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

Probing the gamma-ray emission from HESS J1834–087 ...

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dc.contributor.author Abramowski, A. pl
dc.contributor.author Aharonian, F. pl
dc.contributor.author Ait Benkhali, F. pl
dc.contributor.author Akhperjanian, A. G. pl
dc.contributor.author Angüner, E. pl
dc.contributor.author Anton, G. pl
dc.contributor.author Backes, M. pl
dc.contributor.author Balenderan, S. pl
dc.contributor.author Balzer, A. pl
dc.contributor.author Barnacka, Anna [SAP14011957] pl
dc.contributor.author Becherini, Y. pl
dc.contributor.author Becker Tjus, J. pl
dc.contributor.author Bernlöhr, K. pl
dc.contributor.author Birsin, E. pl
dc.contributor.author Bissaldi, E. pl
dc.contributor.author Biteau, J. pl
dc.contributor.author Böttcher, M. pl
dc.contributor.author Boisson, C. pl
dc.contributor.author Bolmont, J. pl
dc.contributor.author Bordas, P. pl
dc.contributor.author Brucker, J. pl
dc.contributor.author Brun, F. pl
dc.contributor.author Brun, P. pl
dc.contributor.author Bulik, T. pl
dc.contributor.author Carrigan, S. pl
dc.contributor.author Casanova, S. pl
dc.contributor.author Chadwick, P. M. pl
dc.contributor.author Chalme-Calvet, R. pl
dc.contributor.author Chaves, R. C. G. pl
dc.contributor.author Cheesebrough, A. pl
dc.contributor.author Chrétien, M. pl
dc.contributor.author Colafrancesco, S. pl
dc.contributor.author Cologna, G. pl
dc.contributor.author Conrad, J. pl
dc.contributor.author Couturier, C. pl
dc.contributor.author Cui, Y. pl
dc.contributor.author Dalton, M. pl
dc.contributor.author Daniel, M. K. pl
dc.contributor.author Davids, I. D. pl
dc.contributor.author Degrange, B. pl
dc.contributor.author Deil, C. pl
dc.contributor.author deWilt, P. pl
dc.contributor.author Dickinson, H. J. pl
dc.contributor.author Djannati-Ataï, A. pl
dc.contributor.author Domainko, W. pl
dc.contributor.author Drury, L. O’C. pl
dc.contributor.author Dubus, G. pl
dc.contributor.author Dutson, K. pl
dc.contributor.author Dyks, J. pl
dc.contributor.author Dyrda, M. pl
dc.contributor.author Edwards, T. pl
dc.contributor.author Egberts, K. pl
dc.contributor.author Eger, P. pl
dc.contributor.author Espigat, P. pl
dc.contributor.author Farnier, C. pl
dc.contributor.author Fegan, S. pl
dc.contributor.author Feinstein, F. pl
dc.contributor.author Fernandes, M. V. pl
dc.contributor.author Fernandez, D. pl
dc.contributor.author Fiasson, A. pl
dc.contributor.author Fontaine, G. pl
dc.contributor.author Förster, A. pl
dc.contributor.author Füßling, M. pl
dc.contributor.author Gajdus, M. pl
dc.contributor.author Gallant, Y. A. pl
dc.contributor.author Garrigoux, T. pl
dc.contributor.author Giavitto, G. pl
dc.contributor.author Giebels, B. pl
dc.contributor.author Glicenstein, J. F. pl
dc.contributor.author Grondin, M.-H. pl
dc.contributor.author Grudzińska, M. pl
dc.contributor.author Häffner, S. pl
dc.contributor.author Hahn, J. pl
dc.contributor.author Harris, J. pl
dc.contributor.author Heinzelmann, G. pl
dc.contributor.author Henri, G. pl
dc.contributor.author Hermann, G. pl
dc.contributor.author Hervet, O. pl
dc.contributor.author Hillert, A. pl
dc.contributor.author Hinton, J. A. pl
dc.contributor.author Hofmann, W. pl
dc.contributor.author Hofverberg, P. pl
dc.contributor.author Holler, M. pl
dc.contributor.author Horns, D. pl
dc.contributor.author Jacholkowska, A. pl
dc.contributor.author Jahn, C. pl
dc.contributor.author Jamrozy, Marek [SAP11016371] pl
dc.contributor.author Janiak, M. pl
dc.contributor.author Jankowsky, F. pl
dc.contributor.author Jung, I. pl
dc.contributor.author Kastendieck, M. A. pl
dc.contributor.author Katarzyński, K. pl
dc.contributor.author Katz, U. pl
dc.contributor.author Kaufmann, S. pl
dc.contributor.author Khélifi, B. pl
dc.contributor.author Kieffer, M. pl
dc.contributor.author Klepser, S. pl
dc.contributor.author Klochkov, D. pl
dc.contributor.author Kluźniak, W. pl
dc.contributor.author Kneiske, T. pl
dc.contributor.author Kolitzus, D. pl
dc.contributor.author Komin, Nu. pl
dc.contributor.author Kosack, K. pl
