Journal articles
Deep view of the Large Magellanic Cloud with six years of Fermi-LAT observations
Markus Ackermann
1
A. Albert
William B. Atwood
2
Luca Baldini
Jean Ballet
3
Guido Barbiellini
D. Bastieri
R. Bellazzini
E. Bissaldi
E. D. Bloom
R. Bonino
T. J. Brandt
J. Bregeon
4
Pascal Bruel
5
R. Buehler
G. A. Caliandro
R. A. Cameron
M. Caragiulo
P. A. Caraveo
E. Cavazzuti
C. Cecchi
E. Charles
A. Chekhtman
J. Chiang
G. Chiaro
S. Ciprini
J. Cohen-Tanugi
4
S. Cutini
F. D’ammando
A. de Angelis
F. de Palma
R. Desiante
S. W. Digel
6
P. S. Drell
C. Favuzzi
E. C. Ferrara
W. B. Focke
A. Franckowiak
P. Fusco
7
F. Gargano
D. Gasparrini
N. Giglietto
F. Giordano
G. Godfrey
I. A. Grenier
3
M.-H. Grondin
8
Lucas Guillemot
9, 10
S. Guiriec
A. K. Harding
11
A. B. Hill
D. Horan
5
G. Jóhannesson
J. Knödlseder
M. Kuss
12
S. Larsson
13
L. Latronico
J. Li
14
L. Li
13
F. Longo
F. Loparco
4
P. Lubrano
S. Maldera
P. Martin
M. Mayer
M. N. Mazziotta
P. F. Michelson
15
T. Mizuno
M. E. Monzani
A. Morselli
S. Murgia
E. Nuss
4
T. Ohsugi
M. Orienti
E. Orlando
J. F. Ormes
D. Paneque
M. Pesce-Rollins
F. Piron
4
G. Pivato
T. A. Porter
S. Rainò
R. Rando
M. Razzano
A. Reimer
O. Reimer
R. W. Romani
M. Sánchez-Conde
A. Schulz
C. Sgrò
E. J. Siskind
D. A. Smith
8
F. Spada
G. Spandre
P. Spinelli
D. J. Suson
H. Takahashi
16
J. B. Thayer
L. Tibaldo
D. F. Torres
G. Tosti
E. Troja
G. Vianello
M. Wood
S. Zimmer
Jean Ballet 3
Author Employer institution : Département de Physique Nucléaire (ex SPhN)
Guido Barbiellini
Author
D. Bastieri
Author
R. Bellazzini
Author
J. Bregeon 4
Author IdHAL : johan-bregeon arXiv : https://arxiv.org/a/bregeon ORCID : https://orcid.org/0000-0002-6790-5328
Pascal Bruel 5
Author Employer institution : Centre National de la Recherche Scientifique
R. Buehler
Author
G. A. Caliandro
Author
G. Chiaro
Author
S. Ciprini
Author
J. Cohen-Tanugi 4
Author IdHAL : johann-cohen-tanugi arXiv : https://arxiv.org/a/johannct ORCID : https://orcid.org/0000-0001-9022-4232
S. Cutini
Author
I. A. Grenier 3
Author
M.-H. Grondin 8
Author
Lucas Guillemot 9, 10
Author Employer institution : Université d'Orléans
S. Guiriec
Author
J. Knödlseder
Author IdHAL : jurgen-knodlseder ORCID : https://orcid.org/0000-0002-0014-7809
M. Kuss 12
Author
S. Larsson 13
Author
L. Latronico
Author
M. Pesce-Rollins
Author
F. Piron 4
Author IdHAL : frederic-piron ORCID : https://orcid.org/0000-0001-6885-7156
G. Pivato
Author
T. A. Porter
Author
C. Sgrò
Author
E. J. Siskind
Author
D. A. Smith 8
Author IdHAL : david-austen-smith arXiv : https://arxiv.org/a/smith#4 ORCID : https://orcid.org/0000-0002-7833-0275
F. Spada
Author
1
DESY - Deutsches Elektronen-Synchrotron [Zeuthen] (Platanenallee 6 D-15738 Zeuthen - Germany)
- Helmholtz-Gemeinschaft = Helmholtz Association (Anna-Louisa-Karsch-Straße 2, 10178 Berlin - Germany)
2
SCIPP - Santa Cruz Institute for Particle Physics (Santa Cruz California - 95064 - United States)
- UCSC - University of California [Santa Cruz] (1156 High Street, Santa Cruz, Ca 95064 - United States)
- University of California (United States)
3
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)
4
LUPM - Laboratoire Univers et Particules de Montpellier (Université de Montpellier Place Eugène Bataillon - CC 72 34095 Montpellier Cédex 05 - 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)
- UM - Université de Montpellier (163 rue Auguste Broussonnet - 34090 Montpellier - France)
