALTON, M.
dc.contributor.authorD'AMMANDO, F.
dc.contributor.authorDE ANGELIS, A.
dc.contributor.authorR. DEN HARTOG, P.
dc.contributor.authorDE PALMA, F.
dc.contributor.authorD. DERMER, C.
dc.contributor.authorW. DIGEL, S.
dc.contributor.authorDI VENERE, L.
dc.contributor.authorS. DRELL, P.
dc.contributor.authorDUBOIS, R.
dc.contributor.authorFAVUZZI, C.
hal.structure.identifierLaboratoire Leprince-Ringuet [LLR]
dc.contributor.authorJ. FEGAN, S.
dc.contributor.authorC. FERRARA, E.
dc.contributor.authorB. FOCKE, W.
dc.contributor.authorFRANCKOWIAK, A.
dc.contributor.authorFUNK, S.
hal.structure.identifierIstituto Nazionale di Fisica Nucleare, sezione di Bari [INFN, sezione di Bari]
dc.contributor.authorFUSCO, P.
hal.structure.identifierIstituto Nazionale di Fisica Nucleare, sezione di Bari [INFN, sezione di Bari]
dc.contributor.authorGARGANO, F.
dc.contributor.authorGASPARRINI, D.
dc.contributor.authorGERMANI, S.
dc.contributor.authorGIGLIETTO, N.
dc.contributor.authorGIORDANO, F.
dc.contributor.authorGIROLETTI, M.
dc.contributor.authorGLANZMAN, T.
dc.contributor.authorGODFREY, G.
hal.structure.identifierAstrophysique Interprétation Modélisation [AIM (UMR7158 / UMR_E_9005 / UM_112)]
dc.contributor.authorA. GRENIER, I.
dc.contributor.authorGUIRIEC, S.
hal.structure.identifierIEEC-CSIC
dc.contributor.authorHADASCH, D.
dc.contributor.authorHANABATA, Y.
dc.contributor.authorK. HARDING, A.
dc.contributor.authorHAYASHIDA, M.
dc.contributor.authorHAYS, E.
hal.structure.identifierInstitut de Planétologie et d'Astrophysique de Grenoble [IPAG]
dc.contributor.authorB. HILL, A.
hal.structure.identifierLaboratoire Leprince-Ringuet [LLR]
dc.contributor.authorHORAN, D.
dc.contributor.authorE. HUGHES, R.
dc.contributor.authorJOGLER, T.
dc.contributor.authorJ ́OHANNESSON, G.
dc.contributor.authorJOHNSON, A.S.
dc.contributor.authorJ. JOHNSON, T.
dc.contributor.authorKAWANO, T.
dc.contributor.authorKERR, M.
dc.contributor.authorKN ̈ODLSEDER, J.
dc.contributor.authorKUSS, M.
dc.contributor.authorLANDE, J.
dc.contributor.authorLARSSON, S.
dc.contributor.authorLATRONICO, L.
hal.structure.identifierFERMI
dc.contributor.authorLEMOINE-GOUMARD, M.
dc.contributor.authorLI, J.
dc.contributor.authorLONGO, F.
dc.contributor.authorN. LOVELLETTE, M.
dc.contributor.authorLUBRANO, P.
dc.contributor.authorMAYER, M.
dc.contributor.authorN. MAZZIOTTA, M.
dc.contributor.authorE. MCENERY, J.
dc.contributor.authorF. MICHELSON, P.
dc.contributor.authorMIZUNO, T.
dc.contributor.authorE. MONZANI, M.
dc.contributor.authorMORSELLI, A.
dc.contributor.authorV. MOSKALENKO, I.
dc.contributor.authorMURGIA, S.
dc.contributor.authorNEMMEN, R.
hal.structure.identifierLaboratoire Univers et Particules de Montpellier [LUPM]
dc.contributor.authorNUSS, E.
dc.contributor.authorOHSUGI, T.
dc.contributor.authorOKUMURA, A.
