Search for cosmic-ray-induced gamma-ray emission in galaxy clusters

Ackermann, M.; Buehler, R.; Ajello, M.; Albert, A.; Allafort, A.; Bechtol, K.; Bloom, E. D.; Bottacini, E.; Atwood, W. B.; Baldini, L.; Ballet, J.; Barbiellini, G.; Bastieri, D.; Buson, S.; Bellazzini, R.; Bregeon, J.; Bonamente, E.; Brandt, T. J.; Brigida, M.; others, and

doi:10.1088/0004-637X/787/1/18

Title: Search for cosmic-ray-induced gamma-ray emission in galaxy clusters

Journal Article · Tue May 20 00:00:00 EDT 2014 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/787/1/18· OSTI ID:22356869

Ackermann, M.; Buehler, R. ^[1]; Ajello, M. ^[2]; Albert, A. ^[3]; Allafort, A.; Bechtol, K.; Bloom, E. D.; Bottacini, E. ^[4]; Atwood, W. B. ^[5]; Baldini, L. ^[6]; Ballet, J. ^[7]; Barbiellini, G. ^[8]; Bastieri, D.; Buson, S. ^[9]; Bellazzini, R.; Bregeon, J. ^[10]; Bonamente, E. ^[11]; Brandt, T. J. ^[12]; Brigida, M. ^[13]; others, and

Deutsches Elektronen Synchrotron DESY, D-15738 Zeuthen (Germany)
Space Sciences Laboratory, 7 Gauss Way, University of California, Berkeley, CA 94720-7450 (United States)
Department of Physics, Center for Cosmology and Astro-Particle Physics, The Ohio State University, Columbus, OH 43210 (United States)
W. W. Hansen Experimental Physics Laboratory, Kavli Institute for Particle Astrophysics and Cosmology, Department of Physics and SLAC National Accelerator Laboratory, Stanford University, Stanford, CA 94305 (United States)
Santa Cruz Institute for Particle Physics, Department of Physics and Department of Astronomy and Astrophysics, University of California at Santa Cruz, Santa Cruz, CA 95064 (United States)
Università di Pisa and Istituto Nazionale di Fisica Nucleare, Sezione di Pisa I-56127 Pisa (Italy)
Laboratoire AIM, CEA-IRFU/CNRS/Université Paris Diderot, Service d'Astrophysique, CEA Saclay, F-91191 Gif sur Yvette (France)
Istituto Nazionale di Fisica Nucleare, Sezione di Trieste, I-34127 Trieste (Italy)
Istituto Nazionale di Fisica Nucleare, Sezione di Padova, I-35131 Padova (Italy)
Istituto Nazionale di Fisica Nucleare, Sezione di Pisa, I-56127 Pisa (Italy)
Istituto Nazionale di Fisica Nucleare, Sezione di Perugia, I-06123 Perugia (Italy)
NASA Goddard Space Flight Center, Greenbelt, MD 20771 (United States)
Dipartimento di Fisica "M. Merlin" dell'Università e del Politecnico di Bari, I-70126 Bari (Italy)

Current theories predict relativistic hadronic particle populations in clusters of galaxies in addition to the already observed relativistic leptons. In these scenarios hadronic interactions give rise to neutral pions which decay into γ rays that are potentially observable with the Large Area Telescope (LAT) on board the Fermi space telescope. We present a joint likelihood analysis searching for spatially extended γ-ray emission at the locations of 50 galaxy clusters in four years of Fermi-LAT data under the assumption of the universal cosmic-ray (CR) model proposed by Pinzke and Pfrommer. We find an excess at a significance of 2.7σ, which upon closer inspection, however, is correlated to individual excess emission toward three galaxy clusters: A400, A1367, and A3112. We discuss these cases in detail and conservatively attribute the emission to unmodeled background systems (for example, radio galaxies within the clusters).Through the combined analysis of 50 clusters, we exclude hadronic injection efficiencies in simple hadronic models above 21% and establish limits on the CR to thermal pressure ratio within the virial radius, R {sub 200}, to be below 1.25%-1.4% depending on the morphological classification. In addition, we derive new limits on the γ-ray flux from individual clusters in our sample.

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OSTI ID:: 22356869

Journal Information:: Astrophysical Journal, Vol. 787, Issue 1; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 0004-637X

