Resolving the Extragalactic Background Light with gamma-ray spectra from 
distant blazars

Aharonian, F.; Akhperjanian, A. G.; Bazer-Bachi, A. R.; Beilicke, M.; Benbow, W.; Berge, D.; Borrel, V.; Bernlöhr, K.; Bolz, O.; Boisson, C:; Glicenstein, J.F.; Breitling, F.; Brown, A. M.; Dickinson, H.J.; Chadwick, P. M.; Braun, I.; Chounet, L.-M.; Cornils, R.; Costamante, L.; Degrange, B.; Djannati-Atai, A.; Drury, L.O'C.; Emmanoulopoulos, D.; Espigat, P.; Feinstein, F.; Jacholkowska, A.; Fontaine, G.; Funk, S.; Gallant, Y. A.; Giebels, B.; Gillessen, S.; Goret, P.; Dubus, G.; Hadjichristidis, C.; Hauser, M.; Heinzelmann, G.; Henri, G.; Hermann, G.; Hinton, J. A.; Hofmann, W.; Holleran, M.; Horns, D.; de Jager, O. C.; Khélifi, B.; Komin, N.; Konopelko, A.; Latham, I. J.; Le Gallou, R.; Lemoine-Goumard, M.; Lemière, A.; Leroy, N.; Lohse, T.; Marcowith, A.; Masterson, C.; McComb, T. J. L.; de Naurois, M.; Nolan, S. J.; Noutsos, A.; Orford, K. J.; Osborne, J. L.; Ouchrif, M.; Panter, M.; Pelletier, G.; Pita, S.; Fuchs, Y.; Pühlhofer, G.; Punch, M.; Raubenheimer, B. C.; Raue, M.; Raux, J.; Rayner, S. M.; Martin, J.M.; Reimer, A.; Reimer, O.; Ripken, J.; Terrier, R.; Rob, L.; Rolland, L.; Rowell, G.; Sahakian, V.; Saugé, L.; Schlenker, S.; Schlickeiser, R.; Schuster, C.; Schwanke, U.; Siewert, M.; Sol, H.; Steenkamp, R.; Stegmann, C.; Tavernet, J.-P-; Théoret, C. G.; Tluczykont, M.; Venter, C.; Vasileiadis, G.; Vincent, P.; Völk, H. J.; Wagner, S. J.; Martineau-Huynh, O.; Spangler, D.; van Eldik, C.

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Resolving the Extragalactic Background Light with gamma-ray spectra from distant blazars

Aharonian, F., Akhperjanian, A. G., Bazer-Bachi, A. R., Beilicke, M., Benbow, W., Berge, D., et al. (n.d.). Resolving the Extragalactic Background Light with gamma-ray spectra from distant blazars. Nature. Retrieved from http://de.arXiv.org/abs/astro-ph/0508073.

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Item Permalink: https://hdl.handle.net/11858/00-001M-0000-0011-864A-A Version Permalink: https://hdl.handle.net/11858/00-001M-0000-0011-864B-8

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Creators:
Aharonian, F.¹, Author
Akhperjanian, A. G.¹, Author
Bazer-Bachi, A. R.², Author
Beilicke, M.¹, Author
Benbow, W.¹, Author
Berge, D.¹, Author
Borrel, V.², Author
Bernlöhr, K.¹, Author
Bolz, O.¹, Author
Boisson, C:², Author
Glicenstein, J.F.¹, Author
Breitling, F.², Author
Brown, A. M.², Author
Dickinson, H.J.², Author
Chadwick, P. M.², Author
Braun, I.¹, 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         Jacholkowska, A.², AuthorFontaine, G.², AuthorFunk, S.¹, Author         Gallant, Y. A.¹, Author         Giebels, B.², AuthorGillessen, S.¹, Author         Goret, P.², AuthorDubus, G.¹, Author         Hadjichristidis, C.², AuthorHauser, 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, AuthorLemoine-Goumard, M.², AuthorLemière, A.², AuthorLeroy, N.², AuthorLohse, T.², AuthorMarcowith, A.², AuthorMasterson, C.¹, Author         McComb, T. J. L.², Authorde Naurois, M.¹, Author         Nolan, S. J.², AuthorNoutsos, A.², AuthorOrford, K. J.¹, Author         Osborne, J. L.¹, Author         Ouchrif, M.², AuthorPanter, M.¹, Author         Pelletier, G.², AuthorPita, S.², AuthorFuchs, Y.², AuthorPühlhofer, G.¹, Author         Punch, M.², AuthorRaubenheimer, B. C.², AuthorRaue, M.¹, Author         Raux, J.², AuthorRayner, S. M.², AuthorMartin, J.M.², AuthorReimer, A.², AuthorReimer, O.², AuthorRipken, J.², AuthorTerrier, R.², AuthorRob, L.², AuthorRolland, L.², AuthorRowell, G.¹, Author         Sahakian, V.², AuthorSaugé, L.¹, Author         Schlenker, S.², AuthorSchlickeiser, R.², AuthorSchuster, C.², AuthorSchwanke, U.², AuthorSiewert, M.², AuthorSol, H.², AuthorSteenkamp, R.², AuthorStegmann, C.², AuthorTavernet, J.-P-², AuthorThéoret, C. G.², AuthorTluczykont, M.², AuthorVenter, C.², AuthorVasileiadis, G.¹, Author         Vincent, P.², AuthorVölk, H. J.³, Author         Wagner, S. J.², AuthorMartineau-Huynh, O.², AuthorSpangler, D.², Authorvan Eldik, C.¹, Author          more..