dc.contributor.author Krakau, S. pl
dc.contributor.author Krayzel, F. pl
dc.contributor.author Krüger, P. P. pl
dc.contributor.author Laffon, H. pl
dc.contributor.author Lamanna, G. pl
dc.contributor.author Lefaucheur, J. pl
dc.contributor.author Lemière, A. pl
dc.contributor.author Lemoine-Goumard, M. pl
dc.contributor.author Lenain, J.-P. pl
dc.contributor.author Lohse, T. pl
dc.contributor.author Lopatin, A. pl
dc.contributor.author Lu, C.-C. pl
dc.contributor.author Marandon, V. pl
dc.contributor.author Marcowith, A. pl
dc.contributor.author Marx, R. pl
dc.contributor.author Maurin, G. pl
dc.contributor.author Maxted, N. pl
dc.contributor.author Mayer, M. pl
dc.contributor.author McComb, T. J. L. pl
dc.contributor.author Méhault, J. pl
dc.contributor.author Meintjes, P. J. pl
dc.contributor.author Menzler, U. pl
dc.contributor.author Meyer, M. pl
dc.contributor.author Moderski, R. pl
dc.contributor.author Mohamed, M. pl
dc.contributor.author Moulin, E. pl
dc.contributor.author Murach, T. pl
dc.contributor.author Naumann, C. L. pl
dc.contributor.author de Naurois, M. pl
dc.contributor.author Niemiec, J. pl
dc.contributor.author Nolan, S. J. pl
dc.contributor.author Oakes, L. pl
dc.contributor.author Odaka, H. pl
dc.contributor.author Ohm, S. pl
dc.contributor.author de Oña Wilhelmi, E. pl
dc.contributor.author Opitz, B. pl
dc.contributor.author Ostrowski, Michał [SAP11009779] pl
dc.contributor.author Oya, I. pl
dc.contributor.author Panter, M. pl
dc.contributor.author Parsons, R. D. pl
dc.contributor.author Paz Arribas, M. pl
dc.contributor.author Pekeur, N. W. pl
dc.contributor.author Pelletier, G. pl
dc.contributor.author Perez, J. pl
dc.contributor.author Petrucci, P.-O. pl
dc.contributor.author Peyaud, B. pl
dc.contributor.author Pita, S. pl
dc.contributor.author Poon, H. pl
dc.contributor.author Pühlhofer, G. pl
dc.contributor.author Punch, M. pl
dc.contributor.author Quirrenbach, A. pl
dc.contributor.author Raab, S. pl
dc.contributor.author Raue, M. pl
dc.contributor.author Reichardt, I. pl
dc.contributor.author Reimer, A. pl
dc.contributor.author Reimer, O. pl
dc.contributor.author Renaud, M. pl
dc.contributor.author de los Reyes, R. pl
dc.contributor.author Rieger, F. pl
dc.contributor.author Rob, L. pl
dc.contributor.author Romoli, C. pl
dc.contributor.author Rosier-Lees, S. pl
dc.contributor.author Rowell, G. pl
dc.contributor.author Rudak, B. pl
dc.contributor.author Rulten, C. B. pl
dc.contributor.author Sahakian, V. pl
dc.contributor.author Sanchez, D. A. pl
dc.contributor.author Santangelo, A. pl
dc.contributor.author Schlickeiser, R. pl
dc.contributor.author Schüssler, F. pl
dc.contributor.author Schulz, A. pl
dc.contributor.author Schwanke, U. pl
dc.contributor.author Schwarzburg, S. pl
dc.contributor.author Schwemmer, S. pl
dc.contributor.author Sol, H. pl
dc.contributor.author Spengler, G. pl
dc.contributor.author Spies, F. pl
dc.contributor.author Stawarz, Łukasz [SAP11018649] pl
dc.contributor.author Steenkamp, R. pl
dc.contributor.author Stegmann, C. pl
dc.contributor.author Stinzing, F. pl
dc.contributor.author Stycz, K. pl
dc.contributor.author Sushch, I. pl
dc.contributor.author Tavernet, J.-P. pl
dc.contributor.author Tavernier, T. pl
dc.contributor.author Taylor, A. M. pl
dc.contributor.author Terrier, R. pl
dc.contributor.author Tluczykont, M. pl
dc.contributor.author Trichard, C. pl
dc.contributor.author Valerius, K. pl
dc.contributor.author van Eldik, C. pl
dc.contributor.author van Soelen, B. pl
dc.contributor.author Vasileiadis, G. pl
dc.contributor.author Venter, C. pl
dc.contributor.author Viana, A. pl
dc.contributor.author Vincent, P. pl
dc.contributor.author Völk, H. J. pl
dc.contributor.author Volpe, F. pl
dc.contributor.author Vorster, M. pl
dc.contributor.author Vuillaume, T. pl
dc.contributor.author Wagner, S. J. pl
dc.contributor.author Wagner, P. pl
dc.contributor.author Wagner, R. M. pl
dc.contributor.author Ward, M. pl
dc.contributor.author Weidinger, M. pl
dc.contributor.author Weitzel, Q. pl
dc.contributor.author White, R. pl
dc.contributor.author Wierzcholska, Alicja [USOS30589] pl
