First detection of a VHE gamma-ray spectral maximum from a Cosmic source: H.E.S.S. discovery of the Vela X nebula

F. Aharonian; A.G. Akhperjanian; A.R. Bazer-Bachi; M. Beilicke; Wystan Benbow; David Berge; K. Bernlohr; C. Boisson; O. Bolz; V. Borrel; I. Braun; F. Breitling; A.M. Brown; R. Buhler; S. Carrigan; P.M. Chadwick; L.-M. Chounet; R. Cornils; L. Costamante; B. Degrange; H.J. Dickinson; A. Djannati-Atai; L.O'C. Drury; G. Dubus; K. Egberts; D. Emmanoulopoulos; P. Espigat; F. Feinstein; G. Fontaine; S. Funk; Y. Gallant; B. Giebels; J.F. Glicenstein; P. Goret; C. Hadjichristidis; D. Hauser; M. Hauser; G. Heinzelmann; G. Henri; G. Hermann; J.A. Hinton; W. Hofmann; M. Holleran; Dieter Horns; A. Jacholkowska; O.C. de Jager; B. Khelifi; S. Klages; Nu. Komin; A. Konopelko; I.J. Latham; R. Le Gallou; A. Lemiere; M. Lemoine-Goumard; T. Lohse; J.M. Martin; O. Martineau-Huynh; A. Marcowith; C. Masterson; T.J.L. Mccomb; M. de Naurois; D. Nedbal; S.J. Nolan; A. Noutsos; K.J. Orford; J.L. Osborne; M. Ouchrif; M. Panter; G. Pelletier; S. Pita; G. Puhlhofer; M. Punch; B.C. Raubenheimer; M. Raue; S.M. Rayner; A. Reimer; O. Reimer; J. Ripken; L. Rob; L. Rolland; G. Rowell; V. Sahakian; L. Sauge; S. Schlenker; R. Schlickeiser; C. Schuster; U. Schwanke; M. Siewert; H. Sol; D. Spangler; R. Steenkamp; C. Stegmann; G. Superina; J.-P. Tavernet; R. Terrier; C.G. Theoret; M. Tluczykont; C. van Eldik; G. Vasileiadis; C. Venter; P. Vincent; H.J. Volk; S.J. Wagner; M. Ward

doi:10.1051/0004-6361:200600014

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First detection of a VHE gamma-ray spectral maximum from a Cosmic source: H.E.S.S. discovery of the Vela X nebula

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First detection of a VHE gamma-ray spectral maximum from a Cosmic source: H.E.S.S. discovery of the Vela X nebula

F. Aharonian, A.G. Akhperjanian, A.R. Bazer-Bachi, M. Beilicke, Wystan Benbow, David Berge, K. Bernlohr, C. Boisson, O. Bolz, V. Borrel, …

Astronomy & Astrophysics - A&A, Vol.448, pp.L43-L47

2006

DOI: https://doi.org/10.1051/0004-6361:200600014

Résumé

The Vela supernova remnant (SNR) is a complex region containing a number of sources of non-thermal radiation. The inner section of this SNR, within 2 degrees of the pulsar PSR B0833-45, has been observed by the H.E.S.S. gamma-ray atmospheric Cherenkov detector in 2004 and 2005. A strong signal is seen from an extended region to the south of the pulsar, within an integration region of radius 0.8 deg. around the position (RA = 08h 35m 00s, dec = -45 deg. 36' J2000.0). The excess coincides with a region of hard X-ray emission seen by the ROSAT and ASCA satellites. The observed energy spectrum of the source between 550 GeV and 65 TeV is well fit by a power law function with photon index = 1.45 +/- 0.09(stat) +/- 0.2(sys) and an exponential cutoff at an energy of 13.8 +/- 2.3(stat) +/- 4.1(sys) TeV. The integral flux above 1 TeV is (1.28 +/- 0.17 (stat) +/- 0.38(sys)) x 10^{-11} cm^{-2} s^{-1}. This result is the first clear measurement of a peak in the spectral energy distribution from a VHE gamma-ray source, likely related to inverse Compton emission. A fit of an Inverse Compton model to the H.E.S.S. spectral energy distribution gives a total energy in non-thermal electrons of ~2 x 10^{45} erg between 5 TeV and 100 TeV, assuming a distance of 290 parsec to the pulsar. The best fit electron power law index is 2.0, with a spectral break at 67 TeV.

