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  Probing the gamma-ray emission from HESS J1834-087 using H.E.S.S. and Fermi LAT observations

Abramowski, A., Aharonian, F., Benkhali, F. A., Akhperjanian, A. G., Angüner, E., Anton, G., et al. (2015). Probing the gamma-ray emission from HESS J1834-087 using H.E.S.S. and Fermi LAT observations. Astronomy and Astrophysics, 574: A27. doi:10.1051/0004-6361/201322694.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0025-BFBB-2 Version Permalink: http://hdl.handle.net/21.11116/0000-0001-F344-0
Genre: Journal Article

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Abramowski, A., Author
Aharonian, F., Author
Benkhali, F. Ait, Author
Akhperjanian, A. G., Author
Angüner, E., Author
Anton, G., Author
Backes, M., Author
Balenderan, S., Author
Balzer, A., Author
Barnacka, A., Author
Becherini, Y., Author
Tjus, J. Becker, Author
Bernlöhr, K., Author
Birsin, E., Author
Bissaldi, E., Author
Biteau, J., Author
Böttcher, M., Author
Boisson, C., Author
Bolmont, J., Author
Bordas, P., Author
Brucker, J., AuthorBrun, F., AuthorBrun, P., AuthorBulik, T., AuthorCarrigan, S., AuthorCasanova, S., AuthorChadwick, P. M., AuthorChalme-Calvet, R., AuthorChaves, R. C. G., AuthorCheesebrough, A., AuthorChrétien, M., AuthorColafrancesco, S., AuthorCologna, G., AuthorConrad, J., AuthorCouturier, C., AuthorCui, Y., AuthorDalton, M., AuthorDaniel, M. K., AuthorDavids, I. D., AuthorDegrange, B., AuthorDeil, C., AuthordeWilt, P., AuthorDickinson, H. J., AuthorDjannati-Ataï, A., AuthorDomainko, W., AuthorDrury, L. O'C., AuthorDubus, G., AuthorDutson, K., AuthorDyks, J., AuthorDyrda, M., AuthorEdwards, T., AuthorEgberts, K., AuthorEger, P., AuthorEspigat, P., AuthorFarnier, C., AuthorFegan, S., AuthorFeinstein, F., AuthorFernandes, M. V., AuthorFernandez, D., AuthorFiasson, A., AuthorFontaine, G., AuthorFörster, A., AuthorFüßling, M., AuthorGajdus, M., AuthorGallant, Y. A., AuthorGarrigoux, T., AuthorGiavitto, G., AuthorGiebels, B., AuthorGlicenstein, J. F., AuthorGrondin, M. -H., AuthorGrudzińska, M., AuthorHäffner, S., AuthorHahn, J., AuthorHarris, J., AuthorHeinzelmann, G., AuthorHenri, G., AuthorHermann, G., AuthorHervet, O., AuthorHillert, A., AuthorHinton, J. A., AuthorHofmann, W., AuthorHofverberg, P., AuthorHoller, M., AuthorHorns, D., AuthorJacholkowska, A., AuthorJahn, C., AuthorJamrozy, M., AuthorJaniak, M., AuthorJankowsky, F., AuthorJung, I., AuthorKastendieck, M. A., AuthorKatarzyński, K., AuthorKatz, U., AuthorKaufmann, S., AuthorKhélifi, B., AuthorKieffer, M., AuthorKlepser, S., AuthorKlochkov, D., AuthorKluźniak, W., AuthorKneiske, T., AuthorKolitzus, D., AuthorKomin, Nu., AuthorKosack, K., AuthorKrakau, S., AuthorKrayzel, F., AuthorKrüger, P. P., AuthorLaffon, H., AuthorLamanna, G., AuthorLefaucheur, J., AuthorLemière, A., AuthorLemoine-Goumard, M., AuthorLenain, J. -P., AuthorLohse, T., AuthorLopatin, A., AuthorLu, C. -C., AuthorMarandon, V., AuthorMarcowith, A., AuthorMarx, R., AuthorMaurin, G., AuthorMaxted, N., AuthorMayer, M., AuthorMcComb, T. J. L., AuthorMéhault, J., AuthorMeintjes, P. J., AuthorMenzler, U., AuthorMeyer, M., AuthorModerski, R., AuthorMohamed, M., AuthorMoulin, E., AuthorMurach, T., AuthorNaumann, C. L., Authorde Naurois, M., AuthorNiemiec, J., AuthorNolan, S. J., AuthorOakes, L., AuthorOdaka, H., AuthorOhm, S., AuthorWilhelmi, E. de Oña, AuthorOpitz, B., AuthorOstrowski, M., AuthorOya, I., AuthorPanter, M., AuthorParsons, R. D., AuthorArribas, M. Paz, AuthorPekeur, N. W., AuthorPelletier, G., AuthorPerez, J., AuthorPetrucci, P. -O., AuthorPeyaud, B., AuthorPita, S., AuthorPoon, H., AuthorPühlhofer, G., AuthorPunch, M., AuthorQuirrenbach, A., AuthorRaab, S., AuthorRaue, M., AuthorReichardt, I., AuthorReimer, A., AuthorReimer, O., AuthorRenaud, M., AuthorReyes, R. de los, AuthorRieger, F., AuthorRob, L., AuthorRomoli, C., AuthorRosier-Lees, S., AuthorRowell, G., AuthorRudak, B., AuthorRulten, C. B., AuthorSahakian, V., AuthorSanchez, D. A., AuthorSantangelo, A., AuthorSchlickeiser, R., AuthorSchüssler, F., AuthorSchulz, A., AuthorSchwanke, U., AuthorSchwarzburg, S., AuthorSchwemmer, S., AuthorSol, H., AuthorSpengler, G., AuthorSpies, F., AuthorStawarz, Ł., AuthorSteenkamp, R., AuthorStegmann, C., AuthorStinzing, F., AuthorStycz, K., AuthorSushch, I., AuthorTavernet, J. -P., AuthorTavernier, T., AuthorTaylor, A. M., AuthorTerrier, R., AuthorTluczykont, M., AuthorTrichard, C., AuthorValerius, K., Authorvan Eldik, C., Authorvan Soelen, B., AuthorVasileiadis, G., AuthorVenter, C., AuthorViana, A., AuthorVincent, P., AuthorVölk, H. J., AuthorVolpe, F., AuthorVorster, M., AuthorVuillaume, T., AuthorWagner, S. J., AuthorWagner, P., AuthorWagner, R. M., AuthorWard, M., AuthorWeidinger, M., AuthorWeitzel, Q., AuthorWhite, R., AuthorWierzcholska, A., AuthorWillmann, P., AuthorWörnlein, A., AuthorWouters, D., AuthorYang, R., AuthorZabalza, V., AuthorZacharias, M., AuthorZdziarski, A. A., AuthorZech, A., AuthorZechlin, H. -S., AuthorAcero, F., AuthorCasandjian, J. M., AuthorCohen-Tanugi, J., AuthorGiordano, F., AuthorGuillemot, L., AuthorLande, J., AuthorPletsch, H.1, Author              Uchiyama, Y., Author more..
Affiliations:
1Pulsar Observation and Data Analysis, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, escidoc:2253649              