Affiliations:
1Division Prof. Dr. Werner Hofmann, MPI for Nuclear Physics, Max Planck Society, ou_904550
2Max-Planck-Institut für Kernphysik, Post Office Box 103980, D-69029 Heidelberg, Germany. Yerevan Physics Institute, 2 Alikhanian Brothers Street, 375036 Yerevan, Armenia. Department of Physics, University of Durham, South Road, Durham DH1 3LE, UK. Centre d'Etude Spatiale des Rayonnements, CNRS/UPS, 9 av. du Colonel Roche, BP 4346, F-31029 Toulouse Cedex 4, France. Institut für Experimentalphysik, Universität Hamburg, Luruper Chaussee 149, D-22761 Hamburg, Germany. APC, UMR 7164 du CNRS, 11 Place Marcelin Berthelot, F-75231 Paris Cedex 05, France. Institut für Physik, Humboldt-Universität zu Berlin, Newtonstr. 15, D-12489 Berlin, Germany. Laboratoire Univers et Théories (LUTH), UMR 8102 du CNRS, Observatoire de Paris, Section de Meudon, F-92195 Meudon Cedex, France. Laboratoire de Physique Théorique et Astroparticules, IN2P3/CNRS, Université Montpellier II, CC 70, Place Eugène Bataillon, F-34095 Montpellier Cedex 5, France. Laboratoire Leprince-Ringuet, IN2P3/CNRS, Ecole Polytechnique, F-91128 Palaiseau, France. Dublin Institute for Advanced Studies, 5 Merrion Square, Dublin 2, Ireland. Landessternwarte, Königstuhl, D-69117 Heidelberg, Germany. Laboratoire d'Astrophysique de Grenoble, INSU/CNRS, Université Joseph Fourier, BP 53, F-38041 Grenoble Cedex 9, France. DAPNIA/DSM/CEA, CE Saclay, F-91191 Gif-sur-Yvette, France. Unit for Space Physics, North-West University, Potchefstroom 2520, South Africa. Laboratoire de Physique Nucléaire et de Hautes Energies, IN2P3/CNRS, Universités Paris VI & VII, 4 Place Jussieu, F-75252 Paris Cedex 05, France. Institut für Theoretische Physik, Lehrstuhl IV: Weltraum und Astrophysik, Ruhr-Universität Bochum, D-44780 Bochum, Germany. Institute of Particle and Nuclear Physics (IPNP), Charles University, V Holesovickach 2, 180 00 Prague 8, Czech Republic. 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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Free keywords: Galaxies Gamma rays: observations H.E.S.S.

Abstract: The diffuse Extragalactic Background Light (EBL) contains unique information about the epochs of formation and the history of evolution of galaxies. Unfortunately, direct measurements are subject to large systematic uncertainties due to the difficulties in the accurate model-based subtraction of the bright foregrounds. An alternative approach is based on the detection and identification of EBL absorption features in high-energy spectra of objects of known redshift. Here we exploit this method on the blazars H 2356-309 (z=0.165) and 1ES 1101-232 (z=0.186), newly discovered at TeV energies by the H.E.S.S. Collaboration. They are the most distant sources with measured spectra known so far at these energies. Their hard spectra provide the most stringent upper limit to date on the EBL in the Opt--NIR band, which appears significantly lower than expected from the current "direct" estimates and very close to the absolute lower limit represented by the integrated light of resolved galaxies. In addition to important cosmological implications, this result shows that the intergalactic space is more transparent to gamma-rays than previously thought, expanding the horizon of the TeV Universe.

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Language(s): eng - English

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Identifiers: eDoc: 240063
URI: http://de.arXiv.org/abs/astro-ph/0508073

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Title: Nature

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