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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
Probing the gamma-ray emission from HESS J1834-087 using H.E.S.S. and Fermi LAT observations
Astronomy and Astrophysics, Volume 574, Article A27, Year 2015
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Description
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 (σTeV = 0.17° ± 0. 01°), both centered on SNR W41 and exhibiting spectra described by a power law with index ΓTeV ≃ 2.6. The GeV source detected with Fermi LAT is extended (σGeV = 0.15° ± 0.03°) and morphologically matches the VHE emission. Its spectrum can be described by a power-law model with an index ΓGeV = 2.15 ± 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 SNRW41 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 di ffuse 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 (>1037 ergs-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. © ESO 2015.
Authors & Co-Authors
Abramowski, Attila
Germany, Hamburg
Universität Hamburg
Aharonian, F. A.
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Ireland, Dublin
Institiúid Ard-lénn Bhaile Átha Cliath
Armenia, Yerevan
National Academy of Sciences of the Republic of Armenia
Ait Benkhali, F.
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Akhperjanian, Ashot G.
Armenia, Yerevan
National Academy of Sciences of the Republic of Armenia
Armenia, Yerevan
Yerevan Physics Institute
Angüner, Ekrem Oǧuzhan
Germany, Berlin
Humboldt-universität zu Berlin
Anton, Gisela K.Stycz
Germany, Erlangen
Friedrich-alexander-universität Erlangen-nürnberg
Backes, Michael
Namibia, Windhoek
University of Namibia
Balenderan, S.
United Kingdom, Durham
Durham University
Balzer, Arnim
Germany, Hamburg
Deutsches Elektronen-synchrotron Desy
Germany, Potsdam
Universität Potsdam
Barnacka, Anna
Poland, Warsaw
Nicolaus Copernicus Astronomical Center of the Polish Academy of Sciences
Becherini, Yvonne
Sweden, Vaxjo
Linnaeus University, Växjö
Becker-Tjus, Julia
Germany, Bochum
Ruhr-universitat Bochum
Bernlöhr, Konrad
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Germany, Berlin
Humboldt-universität zu Berlin
Birsin, Emrah
Germany, Berlin
Humboldt-universität zu Berlin
Bissaldi, Elisabetta
Austria, Innsbruck
Universität Innsbruck
Biteau, Jonathan
France, Paris
In2p3 - Institut National de Physique Nucléaire et de Physique Des Particules
United States, Santa Cruz
University of California, Santa Cruz
Boettcher, M.
South Africa, Potchefstroom
North-west University
Boisson, Catherine
France, Paris
Cnrs Centre National de la Recherche Scientifique
Bolmont, Julien
France, Paris
In2p3 - Institut National de Physique Nucléaire et de Physique Des Particules
Bordas, Pol
Germany, Tubingen
Eberhard Karls Universität Tübingen
Brucker, Julia
Germany, Erlangen
Friedrich-alexander-universität Erlangen-nürnberg
Brun, François
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Brun, Pierre
France, Gif-sur-yvette
Cea Saclay
Bulk, Tomasz
Poland, Warsaw
University of Warsaw
Carrigan, Svenja
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Casanova, Sabrina
Germany, Heidelberg
Max-planck-institut Für Kernphysik
South Africa, Potchefstroom
North-west University
Chadwick, Paula M.
United Kingdom, Durham
Durham University
Chalmé-Calvet, Raphaël
France, Paris
In2p3 - Institut National de Physique Nucléaire et de Physique Des Particules
Chaves, Ryan C.G.
France, Gif-sur-yvette
Cea Saclay
Cheesebrough, A.
United Kingdom, Durham
Durham University
Chrétien, Mathieu
France, Paris
In2p3 - Institut National de Physique Nucléaire et de Physique Des Particules
Colafrancesco, Sergio
South Africa, Johannesburg
University of the Witwatersrand
Cologna, Gabriele
Germany, Heidelberg
Universität Heidelberg
Conrad, Jan
Sweden, Stockholm
Albanova Universitetscentrum
Sweden, Uppsala
Wallenberg Academy Fellow
Couturier, C.
France, Paris
In2p3 - Institut National de Physique Nucléaire et de Physique Des Particules
Cui, Yudong
Germany, Tubingen
Eberhard Karls Universität Tübingen
Dalton, Matthew L.
France, Paris
In2p3 - Institut National de Physique Nucléaire et de Physique Des Particules
United Kingdom
European Community
Daniel, Michael K.
United Kingdom, Durham
Durham University
Davids, Isak Delberth
Namibia, Windhoek
University of Namibia
South Africa, Potchefstroom
North-west University
Degrange, Bernard
France, Paris
In2p3 - Institut National de Physique Nucléaire et de Physique Des Particules
Deil, Christoph
Germany, Heidelberg
Max-planck-institut Für Kernphysik
DeWilt, P.
