Search for very-high-energy γ-ray emission from Galactic globular clusters with H.E.S.S.

A. Abramowski; Fabio Acero; F. Aharonian; A. G. Akhperjanian; G. Anton; S. Balenderan; Agnès Balzer; A. Barnacka; Y. Becherini; J. Becker Tjus; K. Bernlöhr; E. Birsin; J. Biteau; A. Bochow; C. Boisson; J. Bolmont; P. Bordas; J. Brucker; F. Brun; P. Brun; T. Bulik; S. Carrigan; S. Casanova; M. Cerruti; P. M. Chadwick; R. C. G. Chaves; A. Cheesebrough; S. Colafrancesco; G. Cologna; J. Conrad; C. Couturier; M. Dalton; M. K. Daniel; I. D. Davids; B. Degrange; C. Deil; P. Dewilt; H. J. Dickinson; A. Djannati-Ataï; W. Domainko; L. O’c. Drury; G. Dubus; K. Dutson; J. Dyks; M. Dyrda; K. Egberts; P. Eger; P. Espigat; L. Fallon; C. Farnier; S. Fegan; F. Feinstein; M. V. Fernandes; D. Fernandez; A. Fiasson; G. Fontaine; A. Förster; M. Füssling; M. Gajdus; Y. A. Gallant; T. Garrigoux; H. Gast; B. Giebels; J. F. Glicenstein; B. Glück; D. Göring; M.-H. Grondin; M. Grudzińska; S. Häffner; J. D. Hague; J. Hahn; D. Hampf; J. Harris; S. Heinz; G. Heinzelmann; G. Henri; G. Hermann; A. Hillert; J. A. Hinton; W. Hofmann; P. Hofverberg; M. Holler; D. Horns; A. Jacholkowska; C. Jahn; M. Jamrozy; I. Jung; M. A. Kastendieck; K. Katarzyński; U. Katz; S. Kaufmann; B. Khélifi; S. Klepser; D. Klochkov; W. Kluźniak; T. Kneiske; D. Kolitzus; Nu. Komin; K. Kosack; R. Kossakowski; F. Krayzel; P. P. Krüger; H. Laffon; G. Lamanna; J. Lefaucheur; M. Lemoine-Goumard; J.-P. Lenain; D. Lennarz; T. Lohse; A. Lopatin; C.-C. Lu; V. Marandon; A. Marcowith; Julien Masbou; G. Maurin; N. Maxted; M. Mayer; T. J. L. Mccomb; M. C. Medina; J. Méhault; U. Menzler; R. Moderski; M. Mohamed; Emmanuel Moulin; C. L. Naumann; M. Naumann-Godo; M. de Naurois; D. Nedbal; N. Nguyen; J. Niemiec; S. J. Nolan; S. Ohm; E. de Oña Wilhelmi; B. Opitz; M. Ostrowski; I. Oya; M. Panter; R. D. Parsons; M. Paz Arribas; N. W. Pekeur; G. Pelletier; J. Perez; P.-O. Petrucci; B. Peyaud; S. Pita; G. Pühlhofer; M. Punch; A. Quirrenbach; S. Raab; M. Raue; A. Reimer; O. Reimer; M. Renaud; R. de Los Reyes; F. Rieger; J. Ripken; L. Rob; S. Rosier-Lees; G. Rowell; B. Rudak; C. B. Rulten; V. Sahakian; D. A. Sanchez; A. Santangelo; R. Schlickeiser; A. Schulz; U. Schwanke; S. Schwarzburg; S. Schwemmer; F. Sheidaei; J. L. Skilton; H. Sol; G. Spengler; Ł. Stawarz; R. Steenkamp; C. Stegmann; F. Stinzing; K. Stycz; I. Sushch; A. Szostek; J.-P. Tavernet; R. Terrier; M. Tluczykont; C. Trichard; K. Valerius; C. van Eldik; G. Vasileiadis; C. Venter; A. Viana; P. Vincent; H. J. Völk; F. Volpe; S. Vorobiov; M. Vorster; S. J. Wagner; M. Ward; R. White; A. Wierzcholska; D. Wouters; M. Zacharias; A. Zajczyk; A. A. Zdziarski; A. Zech; H.-S. Zechlin

doi:10.1051/0004-6361/201220719

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Search for very-high-energy γ-ray emission from Galactic globular clusters with H.E.S.S.

