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Journal articles
A population of gamma-ray emitting globular clusters seen with the Fermi Large Area Telescope
A.A. Abdo
Markus Ackermann
Marco Ajello
Luca Baldini
Jean Ballet
1
Guido Barbiellini
D. Bastieri
R. Bellazzini
R. D. Blandford
E. D. Bloom
E. Bonamente
A. W. Borgland
A. Bouvier
T. J. Brandt
J. Bregeon
M. Brigida
Pascal Bruel
2
R. Buehler
S. Buson
G. A. Caliandro
R. A. Cameron
P. A. Caraveo
S. Carrigan
J. M. Casandjian
1
E. Charles
S. Chaty
1
A. Chekhtman
C. C. Cheung
J. Chiang
S. Ciprini
R. Claus
J. Cohen-Tanugi
3
J. Conrad
M. E. Decesar
C. D. Dermer
F. de Palma
S. W. Digel
E. Do Couto E Silva
P. S. Drell
R. Dubois
D. Dumora
4
C. Favuzzi
P. Fortin
2
M. Frailis
Y. Fukazawa
P. Fusco
F. Gargano
D. Gasparrini
N. Gehrels
S. Germani
N. Giglietto
F. Giordano
T. Glanzman
G. Godfrey
I. Grenier
1
M.-H. Grondin
4
J. E. Grove
L. Guillemot
4
S. Guiriec
D. Hadasch
A. K. Harding
E. Hays
P. Jean
G. Jóhannesson
T. J. Johnson
W. N. Johnson
T. Kamae
H. Katagiri
J. Kataoka
M. Kerr
J. Knödlseder
5
M. Kuss
J. Lande
L. Latronico
S.-H. Lee
M. Lemoine-Goumard
4
M. Llena Garde
F. Longo
F. Loparco
M. N. Lovellette
P. Lubrano
A. Makeev
M. N. Mazziotta
P. F. Michelson
W. Mitthumsiri
T. Mizuno
C. Monte
M. E. Monzani
A. Morselli
I. V. Moskalenko
S. Murgia
M. Naumann-Godo
P. L. Nolan
J. P. Norris
E. Nuss
3
T. Ohsugi
N. Omodei
E. Orlando
J. F. Ormes
B. Pancrazi
5
D. Parent
4
M. Pepe
M. Pesce-Rollins
F. Piron
3
T.A. Porter
S. Rainò
R. Rando
A. Reimer
O. Reimer
T. Reposeur
4
J. Ripken
R. W. Romani
M. Roth
H. F.-W. Sadrozinski
P. M. Saz Parkinson
C. Sgrò
E. J. Siskind
David Stanley Smith
4
P. Spinelli
M. S. Strickman
D. J. Suson
H. Takahashi
T. Takahashi
T. Tanaka
J. B. Thayer
J. G. Thayer
L. Tibaldo
1
D. F. Torres
G. Tosti
A. Tramacere
Y. Uchiyama
T. L. Usher
V. Vasileiou
C. Venter
N. Vilchez
V. Vitale
A. P. Waite
P. Wang
N. Webb
B. L. Winer
Z. Yang
T. Ylinen
M. Ziegler
5
Jean Ballet 1
Author Employer institution : Département de Physique Nucléaire (ex SPhN)
Guido Barbiellini
Author
D. Bastieri
Author
R. Bellazzini
Author
Pascal Bruel 2
Author Employer institution : Centre National de la Recherche Scientifique
R. Buehler
Author
S. Buson
Author
G. A. Caliandro
Author
J. Chiang
Author
S. Ciprini
Author
R. Claus
Author
J. Cohen-Tanugi 3
Author IdHAL : johann-cohen-tanugi arXiv : https://arxiv.org/a/johannct
J. Kataoka
Author
M. Kerr
Author
J. Knödlseder 5
Author IdHAL : jurgen-knodlseder ORCID : https://orcid.org/0000-0002-0014-7809
M. Kuss
Author
D. Parent 4
Author
M. Pepe
Author
M. Pesce-Rollins
Author
F. Piron 3
Author IdHAL : frederic-piron ORCID : https://orcid.org/0000-0001-6885-7156
1
AIM (UMR_7158 / UMR_E_9005 / UM_112) - Astrophysique Interprétation Modélisation (AIM - UMR 7158 - UMR E 9005,
ex "Astrophysique Interactions Multi-échelles",
Service d'astrophysique,
CEA/Saclay,
Orme des Merisiers
F-91191 GIF SUR YVETTE CEDEX - France)
- CNRS - Centre National de la Recherche Scientifique : UMR_7158 (France)
- INSU - CNRS - Institut national des sciences de l'Univers (INSU-CNRS 3 rue Michel-Ange, 75794 Paris Cedex 16 - France)
- CEA - Commissariat à l'énergie atomique et aux énergies alternatives : UMR_E_9005 (Centre de Saclay Centre de Grenoble Centre de Cadarache etc - France)
- UPD7 - Université Paris Diderot - Paris 7 : UMR_7158 (5 rue Thomas-Mann - 75205 Paris cedex 13 - France)
2
LLR - Laboratoire Leprince-Ringuet (Route de Saclay - 91128 Palaiseau Cedex - France)
- CNRS - Centre National de la Recherche Scientifique : UMR7638 (France)
- X - École polytechnique (École polytechnique, 91128 Palaiseau Cedex - France)
- IN2P3 - Institut National de Physique Nucléaire et de Physique des Particules du CNRS (France)
3
LPTA - Laboratoire de Physique Théorique et Astroparticules (Bât 13- 1er Et. - CC 070 Place Eugène Bataillon 34095 MONTPELLIER CEDEX 5 - France)
- UM2 - Université Montpellier 2 - Sciences et Techniques (Place Eugène Bataillon - 34095 Montpellier cedex 5 - France)
- IN2P3 - Institut National de Physique Nucléaire et de Physique des Particules du CNRS (France)