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Free keywords: Astrophysics, High Energy Astrophysical Phenomena, astro-ph.HE
 Abstract: Previous observations with HESS have revealed the existence of an extended very-high-energy (VHE; E>100 GeV) gamma-ray source, HESS J1834-087, coincident with the SNR W41. The origin of the gamma-ray emission has been further investigated with HESS and the Fermi-LAT. The gamma-ray data provided by 61h (HESS) and 4 yrs (Fermi LAT) of observations cover over 5 decades in energy (1.8GeV - 30TeV). The morphology and spectrum of the TeV and GeV sources have been studied and multi-wavelength data have been used to investigate the origin of the observed emission. The TeV source can be modeled with a sum of two components: one point-like and one significantly extended (sig_TeV = 0.17{\deg}), both centered on SNR W41 and exhibiting spectra described by a power law of index 2.6. The GeV source detected with Fermi is extended (sig_GeV =0.15{\deg}) and morphologically matches the VHE emission. Its spectrum can be described by a power-law with index 2.15 and joins smoothly the one of the whole TeV source. A break appears in the spectra around 100 GeV. Two main scenarios are proposed to explain the emission: a pulsar wind nebula (PWN) or the interaction of SNR W41 with a molecular cloud. X-ray observations suggest the presence of a point-like source (pulsar candidate) near the center of the SNR and non-thermal X-ray diffuse emission which could arise from a potential PWN. The PWN scenario is supported by the match of of the TeV and GeV positions with the putative pulsar. However, the overall spectrum is reproduced by a 1-zone leptonic model only if an excess of low-energy electrons is injected by a high spin-down power pulsar. This low-energy component is not needed if the point-like TeV source is unrelated to the extended GeV and TeV sources. The interacting SNR scenario is supported by the spatial coincidence between the gamma-ray sources, the detection of OH maser lines and the hadronic modeling.

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 Dates: 2014-07-032015
 Publication Status: Published online
 Pages: 12 pages, 8 figures, Accepted for publication in Astronomy & Astrophysics
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: arXiv: 1407.0862
DOI: 10.1051/0004-6361/201322694
 Degree: -

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Title: Astronomy and Astrophysics
  Other : Astron. Astrophys.
Source Genre: Journal
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Publ. Info: Berlin : Springer-Verlag
Pages: - Volume / Issue: 574 Sequence Number: A27 Start / End Page: - Identifier: ISSN: 0004-6361
CoNE: http://pubman.mpdl.mpg.de/cone/journals/resource/954922828219_1