Australia, Adelaide
The University of Adelaide
Dickinson, Hugh J.
Sweden, Stockholm
Albanova Universitetscentrum
Djannati-Ataï, Arache
France, Paris
In2p3 - Institut National de Physique Nucléaire et de Physique Des Particules
Domainko, Wilfried F.
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Drury, Luke O'C
Ireland, Dublin
Institiúid Ard-lénn Bhaile Átha Cliath
Dubus, Guillaume
France, Saint Martin D'heres
Verimag
Dutson, Kate L.
United Kingdom, Leicester
University of Leicester
Dyks, Jarosław
Poland, Warsaw
Nicolaus Copernicus Astronomical Center of the Polish Academy of Sciences
Dyrda, Michael
Poland, Krakow
Henryk Niewodniczanski Institute of Nuclear Physics of the Polish Academy of Sciences
Edwards, Thomas D.P.
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Egberts, Kathrin
Austria, Innsbruck
Universität Innsbruck
Eger, Peter A.
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Espigat, P.
France, Paris
In2p3 - Institut National de Physique Nucléaire et de Physique Des Particules
Farnier, Christian
Sweden, Stockholm
Albanova Universitetscentrum
Fegan, Stephen J.
France, Paris
In2p3 - Institut National de Physique Nucléaire et de Physique Des Particules
Feinstein, Fabrice
France, Montpellier
Université de Montpellier
Fernandes, Milton Virgílio
Germany, Hamburg
Universität Hamburg
Fernandez, Diane
France, Montpellier
Université de Montpellier
Fiasson, Armand
France, Paris
In2p3 - Institut National de Physique Nucléaire et de Physique Des Particules
Fontaine, Gérard
France, Paris
In2p3 - Institut National de Physique Nucléaire et de Physique Des Particules
Förster, Andreas
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Füssling, Matthias
Germany, Potsdam
Universität Potsdam
Gajdus, Michael
Germany, Berlin
Humboldt-universität zu Berlin
Gallant, Yves A.
France, Montpellier
Université de Montpellier
Garrigoux, Tania
France, Paris
In2p3 - Institut National de Physique Nucléaire et de Physique Des Particules
Giavitto, Gianluca
Germany, Hamburg
Deutsches Elektronen-synchrotron Desy
Giebels, Berrie
France, Paris
In2p3 - Institut National de Physique Nucléaire et de Physique Des Particules
Glicenstein, Jean François
France, Gif-sur-yvette
Cea Saclay
Grondin, Marie Hélène
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Germany, Heidelberg
Universität Heidelberg
Grudzínska, Mira
Poland, Warsaw
University of Warsaw
Häffner, Stephanie
Germany, Erlangen
Friedrich-alexander-universität Erlangen-nürnberg
Hahn, Joachim
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Harris, Jonathan
United Kingdom, Durham
Durham University
Heinzelmann, Götz
Germany, Hamburg
Universität Hamburg
Henri, Gilles
France, Saint Martin D'heres
Verimag
Hermann, German
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Hervet, Olivier
France, Paris
Cnrs Centre National de la Recherche Scientifique
Hillert, Andreas
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Hinton, James A.J.A.
United Kingdom, Leicester
University of Leicester
Hofmann, Werner
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Hofverberg, Petter
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Holler, Markus
Germany, Potsdam
Universität Potsdam
Horns, Dieter
Germany, Hamburg
Universität Hamburg
Jachołkowska, Agnieszka
France, Paris
In2p3 - Institut National de Physique Nucléaire et de Physique Des Particules
Jahn, C.
Germany, Erlangen
Friedrich-alexander-universität Erlangen-nürnberg
Jamrozy, Marek
Poland, Krakow
Uniwersytet Jagielloński
Janiak, Mateusz
Poland, Warsaw
Nicolaus Copernicus Astronomical Center of the Polish Academy of Sciences
Jankowsky, Felix
Germany, Heidelberg
Universität Heidelberg
Jung-Richardt, Ira V.
Germany, Erlangen
Friedrich-alexander-universität Erlangen-nürnberg
Kastendieck, Max Anton
Germany, Hamburg
Universität Hamburg
Katarzyński, Krzysztof
Poland, Torun
Uniwersytet Mikołaja Kopernika w Toruniu
Katz, Ulrich F.
Germany, Erlangen
Friedrich-alexander-universität Erlangen-nürnberg
Kaufmann, Sarah
Germany, Heidelberg
Universität Heidelberg
Khélifi, Bruno
France, Paris
In2p3 - Institut National de Physique Nucléaire et de Physique Des Particules
Kieffer, M.
France, Paris
In2p3 - Institut National de Physique Nucléaire et de Physique Des Particules
Klepser, Stefan
Germany, Hamburg
Deutsches Elektronen-synchrotron Desy
Klochkov, Dmitry K.
