A low level of extragalactic background light with gamma-ray spectra from distant blazars

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

doi:10.1038/nature04680

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A low level of extragalactic background light with gamma-ray spectra from distant blazars

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A low level of extragalactic background light with gamma-ray spectra from distant blazars

F. Aharonian, A.G. Akhperjanian, A.R. Bazer-Bachi, M. Beilicke, W. Benbow, D. Berge, K. Bernlöhr, C. Boisson, O. Bolz, V. Borrel, …

Nature, Vol.440, pp.1018-1021

2006

DOI: https://doi.org/10.1038/nature04680

Résumé

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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Titre: A low level of extragalactic background light with gamma-ray spectra from distant blazars
Créateurs - sans rôle: F. Aharonian - Max Planck Institute for Nuclear Physics
A.G. Akhperjanian - A. Alikhanyan National Laboratory
A.R. Bazer-Bachi - Université Toulouse III - Paul Sabatier
M. Beilicke - Universität Hamburg
W. Benbow - Max Planck Institute for Nuclear Physics
D. Berge - Max Planck Institute for Nuclear Physics
K. Bernlöhr - Max Planck Institute for Nuclear Physics
C. Boisson - Observatoire de Paris
O. Bolz - Max Planck Institute for Nuclear Physics
V. Borrel - Université Toulouse III - Paul Sabatier
I. Braun - Max Planck Institute for Nuclear Physics
F. Breitling - Humboldt-Universität zu Berlin
A.M. Brown - Durham University
P.M. Chadwick - Durham University
L.-M. Chounet - Laboratoire Leprince-Ringuet
R. Cornils - Hamburg Institut
L. Costamante - Associated Research
B. Degrange - École Polytechnique
H.J. Dickinson - Durham University
A. Djannati-Ataï - AstroParticule et Cosmologie
L. O'C. Drury
G. Dubus - Laboratoire Leprince-Ringuet
D. Emmanoulopoulos
P. Espigat - AstroParticule et Cosmologie
F. Feinstein - Université de Montpellier
G. Fontaine - Laboratoire Leprince-Ringuet
Y. Fuchs - Université Joseph Fourier
S. Funk - Max Planck Institute for Nuclear Physics
Y.A. Gallant - Laboratoire de Physique Théorique
B. Giebels - Laboratoire Leprince-Ringuet
S. Gillessen - Max Planck Institute for Nuclear Physics
J.F. Glicenstein - Commissariat à l'Énergie Atomique et aux Énergies Alternatives
P. Goret - Commissariat à l'Énergie Atomique et aux Énergies Alternatives
C. Hadjichristidis - Durham University
M. Hauser
G. Heinzelmann - Universität Hamburg
G. Henri - Centre National de la Recherche Scientifique
G. Hermann - Max Planck Institute for Nuclear Physics
J.A. Hinton - Max Planck Institute for Nuclear Physics
W. Hofmann - Max Planck Institute for Nuclear Physics
M. Holleran - North-West University
D. Horns - Max Planck Institute for Nuclear Physics
A. Jacholkowska - Laboratoire de Physique Théorique
O.C. Dejager
B. Khélifi - Max Planck Institute for Nuclear Physics
Nu. Komin - Humboldt-Universität zu Berlin
A. Konopelko - Humboldt-Universität zu Berlin
I.J. Latham - Durham University
R. Le Gallou - Durham University
A. Lemière - AstroParticule et Cosmologie
M. Lemoine-Goumard - École Polytechnique
N. Leroy - Centre National de la Recherche Scientifique
T. Lohse - Humboldt-Universität zu Berlin
J.M. Martin - Centre National de la Recherche Scientifique
O. Martineau-Huynh - Laboratoire de Physique Nucléaire et de Hautes Énergies
A. Marcowith
C. Masterson - Max Planck Institute for Nuclear Physics
T. J. L. Mccomb - Durham University
M. de Naurois - Sorbonne Université
S.J. Nolan - Durham University
A. Noutsos - Durham University
K.J. Orford - Durham University
J.L. Osborne - Durham University
M. Ouchrif - Centre National de la Recherche Scientifique
M. Panter - Max Planck Institute for Nuclear Physics
G. Pelletier - Centre National de la Recherche Scientifique
S. Pita - AstroParticule et Cosmologie
G. Pühlhofer
M. Punch - AstroParticule et Cosmologie
B.C. Raubenheimer - North-West University
M. Raue - Universität Hamburg
J. Raux - Laboratoire de Physique Nucléaire et de Hautes Énergies
S.M. Rayner - Durham University
A. Reimer - Ruhr University Bochum
O. Reimer - Ruhr University Bochum
J. Ripken - Hamburg Institut
L. Rob - Charles University
L. Rolland - Sorbonne Université
G. Rowell - Max Planck Institute for Nuclear Physics
V. Sahakian - A. Alikhanyan National Laboratory
L. Saugé - Université Joseph Fourier
S. Schlenker - Humboldt-Universität zu Berlin
R. Schlickeiser - Ruhr University Bochum
C. Schuster - Ruhr University Bochum
U. Schwanke - Humboldt-Universität zu Berlin
M. Siewert - Ruhr University Bochum
H. Sol - Observatoire de Paris
D. Spangler - Durham University
R. Steenkamp - University of Namibia
C. Stegmann - Humboldt-Universität zu Berlin
J.-P. Tavernet - Laboratoire de Physique Nucléaire et de Hautes Énergies
R. Terrier - AstroParticule et Cosmologie
C.G. Théoret - AstroParticule et Cosmologie
M. Tluczykont - École Polytechnique
G. Vasileiadis - Institut National de Physique Nucléaire et de Physique des Particules
C. Venter - North-West University
P. Vincent - North-West University
H.J. Völk
S.J. Wagner
Détails de publication: Nature, Vol.440, pp.1018-1021
Identifiants: 99152883509311
Unité académique: Université de Montpellier
Langue: English
Type de ressource: Journal article
Champs locaux: in2p3-00024536