- CNRS - Centre National de la Recherche Scientifique : UMR5299 (France)
5
LLR - Laboratoire Leprince-Ringuet (Route de Saclay - 91128 Palaiseau Cedex - France)
- IN2P3 - Institut National de Physique Nucléaire et de Physique des Particules du CNRS (France)
- X - École polytechnique (École polytechnique, 91128 Palaiseau Cedex - France)
- CNRS - Centre National de la Recherche Scientifique : UMR7638 (France)
6
SLAC - Stanford Linear Accelerator Center (SLAC Stanford University 2575 Sand Hill Rd Menlo Park, CA 94039 - United States)
- Stanford University [Stanford] (450 Serra Mall, Stanford, CA 94305-2004 - United States)
7
INFN, sezione di Bari - Istituto Nazionale di Fisica Nucleare, sezione di Bari (Via Orabona, 4 70126 Bari - Italy)
8
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)
9
USN - Unité Scientifique de la Station de Nançay (18330 NANCAY - France)
- OSUC - Observatoire des Sciences de l'Univers en région Centre (Campus Géosciences, 1A rue de la Férollerie, 45071 Orléans - France)
- INSU - CNRS - Institut national des sciences de l'Univers (INSU-CNRS 3 rue Michel-Ange, 75794 Paris Cedex 16 - France)
- Observatoire de Paris (61 Av de l'Observatoire 75014 PARIS - France)
- PSL - Université Paris sciences et lettres (60 rue Mazarine 75006 Paris - France)
- UO - Université d'Orléans (Château de la Source - Avenue du Parc Floral - BP 6749 - 45067 Orléans cedex 2 - France)
- CNRS - Centre National de la Recherche Scientifique : UMS3116 (France)
- INSU - CNRS - Institut national des sciences de l'Univers : USR 704 (INSU-CNRS 3 rue Michel-Ange, 75794 Paris Cedex 16 - France)
- Observatoire de Paris : USR 704 (61 Av de l'Observatoire 75014 PARIS - France)
- PSL - Université Paris sciences et lettres (60 rue Mazarine 75006 Paris - France)
- UO - Université d'Orléans : USR 704 (Château de la Source - Avenue du Parc Floral - BP 6749 - 45067 Orléans cedex 2 - France)
- CNRS - Centre National de la Recherche Scientifique : USR 704 (France)
10
LPC2E - Laboratoire de Physique et Chimie de l'Environnement et de l'Espace (3A, Avenue de la Recherche Scientifique 45071 Orléans cedex 2 - France)
- OSUC - Observatoire des Sciences de l'Univers en région Centre : UMS3116 (Campus Géosciences, 1A rue de la Férollerie, 45071 Orléans - France)
- INSU - CNRS - Institut national des sciences de l'Univers (INSU-CNRS 3 rue Michel-Ange, 75794 Paris Cedex 16 - France)
- Observatoire de Paris (61 Av de l'Observatoire 75014 PARIS - France)
- PSL - Université Paris sciences et lettres (60 rue Mazarine 75006 Paris - France)
- UO - Université d'Orléans (Château de la Source - Avenue du Parc Floral - BP 6749 - 45067 Orléans cedex 2 - France)
- CNRS - Centre National de la Recherche Scientifique : UMS3116 (France)
- CNES - Centre National d’Études Spatiales [Paris] : UMR 7328 (Siège social : 2 place Maurice Quentin, 75039 Paris - France)
11
GFSC Astrophysics Science Division (United States)
- GSFC - NASA Goddard Space Flight Center (Greenbelt, MD 20771 - United States)
12
INFN - Istituto Nazionale di Fisica Nucleare [Pisa] (Edificio C Polo Fibonacci Largo B. Pontecorvo, 3 56127 Pisa - Italy)
13
KTH - Royal Institute of Technology [Stockholm] (SE-100 44, Stockholm, Sweden - Sweden)
14
IEEC-CSIC - Institut d'Estudis Espacials de Catalunya (C/Gran Capita, 2-4, desp 201,
08034 Barcelona - Spain)
15