Germany, Tubingen
Eberhard Karls Universität Tübingen
Klužniak, Wlodzimierz
Poland, Warsaw
Nicolaus Copernicus Astronomical Center of the Polish Academy of Sciences
Kneiske, Tanja M.
Germany, Hamburg
Universität Hamburg
Kolitzus, D.
Austria, Innsbruck
Universität Innsbruck
Komin, Nukri
France, Paris
In2p3 - Institut National de Physique Nucléaire et de Physique Des Particules
Kosack, Karl
France, Gif-sur-yvette
Cea Saclay
Krakau, S.
Germany, Bochum
Ruhr-universitat Bochum
Krayzel, Fabien
France, Paris
In2p3 - Institut National de Physique Nucléaire et de Physique Des Particules
Krüger, P. P.
Germany, Heidelberg
Max-planck-institut Für Kernphysik
South Africa, Potchefstroom
North-west University
Laffon, Hélène
France, Paris
In2p3 - Institut National de Physique Nucléaire et de Physique Des Particules
Lamanna, Giovanni
France, Paris
In2p3 - Institut National de Physique Nucléaire et de Physique Des Particules
Lemière, Anne
France, Paris
In2p3 - Institut National de Physique Nucléaire et de Physique Des Particules
Lemoine-Goumard, Marianne
France, Paris
In2p3 - Institut National de Physique Nucléaire et de Physique Des Particules
Lenain, Jean Philippe
France, Paris
In2p3 - Institut National de Physique Nucléaire et de Physique Des Particules
Lohse, Thomas
Germany, Berlin
Humboldt-universität zu Berlin
Lu, Chiachun
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Marandon, Vincent
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Marcowith, Alexandre
France, Montpellier
Université de Montpellier
Marx, Ramin
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Maurin, Guillaume T.
France, Paris
In2p3 - Institut National de Physique Nucléaire et de Physique Des Particules
Maxted, Nigel I.
Australia, Adelaide
The University of Adelaide
Mayer, Michael
Germany, Potsdam
Universität Potsdam
McComb, T. J.Lowry
United Kingdom, Durham
Durham University
Méhault, Jérémie
France, Paris
In2p3 - Institut National de Physique Nucléaire et de Physique Des Particules
United Kingdom
European Community
Meintjes, Pieter J.
South Africa, Bloemfontein
University of the Free State
Meyer, Manuel S.
Sweden, Stockholm
Albanova Universitetscentrum
Moderski, Rafaƚ
Poland, Warsaw
Nicolaus Copernicus Astronomical Center of the Polish Academy of Sciences
Moulin, E.
France, Gif-sur-yvette
Cea Saclay
Murach, Thomas
Germany, Berlin
Humboldt-universität zu Berlin
de Naurois, Mathieu
France, Paris
In2p3 - Institut National de Physique Nucléaire et de Physique Des Particules
Niemiec, Jacek
Poland, Krakow
Henryk Niewodniczanski Institute of Nuclear Physics of the Polish Academy of Sciences
Nolan, Sam J.
United Kingdom, Durham
Durham University
Ohm, Stefan
United Kingdom, Leicester
University of Leicester
De Oña Wilhelmi, Emma
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Ostrowski, Michałl
Poland, Krakow
Uniwersytet Jagielloński
Oya, Igor
Germany, Berlin
Humboldt-universität zu Berlin
Panter, M.
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Parsons, Robert Daniel
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Pekeur, Nikki W.
South Africa, Potchefstroom
North-west University
Pelletier, Guy
France, Saint Martin D'heres
Verimag
Petrucci, Pierre Olivier
France, Saint Martin D'heres
Verimag
Pita, Santiago
France, Paris
In2p3 - Institut National de Physique Nucléaire et de Physique Des Particules
Poon, Helen
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Pûhlhofer, Gerd
Germany, Tubingen
Eberhard Karls Universität Tübingen
Punch, Michael
France, Paris
In2p3 - Institut National de Physique Nucléaire et de Physique Des Particules
Quirrenbach, Andreas
Germany, Heidelberg
Universität Heidelberg
Raue, Martin
Germany, Hamburg
Universität Hamburg
Reimer, Anita
Austria, Innsbruck
Universität Innsbruck
Reimer, Olaf
Austria, Innsbruck
Universität Innsbruck
Renaud, Matthieu
France, Montpellier
Université de Montpellier
De Los Reyes, Raquel R.
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Rieger, Frank M.
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Rob, L.
Czech Republic, Prague
Charles University
Rosier-Lees, Sylvie
France, Paris
In2p3 - Institut National de Physique Nucléaire et de Physique Des Particules
Rowell, Gavin P.
Australia, Adelaide
The University of Adelaide
Rudak, Bronisław
Poland, Warsaw
Nicolaus Copernicus Astronomical Center of the Polish Academy of Sciences
Rulten, Cameron B.
