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  Energy dependent gamma-ray morphology in the Pulsar wind nebula HESS J1825-137

Aharonian, F., Akhperjanian, A. G., Bazer-Bachi, A. R., Beilicke, M., Benbow, W., Berge, D., et al. (2006). Energy dependent gamma-ray morphology in the Pulsar wind nebula HESS J1825-137. Astronomy & Astrophysics, 460, 365-374. Retrieved from http://xxx.lanl.gov/abs/astro-ph/0607548.

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Aharonian, Felix1, Author           
Akhperjanian, A. G.1, Author           
Bazer-Bachi, A. R.2, Author
Beilicke, M.1, Author           
Benbow, Wystan1, Author           
Berge, David1, Author           
Bernlöhr, K.1, Author           
Boisson, C.2, Author
Bolz, Oliver1, Author           
Borrel, V.2, Author
Braun, Isabel1, Author           
Brown, A. M.2, Author
Bühler, Rolf1, Author           
Büsching, I.2, Author
Carrigan, Svenja1, Author           
Chadwick, P. M.2, Author
Chounet, L.-M.2, Author
Cornils, R.1, Author           
Costamante, L.1, Author           
Degrange, B.2, Author
Djannati-Atai, A.1, Author           Drury, L.O'C.2, AuthorEmmanoulopoulos, D.2, AuthorEspigat, P.2, AuthorFeinstein, F.1, Author           Ferrero, E.2, AuthorFontaine, G.2, AuthorFunk, S.1, Author           Gallant, Y. A.1, Author           Giebels, B.2, AuthorGlicenstein, J. F.2, AuthorGoret, P.2, AuthorHadjichristidis, C.2, AuthorHauser, Dominik1, Author           Hauser, M.2, AuthorHeinzelmann, G.2, AuthorHenri, G.2, AuthorHermann, G.1, Author           Hinton, J. A.1, Author           Hofmann, W.1, Author           Holleran, M.2, AuthorHorns, D.1, Author           de Jager, O. C.2, AuthorKhélifi, B.1, Author           Komin, N.2, AuthorKonopelko, A.3, Author           Latham, I. J.2, AuthorLe Gallou, R.2, AuthorLemière, A.2, AuthorLemoine-Goumard, M.2, AuthorLohse, T.2, AuthorMartineau-Huynh, O.2, AuthorMarcowith, A.2, AuthorMasterson, C.1, Author           McComb, T. J. L.2, Authorde Naurois, M.1, Author           Nedbal, Dalibor1, Author           Nolan, S. J.2, AuthorNoutsos, A.2, AuthorOrford, K. J.1, Author           Osborne, J. L.1, Author           Ouchrif, M.2, AuthorPanter, Michael1, Author           Pelletier, G.2, AuthorPita, S.2, AuthorPühlhofer, G.1, Author           Punch, M.2, AuthorRaubenheimer, B. C.2, AuthorRaue, M.1, Author           Rayner, S. M.2, AuthorReimer, A.2, AuthorReimer, O.2, AuthorRipken, J.2, AuthorRob, L.2, AuthorRolland, L.2, AuthorRowell, Gavin1, Author           Sahakian, V.2, AuthorSaugé, L.1, Author           Schlenker, S.2, AuthorSchlickeiser, R.2, AuthorSchröder, R.2, AuthorSchwanke, U.2, AuthorSol, H.2, AuthorSpangler, D.2, AuthorSteenkamp, R.2, AuthorStegmann, C.2, AuthorTavernet, J.-P-2, AuthorTerrier, R.2, AuthorTluczykont, M.2, AuthorVasileiadis, G.1, Author           Venter, C.2, AuthorVincent, P.2, AuthorVölk, H. J.3, Author           Wagner, S. J.2, AuthorWard, M.2, AuthorBolz, O.1, Author           Dickinson, H. J.2, AuthorDubus, G.1, Author           Egberts, Kathrin1, Author           Fiasson, A.2, AuthorFunk, S.1, Author           Jacholkowska, A.2, AuthorKosack, K.1, Author           Martin, J. M.2, AuthorSpanier, F.2, AuthorSuperina, G.2, Authorvan Eldik, C.1, Author           Funk, Seb.2, AuthorF. Aharonian et al. for the H.E.S.S. Collaboration, Editor   more..
Affiliations:
1Division Prof. Dr. Werner Hofmann, MPI for Nuclear Physics, Max Planck Society, ou_904550              
2Yerevan Physics Institute, 2 Alikhanian Brothers St., 375036 Yerevan, Armenia Centre d'Étude Spatiale des Rayonnements, CNRS/UPS, 9 Av. du Colonel Roche, BP 4346, 31029 Toulouse Cedex 4, France Universität Hamburg, Institut für Experimentalphysik, Luruper Chaussee 149, 22761 Hamburg, Germany Institut für Physik, Humboldt-Universität zu Berlin, Newtonstr. 15, 12489 Berlin, Germany LUTH, UMR 8102 du CNRS, Observatoire de Paris, Section de Meudon, 92195 Meudon Cedex, France University of Durham, Department of Physics, South Road, Durham DH1 3LE, UK Unit for Space Physics, North-West University, Potchefstroom 2520, South Africa Laboratoire Leprince-Ringuet, IN2P3/CNRS, École Polytechnique, 91128 Palaiseau, France European Associated Laboratory for Gamma-Ray Astronomy, jointly supported by CNRS and MPG APC, 11 place Marcelin Berthelot, 75231 Paris Cedex 05, France Dublin Institute for Advanced Studies, 5 Merrion Square, Dublin 2, Ireland Landessternwarte, Universität Heidelberg, Königstuhl, 69117 Heidelberg, Germany Laboratoire de Physique Théorique et Astroparticules, IN2P3/CNRS, Université Montpellier II, CC 70, Place Eugène Bataillon, 34095 Montpellier Cedex 5, France DAPNIA/DSM/CEA, CE Saclay, 91191 Gif-sur-Yvette, Cedex, France Laboratoire d'Astrophysique de Grenoble, INSU/CNRS, Université Joseph Fourier, BP 53, 38041 Grenoble Cedex 9, France Institut für Astronomie und Astrophysik, Universität Tübingen, Sand 1, 72076 Tübingen, Germany Laboratoire de Physique Nucléaire et de Hautes Énergies, IN2P3/CNRS, Universités Paris VI & VII, 4 place Jussieu, 75252 Paris Cedex 5, France Institute of Particle and Nuclear Physics, Charles University, V Holesovickach 2, 180 00 Prague 8, Czech Republic Institut für Theoretische Physik, Lehrstuhl IV: Weltraum und Astrophysik, Ruhr-Universität Bochum, 44780 Bochum, Germany University of Namibia, Private Bag 13301, Windhoek, Namibia, ou_persistent22              
3Prof. Heinrich J. Völk, Emeriti, MPI for Nuclear Physics, Max Planck Society, ou_907548              