Country of Publication:: United States

Language:: English

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Using Radio Halos and Minihalos to Measure the Distributions of Magnetic Fields and Cosmic-Rays in Galaxy Clusters Keshet, Uri; Loeb, Abraham arXiv https://doi.org/10.48550/arxiv.1003.1133	text	January 2010
Detection of very high energy gamma-ray emission from the Perseus cluster head-tail galaxy IC 310 by the MAGIC telescopes Collaboration, Magic; Aleksić, J.; Antonelli, L. A. arXiv https://doi.org/10.48550/arxiv.1009.2155	text	January 2010
Constraints on Decaying Dark Matter from Fermi Observations of Nearby Galaxies and Clusters Dugger, Leanna; Jeltema, Tesla E.; Profumo, Stefano arXiv https://doi.org/10.48550/arxiv.1009.5988	text	January 2010
Re-acceleration of Nonthermal Particles at Weak Cosmological Shock Waves Kang, Hyesung; Ryu, Dongsu arXiv https://doi.org/10.48550/arxiv.1102.2561	text	January 2011
Probing Dark Matter Decay and Annihilation with Fermi LAT Observations of Nearby Galaxy Clusters Huang, Xiaoyuan; Vertongen, Gilles; Weniger, Christoph arXiv https://doi.org/10.48550/arxiv.1110.1529	text	January 2011
Fermi-LAT Observations of the Diffuse Gamma-Ray Emission: Implications for Cosmic Rays and the Interstellar Medium Collaboration, Lat arXiv https://doi.org/10.48550/arxiv.1202.4039	text	January 2012
Clusters of galaxies : observational properties of the diffuse radio emission Feretti, Luigina; Giovannini, Gabriele; Govoni, Federica arXiv https://doi.org/10.48550/arxiv.1205.1919	text	January 2012
Constraints on Cosmic Rays, Magnetic Fields, and Dark Matter from Gamma-Ray Observations of the Coma Cluster of Galaxies with VERITAS and Fermi Arlen, T.; Aune, T.; Beilicke, M. arXiv https://doi.org/10.48550/arxiv.1208.0676	text	January 2012
Dark Matter Constraints from Observations of 25 Milky Way Satellite Galaxies with the Fermi Large Area Telescope Collaboration, Lat; Ackermann, M.; Albert, A. arXiv https://doi.org/10.48550/arxiv.1310.0828	text	January 2013
Particle reacceleration in Coma cluster: radio properties and hard X-ray emission Brunetti, G.; Setti, G.; Feretti, L. arXiv https://doi.org/10.48550/arxiv.astro-ph/0008518	text	January 2000
Cosmic Ray Electrons in Groups and Clusters of Galaxies: Primary and Secondary Populations from a Numerical Cosmological Simulation Miniati, Francesco; Jones, T. W.; Kang, Hyesung arXiv https://doi.org/10.48550/arxiv.astro-ph/0108305	text	January 2001
The Mass Function of an X-Ray Flux-Limited Sample of Galaxy Clusters Reiprich, Thomas H.; Boehringer, Hans arXiv https://doi.org/10.48550/arxiv.astro-ph/0111285	text	January 2001
Numerical Modeling of Gamma Radiation from Galaxy Clusters Miniati, Francesco arXiv https://doi.org/10.48550/arxiv.astro-ph/0303593	text	January 2003
Cosmological Shock Waves and Their Role in the Large Scale Structure of the Universe Ryu, Dongsu; Kang, Hyesung; Hallman, Eric arXiv https://doi.org/10.48550/arxiv.astro-ph/0305164	text	January 2003
Probing the Cosmic Ray Population of the Giant Elliptical Galaxy M 87 with Observed TeV Gamma-Rays Pfrommer, Christoph; Ensslin, Torsten A. arXiv https://doi.org/10.48550/arxiv.astro-ph/0306258	text	January 2003
TeV Gamma-Ray Observations of the Perseus and Abell 2029 Galaxy Clusters Perkins, J. S.; Badran, H. M.; Blaylock, G. arXiv https://doi.org/10.48550/arxiv.astro-ph/0602258	text	January 2006
X-ray Detection of the Proto Supermassive Binary Black Hole at the Centre of Abell 400 Hudson, Daniel S.; Reiprich, Thomas H.; Clarke, Tracy E. arXiv https://doi.org/10.48550/arxiv.astro-ph/0603272	text	January 2006
Statistics of X-ray observables for the cooling-core and non-cooling core galaxy clusters Chen, Y.; Reiprich, T. H.; Böhringer, H. arXiv https://doi.org/10.48550/arxiv.astro-ph/0702482	text	January 2007
The Observed Concentration-Mass Relation for Galaxy Clusters Comerford, Julia M.; Natarajan, Priyamvada arXiv https://doi.org/10.48550/arxiv.astro-ph/0703126	text	January 2007
Compressible Turbulence in Galaxy Clusters: Physics and Stochastic Particle Re-acceleration Brunetti, G.; Lazarian, A. arXiv https://doi.org/10.48550/arxiv.astro-ph/0703591	text	January 2007
Cosmic Ray Protons and Magnetic Fields in Clusters of Galaxies and their Cosmological Consequences Ensslin, T. A.; Biermann, P. L.; Kronberg, P. P. arXiv https://doi.org/10.48550/arxiv.astro-ph/9609190	text	January 1996

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Relativistic protons in the Coma galaxy cluster: first gamma-ray constraints ever on turbulent reacceleration Brunetti, G.; Zimmer, S.; Zandanel, F. Monthly Notices of the Royal Astronomical Society, Vol. 472, Issue 2 https://doi.org/10.1093/mnras/stx2092	journal	August 2017
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