Search for gamma-ray emission from the Coma Cluster with six years of Fermi-LAT data

M. Ackermann; M. Ajello; A. Albert; W.B. Atwood; L. Baldini; J. Ballet; G. Barbiellini; D. Bastieri; K. Bechtol; R. Bellazzini; E. Bissaldi; R.D. Blandford; E.D. Bloom; R. Bonino; E. Bottacini; J. Bregeon; P. Bruel; R. Buehler; G.A. Caliandro; R.A. Cameron; M. Caragiulo; P.A. Caraveo; J.M. Casandjian; E. Cavazzuti; C. Cecchi; E. Charles; A. Chekhtman; G. Chiaro; S. Ciprini; Johann Cohen-Tanugi; J. Conrad; S. Cutini; F. d'Ammando; A.De Angelis; F.De Palma; R. Desiante; S.W. Digel; L.Di Venere; P.S. Drell; C. Favuzzi; S.J. Fegan; Y. Fukazawa; S. Funk; P. Fusco; F. Gargano; D. Gasparrini; N. Giglietto; F. Giordano; M. Giroletti; G. Godfrey; D. Green; I.A. Grenier; S. Guiriec; E. Hays; J.W. Hewitt; D. Horan; G. Jóhannesson; M. Kuss; S. Larsson; L. Latronico; J. Li; L. Li; F. Longo; F. Loparco; M.N. Lovellette; P. Lubrano; G.M. Madejski; S. Maldera; A. Manfreda; M. Mayer; M.N. Mazziotta; P.F. Michelson; W. Mitthumsiri; T. Mizuno; M.E. Monzani; A. Morselli; I.V. Moskalenko; S. Murgia; E. Nuss; T. Ohsugi; M. Orienti; E. Orlando; J.F. Ormes; D. Paneque; M. Pesce-Rollins; V. Petrosian; F. Piron; G. Pivato; T.A. Porter; S. Rainò; R. Rando; M. Razzano; A. Reimer; O. Reimer; M. Sánchez-Conde; C. Sgrò; E.J. Siskind; F. Spada; G. Spandre; P. Spinelli; H. Tajima; H. Takahashi; J.B. Thayer; L. Tibaldo; D.F. Torres; G. Tosti; E. Troja; G. Vianello; K.S. Wood; S. Zimmer; Y. Rephaeli

doi:10.3847/0004-637X/819/2/149

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Search for gamma-ray emission from the Coma Cluster with six years of Fermi-LAT data

Journal article

Peer reviewed

Search for gamma-ray emission from the Coma Cluster with six years of Fermi-LAT data

M. Ackermann, M. Ajello, A. Albert, W.B. Atwood, L. Baldini, J. Ballet, G. Barbiellini, D. Bastieri, K. Bechtol, R. Bellazzini, …

The Astrophysical Journal, Vol.819(2)

2016

DOI: https://doi.org/10.3847/0004-637X/819/2/149

Abstract

galaxies: clusters: individual

gamma rays: galaxies: clusters

gamma ray: emission

gamma ray: flux

gamma ray: VHE

particle: interaction

electron: secondary

cluster

spectral

GLAST

magnetic field

field strength

sensitivity

structure

benchmark

galaxy

halo

Compton scattering

We present results from γ-ray observations of the Coma cluster incorporating six years of Fermi-LAT data and the newly released “Pass 8” event-level analysis. Our analysis of the region reveals low-significance residual structures within the virial radius of the cluster that are too faint for a detailed investigation with the current data. Using a likelihood approach that is free of assumptions on the spectral shape we derive upper limits on the γ-ray flux that is expected from energetic particle interactions in the cluster. We also consider a benchmark spatial and spectral template motivated by models in which the observed radio halo is mostly emission by secondary electrons. In this case, the median expected and observed upper limits for the flux above 100 $\mathrm{MeV}$ are 1.7 × 10(−)(9) ph cm(−)(2) s(−)(1) and 5.2 × 10(−)(9) ph cm(−)(2) s(−)(1) respectively (the latter corresponds to residual emission at the level of 1.8σ). These bounds are comparable to or higher than predicted levels of hadronic gamma-ray emission in cosmic-ray (CR) models with or without reacceleration of secondary electrons, although direct comparisons are sensitive to assumptions regarding the origin and propagation mode of CRs and magnetic field properties. The minimal expected γ-ray flux from radio and star-forming galaxies within the Coma cluster is roughly an order of magnitude below the median sensitivity of our analysis.