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Search for very-high-energy γ-ray emission from Galactic globular clusters with H.E.S.S.

A. Abramowski, Fabio Acero, F. Aharonian, A. G. Akhperjanian, G. Anton, S. Balenderan, Agnès Balzer, A. Barnacka, Y. Becherini, J. Becker Tjus, …

Astronomy & Astrophysics - A&A, Vol.551

2013

DOI: https://doi.org/10.1051/0004-6361/201220719

Résumé

globular clusters: general

radiation mechanisms: non-thermal

gamma rays: general

pulsars: general

Context. Globular clusters (GCs) are established emitters of high-energy (HE, 100 MeV < E < 100 GeV) γ-ray radiation which could originate from the cumulative emission of the numerous millisecond pulsars (msPSRs) in the clusters’ cores or from inverse Compton (IC) scattering of relativistic leptons accelerated in the GC environment. These stellar clusters could also constitute a new class of sources in the very-high-energy (VHE, E > 100 GeV) γ-ray regime, judging from the recent detection of a signal from the direction of Terzan 5 with the H.E.S.S. telescope array.Aims. To search for VHE γ-ray sources associated with other GCs, and to put constraints on leptonic emission models, we systematically analyzed the observations towards 15 GCs taken with the H.E.S.S. array of imaging atmospheric Cherenkov telescopes.Methods. We searched for point-like and extended VHE γ-ray emission from each GC in our sample and also performed a stacking analysis combining the data from all GCs to investigate the hypothesis of a population of faint emitters. Assuming IC emission as the origin of the VHE γ-ray signal from the direction of Terzan 5, we calculated the expected γ-ray flux from each of the 15 GCs, based on their number of millisecond pulsars, their optical brightness and the energy density of background photon fields.Results. We did not detect significant VHE γ-ray emission from any of the 15 GCs in either of the two analyses. Given the uncertainties related to the parameter determinations, the obtained flux upper limits allow to rule out the simple IC/msPSR scaling model for NGC 6388 and NGC 7078. The upper limits derived from the stacking analyses are factors between 2 and 50 below the flux predicted by the simple leptonic scaling model, depending on the assumed source extent and the dominant target photon fields. Therefore, Terzan 5 still remains exceptional among all GCs, as the VHE γ-ray emission either arises from extra-ordinarily efficient leptonic processes, or from a recent catastrophic event, or is even unrelated to the GC itself.