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 Abstract: Detailed morphological and spatially resolved spectral studies reveal the very high-energy (VHE) gamma-ray aspects of this object with unprecedented precision. We confirm previous results obtained in a survey of the Galactic Plane in 2004. The gamma-ray emission extends asymmetrically to the south and south-west of the energetic pulsar PSR J1826-1334, that is thought to power the pulsar wind nebula. The differential gamma-ray spectrum of the whole emission region is measured over more than two orders of magnitude, from 270 GeV to 35 TeV, and shows indications for a deviation from a pure power law. Spectra have also been determined for spatially separated regions of HESS J1825-137. The photon indices from a power-law fit in the different regions show a softening of the spectrum with increasing distance from the pulsar and therefore an energy dependent morphology. This is the first time that an energy dependent morphology has been detected in the VHE gamma-ray regime. The VHE gamma-ray emission of HESS J1825-137 is phenomenologically discussed in the scenario where the gamma-rays are produced by VHE electrons via Inverse Compton scattering. The high gamma-ray luminosity of the source cannot be explained on the basis of constant spin-down power of the pulsar and requires higher injection power in past.

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Language(s): eng - English
 Dates: 2006-06
 Publication Status: Issued
 Pages: -
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 Table of Contents: -
 Rev. Type: Peer
 Identifiers: eDoc: 292018
URI: http://xxx.lanl.gov/abs/astro-ph/0607548
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Title: Astronomy & Astrophysics
Source Genre: Journal
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Pages: - Volume / Issue: 460 Sequence Number: - Start / End Page: 365 - 374 Identifier: -