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Titre: First detection of a VHE gamma-ray spectral maximum from a Cosmic source: H.E.S.S. discovery of the Vela X nebula
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
Wystan Benbow - Max Planck Institute for Nuclear Physics
David Berge - Max Planck Institute for Nuclear Physics
K. Bernlohr - Max Planck Institute for Nuclear Physics
C. Boisson - Centre National de la Recherche Scientifique
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
R. Buhler - Max Planck Institute for Nuclear Physics
S. Carrigan - Max Planck Institute for Nuclear Physics
P.M. Chadwick - Durham University
L.-M. Chounet - Laboratoire Leprince-Ringuet
R. Cornils - Universität Hamburg
L. Costamante - Max Planck Institute for Nuclear Physics
B. Degrange - École Polytechnique
H.J. Dickinson - Durham University
A. Djannati-Atai - AstroParticule et Cosmologie
L.O'C. Drury
G. Dubus - Centre National de la Recherche Scientifique
K. Egberts - Max Planck Institute for Nuclear Physics
D. Emmanoulopoulos - Heidelberg University
P. Espigat - Commissariat à l'Énergie Atomique et aux Énergies Alternatives
F. Feinstein - Centre National de la Recherche Scientifique
G. Fontaine - Laboratoire Leprince-Ringuet
S. Funk - Humboldt-Universität zu Berlin
Y. Gallant - Laboratoire de Physique Théorique
B. Giebels - Laboratoire Leprince-Ringuet
J.F. Glicenstein - Commissariat à l'Énergie Atomique et aux Énergies Alternatives
P. Goret - CEA Paris-Saclay
C. Hadjichristidis - Durham University
D. Hauser - Max Planck Institute for Nuclear Physics
M. Hauser - Heidelberg University
G. Heinzelmann - Universität Hamburg
G. Henri - Centre National de la Recherche Scientifique
G. Hermann - Max Planck Institute for Nuclear Physics
J.A. Hinton - Heidelberg University
W. Hofmann - Max Planck Institute for Nuclear Physics
M. Holleran - North-West University
Dieter Horns - University of Tübingen
A. Jacholkowska - Laboratoire de Physique Nucléaire et de Hautes Énergies
O.C. de Jager - North-West University
B. Khelifi - Centre National de la Recherche Scientifique
S. Klages
Nu. Komin - Humboldt-Universität zu Berlin
A. Konopelko - Humboldt-Universität zu Berlin
I.J. Latham - Durham University
R. Le Gallou - Durham University
A. Lemiere - Centre National de la Recherche Scientifique
M. Lemoine-Goumard - 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 - Institut National de Physique Nucléaire et de Physique des Particules
D. Nedbal - Charles University
S.J. Nolan - Durham University
A. Noutsos - Durham University
K.J. Orford - Durham University
J.L. Osborne - Durham University
M. Ouchrif - Laboratoire de Physique Nucléaire et de Hautes Énergies
M. Panter - Max Planck Institute for Nuclear Physics
G. Pelletier - Centre National de la Recherche Scientifique
S. Pita - Centre National de la Recherche Scientifique
G. Puhlhofer - Heidelberg University
M. Punch - Université Paris Cité
B.C. Raubenheimer - North-West University
M. Raue - Universität Hamburg
S.M. Rayner - Durham University
A. Reimer - Ruhr University Bochum
O. Reimer - Ruhr University Bochum
J. Ripken - Universität Hamburg
L. Rob - Charles University
L. Rolland - CEA Paris-Saclay
G. Rowell - Max Planck Institute for Nuclear Physics
V. Sahakian - A. Alikhanyan National Laboratory
L. Sauge - Centre National de la Recherche Scientifique
S. Schlenker - Humboldt-Universität zu Berlin
R. Schlickeiser - Ruhr University Bochum
C. Schuster
U. Schwanke - Humboldt-Universität zu Berlin
M. Siewert
H. Sol - Centre National de la Recherche Scientifique
D. Spangler - Durham University
R. Steenkamp - University of Namibia
C. Stegmann - Humboldt-Universität zu Berlin
G. Superina - École Polytechnique
J.-P. Tavernet - Laboratoire de Physique Nucléaire et de Hautes Énergies
R. Terrier - Centre National de la Recherche Scientifique
C.G. Theoret - Centre National de la Recherche Scientifique
M. Tluczykont - Laboratoire Leprince-Ringuet
C. van Eldik - Max Planck Institute for Nuclear Physics
G. Vasileiadis - Laboratoire de Physique Nucléaire et de Hautes Énergies
C. Venter
P. Vincent - Laboratoire de Physique Nucléaire et de Hautes Énergies
H.J. Volk
S.J. Wagner
M. Ward
Détails de publication: Astronomy & Astrophysics - A&A, Vol.448, pp.L43-L47
Identifiants: 99150499809311
Unité académique: Université de Montpellier
Langue: English
Type de ressource: Journal article
Champs locaux: in2p3-00025549