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Titre: Search for very-high-energy γ-ray emission from Galactic globular clusters with H.E.S.S.
Créateurs - sans rôle: A. Abramowski - Universität Hamburg
Fabio Acero - Université de Montpellier, Laboratoire Univers et Particules de Montpellier - LUPM
F. Aharonian - Max Planck Institute for Nuclear Physics
A. G. Akhperjanian - National Academy of Sciences of Armenia
G. Anton - Friedrich-Alexander-Universität Erlangen-Nürnberg
S. Balenderan - Durham University
Agnès Balzer - University of Potsdam
A. Barnacka - CEA Paris-Saclay
Y. Becherini - Centre National de la Recherche Scientifique
J. Becker Tjus
K. Bernlöhr - Max Planck Institute for Nuclear Physics
E. Birsin - Humboldt-Universität zu Berlin
J. Biteau - École Polytechnique
A. Bochow - Max Planck Institute for Nuclear Physics
C. Boisson - Université Paris Cité
J. Bolmont - Sorbonne Université
P. Bordas - University of Tübingen
J. Brucker - Friedrich-Alexander-Universität Erlangen-Nürnberg
F. Brun - Centre National de la Recherche Scientifique
P. Brun - Institut de Recherche sur les Lois Fondamentales de l'Univers
T. Bulik - University of Warsaw
S. Carrigan - Max Planck Institute for Nuclear Physics
S. Casanova - Max Planck Institute for Nuclear Physics
M. Cerruti - Université Paris Cité
P. M. Chadwick - Durham University
R. C. G. Chaves - CEA Paris-Saclay
A. Cheesebrough - Durham University
S. Colafrancesco - University of the Witwatersrand
G. Cologna - Heidelberg University
J. Conrad - Stockholm University
C. Couturier - Laboratoire de Physique Nucléaire et de Hautes Énergies
M. Dalton - Laboratoire de Physique des deux infinis Bordeaux
M. K. Daniel - Durham University
I. D. Davids - University of Namibia
B. Degrange - École Polytechnique
C. Deil - Max Planck Institute for Nuclear Physics
P. Dewilt - The University of Adelaide
H. J. Dickinson - Stockholm University
A. Djannati-Ataï - AstroParticule et Cosmologie
W. Domainko - Max Planck Institute for Nuclear Physics
L. O’c. Drury - Dublin Institute For Advanced Studies
G. Dubus - Université Grenoble Alpes
K. Dutson - University of Leicester
J. Dyks - Nicolaus Copernicus Astronomical Center
M. Dyrda - Institute of Nuclear Physics, Polish Academy of Sciences
K. Egberts - Universität Innsbruck
P. Eger - Friedrich-Alexander-Universität Erlangen-Nürnberg
P. Espigat - Université Paris Cité
L. Fallon - Dublin Institute For Advanced Studies
C. Farnier - Stockholm University
S. Fegan - Laboratoire Leprince-Ringuet
F. Feinstein - Université de Montpellier, Laboratoire Univers et Particules de Montpellier - LUPM
M. V. Fernandes - Universität Hamburg
D. Fernandez - Université de Montpellier, Laboratoire Univers et Particules de Montpellier - LUPM
A. Fiasson - Laboratoire d’Annecy de Physique des Particules
G. Fontaine - Laboratoire Leprince-Ringuet
A. Förster - Max Planck Institute for Nuclear Physics
M. Füssling
M. Gajdus - Humboldt-Universität zu Berlin
Y. A. Gallant - Université de Montpellier, Laboratoire Univers et Particules de Montpellier - LUPM
T. Garrigoux - Sorbonne Université
H. Gast - Max Planck Institute for Nuclear Physics
B. Giebels - Laboratoire Leprince-Ringuet
J. F. Glicenstein - Commissariat à l'Énergie Atomique et aux Énergies Alternatives
B. Glück - Friedrich-Alexander-Universität Erlangen-Nürnberg
D. Göring - Friedrich-Alexander-Universität Erlangen-Nürnberg
M.-H. Grondin - Max Planck Institute for Nuclear Physics
M. Grudzińska - University of Warsaw
S. Häffner - Friedrich-Alexander-Universität Erlangen-Nürnberg
J. D. Hague - Max Planck Institute for Nuclear Physics
J. Hahn - Max Planck Institute for Nuclear Physics
D. Hampf - Universität Hamburg
J. Harris - Durham University
S. Heinz - Friedrich-Alexander-Universität Erlangen-Nürnberg
G. Heinzelmann - Universität Hamburg
G. Henri - Centre National de la Recherche Scientifique
G. Hermann - Max Planck Institute for Nuclear Physics
