GeV GAMMA-RAY FLUX UPPER LIMITS FROM CLUSTERS OF GALAXIES

Ackermann M, Ajello M, Allafort A, Baldini L, Ballet J, Barbiellini G, Bastieri D, Bechtol K, Bellazzini R, Blandford RD, Blasi P, Bloom ED, Bonamente E, Borgland AW, Bouvier A, Brandt TJ, Bregeon J, Brigida M, Bruel P, Buehler R, Buson S, Caliandro GA, Cameron RA, Caraveo PA, Carrigan S, Casandjian JM, Cavazzuti E, Cecchi C, Celik O, Charles E, Chekhtman A, Cheung CC, Chiang J, Ciprini S, Claus R, Cohen-Tanugi J, Colafrancesco S, Cominsky LR, Conrad J, Dermer CD, De Palma F, Silva EDCE, Drell PS, Dubois R, Dumora D, Edmonds Y, Farnier C, Favuzzi C, Frailis M, Fukazawa Y, Funk S, Fusco P, Gargano F, Gasparrini D, Gehrels N, Germani S, Giglietto N, Giordano F, Giroletti M, Glanzman T, Godfrey G, Grenier IA, Grondin MH, Guiriec S, Hadasch D, Harding AK, Hayashida M, Hays E, Horan D, Hughes RE, Jeltema TE, Johannesson G, Johnson AS, Johnson TJ, Johnson WN, Kamae T, Katagiri H, Kataoka J, Kerr M, Knoedlseder J, Kuss MW, Lande J, Latronico L, Lee SH, Lemoine-Goumard M, Longo F, Loparco F, Lott B, Lovellette MN, Lubrano P, Madejski GM, Makeev A, Mazziotta MN, Michelson PF, Mitthumsiri W, Mizuno T, Moiseev AA, Monte C, Monzani ME, Morselli A, Moskalenko IV, Murgia S, Naumann-Godo M, Nolan PL, Norris JP, Nuss E, Ohsugi T, Omodei N, Orlando E, Ormes JF, Ozaki M, Paneque D, Panetta JH, Pepe M, Pesce-Rollins M, Petrosian V, Pfrommer C, Piron F, Porter TA, Profumo S, Raino S, Rando R, Razzano M, Reimer A, Reimer O, Reposeur T, Ripken J, Ritz S, Rodriguez AY, Romani RW, Roth M, Sadrozinski HFW, Sander A, Parkinson PMS, Scargle JD, Sgro C, Siskind EJ, Smith PD, Spandre G, Spinelli P, Starck JL, Stawarz L, Strickman MS, Strong AW, Suson DJ, Tajima H, Takahashi HH, Takahashi T, Tanaka T, Thayer JB, Thayer JG, Tibaldo L, Tibolla O, Torres DF, Tosti G, Tramacere A, Uchiyama Y, Usher TL, Vandenbroucke J, Vasileiou V, Vilchez N, Vitale V, Waite AP, Wang P, Winer BL, Wood KS, Yang Z, Ylinen T, Ziegler M (2010)

Publication Type: Journal article

Publication year: 2010

Journal

Book Volume: 717

Pages Range: L71-L78

Journal Issue: 1

DOI: 10.1088/2041-8205/717/1/L71

Abstract

The detection of diffuse radio emission associated with clusters of galaxies indicates populations of relativistic leptons infusing the intracluster medium (ICM). Those electrons and positrons are either injected into and accelerated directly in the ICM, or produced as secondary pairs by cosmic-ray ions scattering on ambient protons. Radiation mechanisms involving the energetic leptons together with the decay of neutral pions produced by hadronic interactions have the potential to produce abundant GeV photons. Here, we report on the search for GeV emission from clusters of galaxies using data collected by the Large Area Telescope on the Fermi Gamma-ray Space Telescope from 2008 August to 2010 February. Thirty-three galaxy clusters have been selected according to their proximity and high mass, X-ray flux and temperature, and indications of non-thermal activity for this study. We report upper limits on the photon flux in the range 0.2-100 GeV toward a sample of observed clusters (typical values (1-5) x 10(-9) photon cm(-2) s(-1)) considering both point-like and spatially resolved models for the high-energy emission and discuss how these results constrain the characteristics of energetic leptons and hadrons, and magnetic fields in the ICM. The volume-averaged relativistic-hadron-to-thermal energy density ratio is found to be <5%-10% in several clusters.

Authors with CRIS profile

Involved external institutions

Stanford University United States (USA) (US) National Institute for Nuclear Physics / Istituto Nazionale di Fisica Nucleare (INFN) Italy (IT) University of Paris 7 - Denis Diderot / Université Paris VII Denis Diderot France (FR) National Institute for Astrophysics / Istituto Nazionale Astrofisica (INAF) Italy (IT) National Center for Scientific Research / Centre national de la recherche scientifique (CNRS) France (FR) Politecnico di Bari Italy (IT) École Polytechnique - Université Paris-Saclay France (FR) Spanish National Research Council / Consejo Superior de Investigaciones Científicas (CSIC) Spain (ES) University of Padua / Universita degli Studi di Padova Italy (IT) Italian Space Agency / Agenzia Spaziale Italiana (ASI) Italy (IT) National Aeronautics and Space Administration (NASA) United States (USA) (US) U.S. Naval Research Laboratory United States (USA) (US) Università degli Studi di Perugia Italy (IT) University of Montpellier / Université Montpellier France (FR) Sonoma State University United States (USA) (US) Stockholm University / Stockholms universitet Sweden (SE) Institut national de physique nucléaire et de physique des particules (IN2P3) France (FR) University of Udine / Università degli Studi di Udine Italy (IT) Hiroshima University Japan (JP) University of Alabama in Huntsville (UAH) United States (USA) (US) Institució Catalana de Recerca i Estudis Avançats (ICREA) / Catalan Institution for Research and Advanced Studies Spain (ES) Ohio State University United States (USA) (US) University of California Santa Cruz United States (USA) (US) Waseda University / 早稲田大学 Japan (JP) University of Washington United States (USA) (US) Japan Aerospace eXploration Agency (JAXA) Japan (JP) University of Denver United States (USA) (US) Max-Planck-Institut für extraterrestrische Physik (MPE) / Max Planck Institute for Extraterrestrial Physics Germany (DE) University of Toronto Canada (CA) NYCB Real-Time Computing, Inc. United States (USA) (US) Purdue University Northwest / Purdue University Calumet United States (USA) (US) Julius-Maximilians-Universität Würzburg Germany (DE) Institut d'Estudis Espacials de Catalunya (IEEC) Spain (ES) AlbaNova University Centre / Kungliga Tekniska Högskolan AlbaNova Universitetscentrum Sweden (SE)

How to cite

APA:

Ackermann, M., Ajello, M., Allafort, A., Baldini, L., Ballet, J., Barbiellini, G.,... Ziegler, M. (2010). GeV GAMMA-RAY FLUX UPPER LIMITS FROM CLUSTERS OF GALAXIES. Astrophysical Journal Letters, 717(1), L71-L78. https://dx.doi.org/10.1088/2041-8205/717/1/L71

MLA:

Ackermann, Markus, et al. "GeV GAMMA-RAY FLUX UPPER LIMITS FROM CLUSTERS OF GALAXIES." Astrophysical Journal Letters 717.1 (2010): L71-L78.

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