HEPL - Hansen Experimental Physics Laboratory (452 Lomita Mall, Stanford University, Stanford, CA 94305-4085 - United States)
- Stanford University [Stanford] (450 Serra Mall, Stanford, CA 94305-2004 - United States)
16
Hiroshima University (Japan)
Abstract : The nearby Large Magellanic Cloud (LMC) provides a rare opportunity of a spatially resolved view of an external star-forming galaxy in gamma-rays. The LMC was detected at 0.1-100GeV as an extended source with CGRO/EGRET and using early observations with the Fermi-LAT. The emission was found to correlate with massive star-forming regions and to be particularly bright towards 30 Doradus. Studies of the origin and transport of cosmic rays (CRs) in the Milky Way are frequently hampered by line-of-sight confusion and poor distance determination. The LMC offers a complementary way to address these questions by revealing whether and how the gamma-ray emission is connected to specific objects, populations of objects, and structures in the galaxy. We revisited the gamma-ray emission from the LMC using about 73 months of Fermi-LAT P7REP data in the 0.2-100GeV range. We developed a complete spatial and spectral model of the LMC emission, for which we tested several approaches: a simple geometrical description, template-fitting, and a physically driven model for CR-induced interstellar emission. In addition to identifying PSR J0540-6919 through its pulsations, we find two hard sources positionally coincident with plerion N 157B and supernova remnant N 132D, which were also detected at TeV energies with H.E.S.S. We detect an additional soft source that is currently unidentified. Extended emission dominates the total flux from the LMC. It consists of an extended component of about the size of the galaxy and additional emission from 3 to 4 regions with degree-scale sizes. If it is interpreted as CRs interacting with interstellar gas, the large-scale emission implies a large-scale population of ~1-100GeV CRs with a density of ~30% of the local Galactic value. On top of that, the 3 to 4 small-scale emission regions would correspond to enhancements of the CR density by factors 2 to 6 or higher (Abridged).
Document type :
Journal articles
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https://hal-insu.archives-ouvertes.fr/insu-01360102
Contributor : Nathalie Rouchon <>
Submitted on : Wednesday, October 24, 2018 - 3:45:08 PM
Last modification on : Friday, December 18, 2020 - 12:54:07 PM
Contributor : Nathalie Rouchon <>
Submitted on : Wednesday, October 24, 2018 - 3:45:08 PM
Last modification on : Friday, December 18, 2020 - 12:54:07 PM
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Identifiers
- HAL Id : insu-01360102, version 1
- ARXIV : 1509.06903v2
- DOI : 10.1051/0004-6361/201526920
Collections
INSU | CNRS | MIPS | UNIV-MONTPELLIER | CMM | OSUC | X-DEP-PHYS | OBSPM | LUPM | X | UNIV-ORLEANS | X-LLR | USN | IN2P3 | LLR | CENBG | IRFU-AIM | CEA | DSM-IRFU | CEA-DRF | LPC2E | UNIV-PARIS7 | USPC | LUPM_EMA | UNIV-PARIS | UP-SCIENCES | PSL
Citation
Markus Ackermann, A. Albert, William B. Atwood, Luca Baldini, Jean Ballet, et al.. Deep view of the Large Magellanic Cloud with six years of Fermi-LAT observations. Astronomy and Astrophysics - A&A, EDP Sciences, 2016, 586, pp.A71. ⟨10.1051/0004-6361/201526920⟩. ⟨insu-01360102⟩
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