France, Paris
Cnrs Centre National de la Recherche Scientifique
Sahakian, Vardan H.
Armenia, Yerevan
National Academy of Sciences of the Republic of Armenia
Armenia, Yerevan
Yerevan Physics Institute
Sánchez, David A.
France, Paris
In2p3 - Institut National de Physique Nucléaire et de Physique Des Particules
Santangelo, Andrea E.
Germany, Tubingen
Eberhard Karls Universität Tübingen
Schlickeiser, Reinhard
Germany, Bochum
Ruhr-universitat Bochum
Schüssler, Fabian
France, Gif-sur-yvette
Cea Saclay
Schwanke, Ullrich
Germany, Berlin
Humboldt-universität zu Berlin
Schwarzburg, S.
Germany, Tubingen
Eberhard Karls Universität Tübingen
Sol, Hélène
France, Paris
Cnrs Centre National de la Recherche Scientifique
Spengler, Gerrit
Germany, Berlin
Humboldt-universität zu Berlin
Stawarz, Łukasz
Poland, Krakow
Uniwersytet Jagielloński
Steenkamp, R.
Namibia, Windhoek
University of Namibia
Stegmann, Christian
Germany, Hamburg
Deutsches Elektronen-synchrotron Desy
Germany, Potsdam
Universität Potsdam
Stinzing, Friedrich
Germany, Erlangen
Friedrich-alexander-universität Erlangen-nürnberg
Sushch, Iurii
Germany, Berlin
Humboldt-universität zu Berlin
South Africa, Potchefstroom
North-west University
Tavernet, Jean Paul
France, Paris
In2p3 - Institut National de Physique Nucléaire et de Physique Des Particules
Terrier, Régis
France, Paris
In2p3 - Institut National de Physique Nucléaire et de Physique Des Particules
Tluczykont, Martin
Germany, Hamburg
Universität Hamburg
Valerius, Kathrin
Germany, Erlangen
Friedrich-alexander-universität Erlangen-nürnberg
Van Eldik, Christopher
Germany, Erlangen
Friedrich-alexander-universität Erlangen-nürnberg
van Soelen, Brian V.A.N.
South Africa, Bloemfontein
University of the Free State
Vasileiadis, Georges
France, Montpellier
Université de Montpellier
Venter, C.
South Africa, Potchefstroom
North-west University
Viana, Aion A.
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Vincent, P.
France, Paris
In2p3 - Institut National de Physique Nucléaire et de Physique Des Particules
Volpe, Francesca
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Vorster, Michael J.
South Africa, Potchefstroom
North-west University
Wagner, Stefan J.
Germany, Heidelberg
Universität Heidelberg
Wagner, Philipp
Germany, Berlin
Humboldt-universität zu Berlin
Ward, Martin J.
United Kingdom, Durham
Durham University
Weidinger, Matthias
Germany, Bochum
Ruhr-universitat Bochum
White, Richard J.
United Kingdom, Leicester
University of Leicester
Wierzcholska, Alicja
Poland, Krakow
Uniwersytet Jagielloński
Wouters, Denis
France, Gif-sur-yvette
Cea Saclay
Yang, Ruizhi
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Zabalza, Víctor
Germany, Heidelberg
Max-planck-institut Für Kernphysik
United Kingdom, Leicester
University of Leicester
Zacharias, Michael
Germany, Bochum
Ruhr-universitat Bochum
Zech, Andreas
France, Paris
Cnrs Centre National de la Recherche Scientifique
Zechlin, Hannes
Germany, Hamburg
Universität Hamburg
Acero, Fabio
France, Gif-sur-yvette
Astrophysique, Instrumentation et Modélisation de Paris-saclay
Casandjian, Jean Marc
France, Gif-sur-yvette
Astrophysique, Instrumentation et Modélisation de Paris-saclay
Cohen-Tanugi, Johann
France, Montpellier
Université de Montpellier
Giordano, Francesco
Italy, Bari
Politecnico Di Bari
Italy, Bari
Istituto Nazionale Di Fisica Nucleare, Sezione Di Bari
Guillemot, Lucas
France, Orleans
Laboratoire de Physique et de Chimie de L'environnement et de L'espace Lpc2e
France, Nancay
Station de Radioastronomie de Nancay
Lande, Joshua
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
Pletsch, Holger J.
Germany, Potsdam
Max-planck-institut Für Gravitationsphysik Albert-einstein-institut
Germany, Hannover
Gottfried Wilhelm Leibniz Universität Hannover
Uchiyama, Yasunobu
Japan, Tokyo
Rikkyo University
Statistics
Citations: 17
Authors: 200
Affiliations: 45
Identifiers
Doi:
10.1051/0004-6361/201322694
ISSN:
00046361
Research Areas
Environmental