A. Hillert - Max Planck Institute for Nuclear Physics
J. A. Hinton - University of Leicester
W. Hofmann - Max Planck Institute for Nuclear Physics
P. Hofverberg - Max Planck Institute for Nuclear Physics
M. Holler - University of Potsdam
D. Horns - Universität Hamburg
A. Jacholkowska - Laboratoire de Physique Nucléaire et de Hautes Énergies
C. Jahn - Friedrich-Alexander-Universität Erlangen-Nürnberg
M. Jamrozy - Jagiellonian University
I. Jung - Friedrich-Alexander-Universität Erlangen-Nürnberg
M. A. Kastendieck - Universität Hamburg
K. Katarzyński - Nicolaus Copernicus University
U. Katz - Friedrich-Alexander-Universität Erlangen-Nürnberg
S. Kaufmann - Heidelberg University
B. Khélifi - Laboratoire Leprince-Ringuet
S. Klepser
D. Klochkov - University of Tübingen
W. Kluźniak - Nicolaus Copernicus Astronomical Center
T. Kneiske - Universität Hamburg
D. Kolitzus - Universität Innsbruck
Nu. Komin - Laboratoire d’Annecy de Physique des Particules
K. Kosack - Commissariat à l'Énergie Atomique et aux Énergies Alternatives
R. Kossakowski - Laboratoire d’Annecy de Physique des Particules
F. Krayzel - Laboratoire d’Annecy de Physique des Particules
P. P. Krüger
H. Laffon - Laboratoire Leprince-Ringuet
G. Lamanna - Laboratoire d’Annecy de Physique des Particules
J. Lefaucheur - AstroParticule et Cosmologie
M. Lemoine-Goumard - Laboratoire de Physique des deux infinis Bordeaux
J.-P. Lenain - AstroParticule et Cosmologie
D. Lennarz
T. Lohse
A. Lopatin
C.-C. Lu
V. Marandon
A. Marcowith - Université de Montpellier, Laboratoire Univers et Particules de Montpellier - LUPM
Julien Masbou - Laboratoire d’Annecy de Physique des Particules
G. Maurin - Laboratoire d’Annecy de Physique des Particules
N. Maxted
M. Mayer
T. J. L. Mccomb
M. C. Medina
J. Méhault - Université de Montpellier, Laboratoire Univers et Particules de Montpellier - LUPM
U. Menzler
R. Moderski
M. Mohamed
Emmanuel Moulin
C. L. Naumann - Laboratoire de Physique Nucléaire et de Hautes Énergies
M. Naumann-Godo
M. de Naurois - Laboratoire Leprince-Ringuet
D. Nedbal
N. Nguyen
J. Niemiec
S. J. Nolan
S. Ohm
E. de Oña Wilhelmi
B. Opitz
M. Ostrowski
I. Oya
M. Panter
R. D. Parsons
M. Paz Arribas
N. W. Pekeur
G. Pelletier
J. Perez
P.-O. Petrucci
B. Peyaud
S. Pita - AstroParticule et Cosmologie
G. Pühlhofer
M. Punch - AstroParticule et Cosmologie
A. Quirrenbach
S. Raab
M. Raue
A. Reimer
O. Reimer
M. Renaud - Université de Montpellier, Laboratoire Univers et Particules de Montpellier - LUPM
R. de Los Reyes
F. Rieger
J. Ripken
L. Rob
S. Rosier-Lees - Laboratoire d’Annecy de Physique des Particules
G. Rowell
B. Rudak
C. B. Rulten
V. Sahakian
D. A. Sanchez
A. Santangelo
R. Schlickeiser
A. Schulz
U. Schwanke
S. Schwarzburg
S. Schwemmer
F. Sheidaei - AstroParticule et Cosmologie
J. L. Skilton
H. Sol - Laboratoire Univers et Théories
G. Spengler
Ł. Stawarz
R. Steenkamp
C. Stegmann
F. Stinzing
K. Stycz
I. Sushch
A. Szostek
J.-P. Tavernet - Laboratoire de Physique Nucléaire et de Hautes Énergies
R. Terrier - AstroParticule et Cosmologie
M. Tluczykont
C. Trichard - Laboratoire d’Annecy de Physique des Particules
K. Valerius
C. van Eldik
G. Vasileiadis - Université de Montpellier, Laboratoire Univers et Particules de Montpellier - LUPM
C. Venter
A. Viana
P. Vincent - Laboratoire de Physique Nucléaire et de Hautes Énergies
H. J. Völk
F. Volpe
S. Vorobiov - Université de Montpellier, Laboratoire Univers et Particules de Montpellier - LUPM
M. Vorster
S. J. Wagner
M. Ward
R. White
A. Wierzcholska
D. Wouters
M. Zacharias
A. Zajczyk - Université de Montpellier, Laboratoire Univers et Particules de Montpellier - LUPM
A. A. Zdziarski
A. Zech - Laboratoire Univers et Théories
H.-S. Zechlin
Détails de publication: Astronomy & Astrophysics - A&A, Vol.551
Identifiants: 99152969609311
Unité académique: Laboratoire Univers et Particules de Montpellier - LUPM
Langue: English
Type de ressource: Journal article
Champs locaux: hal-01094457