dc.contributor.authorORIENTI, M.
dc.contributor.authorORLANDO, E.
dc.contributor.authorF. ORMES, J.
dc.contributor.authorPANEQUE, D.
dc.contributor.authorPAPITTO, A.
dc.contributor.authorS. PERKINS, J.
dc.contributor.authorPESCE-ROLLINS, M.
hal.structure.identifierLaboratoire Univers et Particules de Montpellier [LUPM]
dc.contributor.authorPIRON, F.
dc.contributor.authorPIVATO, G.
dc.contributor.authorRAIN'O, S.
dc.contributor.authorRANDO, R.
dc.contributor.authorRAZZANO, M.
dc.contributor.authorREA, N.
dc.contributor.authorREIMER, A.
dc.contributor.authorREIMER, O.
dc.contributor.authorD. SCARGLE, J.
dc.contributor.authorSCHULZ, A.
dc.contributor.authorSGR'O, C.
dc.contributor.authorJ. SISKIND, E.
dc.contributor.authorSPANDRE, G.
dc.contributor.authorSPINELLI, P.
dc.contributor.authorTAKAHASHI, H.
dc.contributor.authorG. THAYER, J.
dc.contributor.authorB. THAYER, J.
dc.contributor.authorTINIVELLA, M.
dc.contributor.authorF. TORRES, D.
dc.contributor.authorTOSTI, G.
dc.contributor.authorTROJA, E.
dc.contributor.authorUCHIYAMA, Y.
dc.contributor.authorL. USHER, T.
dc.contributor.authorVANDENBROUCKE, J.
hal.structure.identifierLaboratoire Univers et Particules de Montpellier [LUPM]
dc.contributor.authorVASILEIOU, V.
dc.contributor.authorVIANELLO, G.
dc.contributor.authorVITALE, V.
dc.contributor.authorWERNER, M.
dc.contributor.authorL. WINER, B.
dc.contributor.authorS. WOOD, K.
dc.date.issued2013
dc.identifier.issn2041-8205
dc.description.abstractEnGamma-ray binaries are stellar systems for which the spectral ene rgy distribu- tion (discounting the thermal stellar emission) peaks at high energie s. Detected from radio to TeV gamma rays, the γ -ray binary LS I +61 ◦ 303 is highly variable across all frequencies. One aspect of this system's variability is the modula- tion of its emission with the timescale set by the ∼ 26 . 4960-day orbital period. Here we show that, during the time of our observations, the γ -ray emission of LS I +61 ◦ 303 also presents a sinusoidal variability consistent with the previou sly- known superorbital period of 1667 days. This modulation is more pro minently seen at orbital phases around apastron, whereas it does not intr oduce a visible change close to periastron. It is also found in the appearance and d isappearance of variability at the orbital period in the power spectrum of the data . This be- havior could be explained by a quasi-cyclical evolution of the equator ial outflow of the Be companion star, whose features influence the conditions for generating gamma rays. These findings open the possibility to use γ -ray observations to study the outflows of massive stars in eccentric binary systems.
dc.language.isoen
dc.publisherBristol : IOP Publishing
dc.title.enAssociating long-term γ-ray variability with the superorbital period of LS I + 61◦ 303
dc.typeArticle de revue
dc.identifier.doi10.1088/2041-8205/773/2/L35
dc.subject.halPhysique [physics]/Astrophysique [astro-ph]/Phénomènes cosmiques de haute energie [astro-ph.HE]
dc.subject.halPlanète et Univers [physics]/Astrophysique [astro-ph]/Phénomènes cosmiques de haute energie [astro-ph.HE]
dc.identifier.arxiv1307.6384
bordeaux.journalThe Astrophysical journal letters
bordeaux.pageL35
bordeaux.volume773
bordeaux.peerReviewedoui
hal.identifierin2p3-00915658
hal.version1
hal.popularnon
hal.audienceNon spécifiée
hal.origin.linkhttps://hal.archives-ouvertes.fr//in2p3-00915658v1
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