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Authors: M. Ajello
L. Baldini
G. Barbiellini
D. Bastieri
R. Bellazzini
E. Bissaldi
E. D. Bloom
R. Bonino
E. Bottacini
T. J. Brandt
J. Bregeon
P. Bruel
R. Buehler
G. A. Caliandro
R. A. Cameron
M. Caragiulo
E. Cavazzuti
E. Charles
A. Chekhtman
S. Ciprini
J. Cohen-Tanugi
B. Condon
F. Costanza
S. Cutini
F. D'Ammando
F. De Palma
R. Desiante
N. Di Lalla
M. Di Mauro
L. Di Venere
P. S. Drell
G. Dubner
D. Dumora
L. Duvidovich
C. Favuzzi
W. B. Focke
P. Fusco
F. Gargano
D. Gasparrini
E. Giacani
N. Giglietto
T. Glanzman
D. A. Green
I. A. Grenier
S. Guiriec
E. Hays
J. W. Hewitt
A. B. Hill
D. Horan
T. Jogler
G. Jóhannesson
I. Jung-Richardt
S. Kensei
M. Kuss
S. Larsson
L. Latronico
M. Lemoine-Goumard
J. Li
L. Li
F. Longo
F. Loparco
M. N. Lovellette
P. Lubrano
J. Magill
S. Maldera
A. Manfreda
M. Mayer
M. N. Mazziotta
J. E. McEnery
P. F. Michelson
W. Mitthumsiri
T. Mizuno
M. E. Monzani
A. Morselli
I. V. Moskalenko
M. Negro
Clemson University
Università di Pisa
Kavli Institute for Particle Astrophysics and Cosmology
Istituto Nazionale di Fisica Nucleare, Roma
Universita degli Studi di Trieste
Istituto Nazionale Di Fisica Nucleare, Sezione di Padova
Università degli Studi di Padova
Istituto Nazionale Di Fisica Nucleare, Sezione di Pisa
Università degli Studi di Torino
NASA Goddard Space Flight Center
Laboratoire Univers et Particules de Montpellier
Laboratoire Leprince-Ringuet
Deutsche Elektronen-Synchrotron
Consorzio Interuniversitario per la Fisica Spaziale (CIFS)
Università degli Studi di Bari
Agenzia Spaziale Italiana
George Mason University, Fairfax Campus
Centre d'Etudes Nucleaires de Bordeaux Gradignan
Osservatorio Astronomico di Roma
Istituto Di Radioastronomia, Bologna
Alma Mater Studiorum Università di Bologna
Università degli Studi di Napoli Federico II
Universita degli Studi di Udine
Instituto de Astronomia y Fisica del Espacio
University of Cambridge
Universite Paris 7- Denis Diderot
University of North Florida
University of Southampton
University Science Institute Reykjavik
Friedrich-Alexander-Universität Erlangen-Nürnberg
Hiroshima University
The Royal Institute of Technology (KTH)
Oskar Klein Centre for Cosmoparticle Physics
Universitat Autònoma de Barcelona
Naval Research Laboratory
University of Maryland
Mahidol University
University of Denver
Max Planck Institut fur Physik (Werner-Heisenberg-Institut)
University and Research (MIUR)
Medizinische Universitat Innsbruck
NYCB Realtime Computing Inc.
Keywords: Earth and Planetary Sciences
Issue Date: 10-Mar-2016
Citation: Astrophysical Journal. Vol.819, No.2 (2016)
Abstract: © 2016. The American Astronomical Society. All rights reserved. RCW 86 is a young supernova remnant (SNR) showing a shell-type structure at several wavelengths and is thought to be an efficient cosmic-ray (CR) accelerator. Earlier Fermi Large Area Telescope results reported the detection of γ-ray emission coincident with the position of RCW 86 but its origin (leptonic or hadronic) remained unclear due to the poor statistics. Thanks to 6.5 years of data acquired by the Fermi-LAT and the new event reconstruction Pass 8, we report the significant detection of spatially extended emission coming from RCW 86. The spectrum is described by a power-law function with a very hard photon index in the 0.1-500 GeV range and an energy flux above 100 MeV of erg cm-2 s-1. Gathering all the available multiwavelength (MWL) data, we perform a broadband modeling of the nonthermal emission of RCW 86 to constrain parameters of the nearby medium and bring new hints about the origin of the γ-ray emission. For the whole SNR, the modeling favors a leptonic scenario in the framework of a two-zone model with an average magnetic field of 10.2 ±0.7 μG and a limit on the maximum energy injected into protons of 2 ×1049 erg for a density of 1 cm-3. In addition, parameter values are derived for the north-east and south-west (SW) regions of RCW 86, providing the first indication of a higher magnetic field in the SW region.
ISSN: 15384357
Appears in Collections:Scopus 2016-2017

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