dc.contributor.author Willmann, P. pl
dc.contributor.author Wörnlein, A. pl
dc.contributor.author Wouters, D. pl
dc.contributor.author Yang, R. pl
dc.contributor.author Zabalza, V. pl
dc.contributor.author Zacharias, M. pl
dc.contributor.author Zdziarski, A. A. pl
dc.contributor.author Zech, A. pl
dc.contributor.author Zechlin, H.-S. pl
dc.contributor.author Acero, F. pl
dc.contributor.author Casandjian, J. M. pl
dc.contributor.author Cohen-Tanugi, J. pl
dc.contributor.author Giordano, F. pl
dc.contributor.author Guillemot, L. pl
dc.contributor.author Lande, J. pl
dc.contributor.author Pletsch, H. pl
dc.contributor.author Uchiyama, Y. pl
dc.date.accessioned 2015-06-26T09:46:00Z
dc.date.available 2015-06-26T09:46:00Z
dc.date.issued 2015 pl
dc.identifier.issn 0004-6361 pl
dc.identifier.uri http://ruj.uj.edu.pl/xmlui/handle/item/10468
dc.language eng pl
dc.title Probing the gamma-ray emission from HESS J1834–087 using H.E.S.S. and Fermi LAT observations pl
dc.type JournalArticle pl
dc.abstract.en Aims. Previous observations with the High Energy Stereoscopic System (H.E.S.S.) have revealed an extended very-high-energy (VHE; E> 100 GeV) γ-ray source, HESS J1834−087, coincident with the supernova remnant (SNR) W41. The origin of the γ-ray emission was investigated in more detail with the H.E.S.S. array and the Large Area Telescope (LAT) onboard the Fermi Gamma-ray Space Telescope. Methods. The γ-ray data provided by 61 h of observations with H.E.S.S., and four years with the Fermi LAT were analyzed, covering over five decades in energy from 1.8 GeV up to 30 TeV. The morphology and spectrum of the TeV and GeV sources were studied and multiwavelength data were used to investigate the origin of the γ-ray emission toward W41. Results. The TeV source can be modeled with a sum of two components: one point-like and one significantly extended (\sigma _{TeV} = 0.17° \pm 0.01°), both centered on SNR W41 and exhibiting spectra described by a power law with index \GammaTeV \simeq 2.6. The GeV source detected with Fermi LAT is extended (\sigma _{GeV} = 0.15° \pm 0.03°) and morphologically matches the VHE emission. Its spectrum can be described by a power-law model with an index \Gamma_{GeV} = 2.15 \pm 0.12 and smoothly joins the spectrum of the whole TeV source. A break appears in the γ-ray spectra around 100 GeV. No pulsations were found in the GeV range. Conclusions. Two main scenarios are proposed to explain the observed emission: a pulsar wind nebula (PWN) or the interaction of SNR W41 with an associated molecular cloud. X-ray observations suggest the presence of a point-like source (a pulsar candidate) near the center of the remnant and nonthermal X-ray diffuse emission that could arise from the possibly associated PWN. The PWN scenario is supported by the compatible positions of the TeV and GeV sources with the putative pulsar. However, the spectral energy distribution from radio to γ-rays is reproduced by a one-zone leptonic model only if an excess of low-energy electrons is injected following a Maxwellian distribution by a pulsar with a high spin-down power (>10^{37}erg s^{-1}). This additional low-energy component is not needed if we consider that 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 γ-ray sources, the detection of OH (1720 MHz) maser lines, and the hadronic modeling. pl
dc.subject.en acceleration of particles pl
dc.subject.en ISM: supernova remnants pl
dc.subject.en ISM: clouds pl
dc.subject.en cosmic rays pl
dc.description.volume 574 pl
dc.identifier.doi 10.1051/0004-6361/201322694 pl
dc.identifier.eissn 1432-0746 pl
dc.title.journal Astronomy and Astrophysics pl
dc.contributor.institution H.E.S.S. Collaboration pl
dc.contributor.institution Fermi-LAT Collaboration pl
dc.language.container eng pl
dc.affiliation Wydział Fizyki, Astronomii i Informatyki Stosowanej : Instytut – Obserwatorium Astronomiczne pl
dc.subtype Article pl
dc.identifier.articleid A27 pl
dc.rights.original OTHER; otwarte czasopismo; ostateczna wersja wydawcy; po opublikowaniu; 12 pl
.pointsMNiSW [2015 A]: 35


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