- CNRS - Centre National de la Recherche Scientifique : UMR5207 (France)
4
CENBG - Centre d'Etudes Nucléaires de Bordeaux Gradignan (Chemin du Solarium - BP 120 - 33175 Gradignan Cedex - France)
- Université Sciences et Technologies - Bordeaux 1 (351 cours de la Libération - 33405 Talence cedex - France)
- IN2P3 - Institut National de Physique Nucléaire et de Physique des Particules du CNRS (France)
- CNRS - Centre National de la Recherche Scientifique : UMR5797 (France)
5
CESR - Centre d'étude spatiale des rayonnements (9 Av du colonel Roche - BP 4346 31028 TOULOUSE CEDEX 4 - France)
- UT3 - Université Toulouse III - Paul Sabatier (118 route de Narbonne - 31062 Toulouse - France)
- Université Fédérale Toulouse Midi-Pyrénées (41 Allée Jules Guesde, 31000 Toulouse - France)
- INSU - CNRS - Institut national des sciences de l'Univers (INSU-CNRS 3 rue Michel-Ange, 75794 Paris Cedex 16 - France)
- CNRS - Centre National de la Recherche Scientifique : UMR5187 (France)
- OMP - Observatoire Midi-Pyrénées (14 avenue Edouard Belin, 31400 TOULOUSE - France)
- Université Fédérale Toulouse Midi-Pyrénées (41 Allée Jules Guesde, 31000 Toulouse - France)
Abstract : Globular clusters with their large populations of millisecond pulsars (MSPs) are believed to be potential emitters of high-energy gamma-ray emission. Our goal is to constrain the millisecond pulsar populations in globular clusters from analysis of gamma-ray observations. We use 546 days of continuous sky-survey observations obtained with the Large Area Telescope aboard the Fermi Gamma-ray Space Telescope to study the gamma-ray emission towards 13 globular clusters. Steady point-like high-energy gamma-ray emission has been significantly detected towards 8 globular clusters. Five of them (47 Tucanae, Omega Cen, NGC 6388, Terzan 5, and M 28) show hard spectral power indices $(0.7 < \Gamma <1.4)$ and clear evidence for an exponential cut-off in the range 1.0-2.6 GeV, which is the characteristic signature of magnetospheric emission from MSPs. Three of them (M 62, NGC 6440 and NGC 6652) also show hard spectral indices $(1.0 < \Gamma < 1.7)$, however the presence of an exponential cut-off can not be unambiguously established. Three of them (Omega Cen, NGC 6388, NGC 6652) have no known radio or X-ray MSPs yet still exhibit MSP spectral properties. From the observed gamma-ray luminosities, we estimate the total number of MSPs that is expected to be present in these globular clusters. We show that our estimates of the MSP population correlate with the stellar encounter rate and we estimate 2600-4700 MSPs in Galactic globular clusters, commensurate with previous estimates. The observation of high-energy gamma-ray emission from a globular cluster thus provides a reliable independent method to assess their millisecond pulsar populations that can be used to make constraints on the original neutron star X-ray binary population, essential for understanding the importance of binary systems in slowing the inevitable core collapse of globular clusters.
Document type :
Journal articles
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http://hal.in2p3.fr/in2p3-00585161
Contributor : Virginie Mas <>
Submitted on : Monday, April 11, 2011 - 11:14:14 PM
Last modification on : Friday, April 10, 2020 - 4:56:57 PM
Contributor : Virginie Mas <>
Submitted on : Monday, April 11, 2011 - 11:14:14 PM
Last modification on : Friday, April 10, 2020 - 4:56:57 PM
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Identifiers
- HAL Id : in2p3-00585161, version 1
- DOI : 10.1051/0004-6361/201014458
- ARXIV : 1003.3588
Collections
IN2P3 | CEA | INSU | CENBG | LPTA | LLR | CNRS | X-LLR | X | OMP | OMP-IRAP | IRFU-AIM | DSM-IRFU | CEA-DRF | X-DEP-PHYS | UNIV-PARIS7 | USPC | UNIV-TLSE3 | UP-SCIENCES
Citation
A.A. Abdo, Markus Ackermann, Marco Ajello, Luca Baldini, Jean Ballet, et al.. A population of gamma-ray emitting globular clusters seen with the Fermi Large Area Telescope. Astronomy and Astrophysics - A&A, EDP Sciences, 2010, 524, pp.A75. ⟨10.1051/0004-6361/201014458⟩. ⟨in2p3-00585161⟩
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