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Title: Search for gamma-ray emission from the Coma Cluster with six years of Fermi-LAT data
Creators - without role: M. Ackermann - Deutsches Elektronen-Synchrotron DESY
M. Ajello - Clemson University
A. Albert - Kavli Institute for Particle Astrophysics and Cosmology
W.B. Atwood - University of California, Santa Cruz
L. Baldini - Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
J. Ballet - Université Paris Cité
G. Barbiellini - University of Trieste
D. Bastieri - University of Padua
K. Bechtol - University of Wisconsin–Madison
R. Bellazzini - Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
E. Bissaldi - Istituto Nazionale di Fisica Nucleare, Sezione di Bari
R.D. Blandford - Kavli Institute for Particle Astrophysics and Cosmology
E.D. Bloom - Kavli Institute for Particle Astrophysics and Cosmology
R. Bonino - University of Turin
E. Bottacini - Stanford University
J. Bregeon - Université de Montpellier, Laboratoire Univers et Particules de Montpellier - LUPM
P. Bruel - École Polytechnique
R. Buehler - Deutsches Elektronen-Synchrotron DESY
G.A. Caliandro - Consorzio Interuniversitario Fisica Spaziale
R.A. Cameron - Stanford University
M. Caragiulo - Istituto Nazionale di Fisica Nucleare, Sezione di Bari
P.A. Caraveo - Istituto di Astrofisica Spaziale e Fisica Cosmica di Milano
J.M. Casandjian - Université Paris Cité
E. Cavazzuti - Agenzia Spaziale Italiana
C. Cecchi - University of Perugia
E. Charles - Kavli Institute for Particle Astrophysics and Cosmology
A. Chekhtman - George Mason University
G. Chiaro - University of Padua
S. Ciprini - Istituto Nazionale di Fisica Nucleare, Sezione di Perugia
Johann Cohen-Tanugi - Université de Montpellier, Laboratoire Univers et Particules de Montpellier - LUPM
J. Conrad - Stockholm University
S. Cutini - Istituto Nazionale di Fisica Nucleare, Sezione di Perugia
F. d'Ammando
A.De Angelis
F.De Palma
R. Desiante - Istituto Nazionale di Fisica Nucleare, Sezione di Torino
S.W. Digel - Kavli Institute for Particle Astrophysics and Cosmology
L.Di Venere
P.S. Drell - Kavli Institute for Particle Astrophysics and Cosmology
C. Favuzzi - Polytechnic University of Bari
S.J. Fegan - Laboratoire Leprince-Ringuet
Y. Fukazawa - Hiroshima University
S. Funk - Universitätsklinikum Erlangen
P. Fusco - Polytechnic University of Bari
F. Gargano - Istituto Nazionale di Fisica Nucleare, Sezione di Bari
D. Gasparrini - Agenzia Spaziale Italiana
N. Giglietto - Istituto Nazionale di Fisica Nucleare, Sezione di Bari
F. Giordano - Polytechnic University of Bari
M. Giroletti - Istituto di Radioastronomia di Bologna
G. Godfrey - Kavli Institute for Particle Astrophysics and Cosmology
D. Green - University of Maryland, College Park
I.A. Grenier - CEA Paris-Saclay
S. Guiriec - Goddard Space Flight Center
E. Hays - Goddard Space Flight Center
J.W. Hewitt - University of North Florida
D. Horan - Laboratoire Leprince-Ringuet
G. Jóhannesson - University of Iceland
M. Kuss - Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
S. Larsson - KTH Royal Institute of Technology
L. Latronico - Istituto Nazionale di Fisica Nucleare, Sezione di Torino
J. Li - Institute of Space Sciences
L. Li - Fraunhofer Chalmers Research Centre for Industrial Mathematics
F. Longo - Istituto Nazionale di Fisica Nucleare, Sezione di Trieste
F. Loparco - Polytechnic University of Bari
M.N. Lovellette - United States Naval Research Laboratory
P. Lubrano - University of Perugia
G.M. Madejski - Kavli Institute for Particle Astrophysics and Cosmology
S. Maldera - Istituto Nazionale di Fisica Nucleare, Sezione di Torino
A. Manfreda - Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
M. Mayer - Deutsches Elektronen-Synchrotron DESY
M.N. Mazziotta - Istituto Nazionale di Fisica Nucleare, Sezione di Bari
P.F. Michelson - Kavli Institute for Particle Astrophysics and Cosmology
W. Mitthumsiri - Mahidol University
T. Mizuno - Hiroshima University
M.E. Monzani - Kavli Institute for Particle Astrophysics and Cosmology
A. Morselli - Istituto Nazionale di Fisica Nucleare, Roma Tor Vergata
I.V. Moskalenko - Stanford University
S. Murgia - University of California, Irvine
E. Nuss - Université de Montpellier, Laboratoire Univers et Particules de Montpellier - LUPM
T. Ohsugi - Hiroshima University
M. Orienti - Istituto di Radioastronomia di Bologna
E. Orlando - Kavli Institute for Particle Astrophysics and Cosmology
J.F. Ormes - University of Denver
D. Paneque - Max Planck Institute for Physics
M. Pesce-Rollins - Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
V. Petrosian - Stanford University
F. Piron - Université de Montpellier, Laboratoire Univers et Particules de Montpellier - LUPM
G. Pivato - Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
T.A. Porter - Kavli Institute for Particle Astrophysics and Cosmology
S. Rainò - Polytechnic University of Bari
R. Rando - University of Padua
M. Razzano - Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
A. Reimer - Universität Innsbruck
O. Reimer - Universität Innsbruck
M. Sánchez-Conde - AlbaNova
C. Sgrò - Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
E.J. Siskind - Real Time Tomography
F. Spada - Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
G. Spandre - Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
P. Spinelli - Polytechnic University of Bari
H. Tajima - Nagoya University
H. Takahashi - Hiroshima University
J.B. Thayer - Stanford University
L. Tibaldo - Max Planck Institute for Nuclear Physics
D.F. Torres - Institució Catalana de Recerca i Estudis Avançats
G. Tosti - University of Perugia
E. Troja - University of Maryland, College Park
G. Vianello - Kavli Institute for Particle Astrophysics and Cosmology
K.S. Wood - United States Naval Research Laboratory
S. Zimmer - AlbaNova
Y. Rephaeli - University of California, San Diego
Publication Details: The Astrophysical Journal, Vol.819(2)
Identifiers: 9941732009311
Academic Unit: Laboratoire Univers et Particules de Montpellier - LUPM
Language: English
Resource Type: Journal article
Local Fields: hal-01823268