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Search for gamma-ray emission from the Coma Cluster with six years of Fermi-LAT data
- Ackermann, M. (author)
- Ajello, M. (author)
- Albert, A. (author)
- show more...
- Atwood, W. B. (author)
- Baldini, L. (author)
- Ballet, J. (author)
- Barbiellini, G. (author)
- Bastieri, D. (author)
- Bechtol, K. (author)
- Bellazzini, R. (author)
- Bissaldi, E. (author)
- Blandford, R. D. (author)
- Bloom, E. D. (author)
- Bonino, R. (author)
- Bottacini, E. (author)
- Bregeon, J. (author)
- Bruel, P. (author)
- Buehler, R. (author)
- Caliandro, G. A. (author)
- Cameron, R. A. (author)
- Caragiulo, M. (author)
- Caraveo, P. A. (author)
- Casandjian, J. M. (author)
- Cavazzuti, E. (author)
- Cecchi, C. (author)
- Charles, E. (author)
- Chekhtman, A. (author)
- Chiaro, G. (author)
- Ciprini, S. (author)
- Cohen-Tanugi, J. (author)
- Conrad, J. (author)
- Cutini, S. (author)
- D’Ammando, F. (author)
- Angelis, A. (author)
- de Palma, F. (author)
- de Desiante, R. (author)
- Digel, S. W. (author)
- Venere, L. (author)
- Di Drell, P. S. (author)
- Favuzzi, C. (author)
- Fegan, S. J. (author)
- Fukazawa, Y. (author)
- Funk, S. (author)
- Fusco, P. (author)
- Gargano, F. (author)
- Gasparrini, D. (author)
- Giglietto, N. (author)
- Giordano, F. (author)
- Giroletti, M. (author)
- Godfrey, G. (author)
- Green, D. (author)
- Grenier, I. A. (author)
- Guiriec, S. (author)
- Hays, E. (author)
- Hewitt, J. W. (author)
- Horan, D. (author)
- Jóhannesson, G. (author)
- Kuss, M. (author)
- Li, J. (author)
- Li, L. (author)
- Longo, F. (author)
- Loparco, F. (author)
- Lovellette, M. N. (author)
- Lubrano, P. (author)
- Madejski, G. M. (author)
- Maldera, S. (author)
- Manfreda, A. (author)
- Mayer, M. (author)
- Mazziotta, M. N. (author)
- Michelson, P. F. (author)
- Mitthumsiri, W. (author)
- Mizuno, T. (author)
- Monzani, M. E. (author)
- Morselli, A. (author)
- Moskalenko, I. V. (author)
- Murgia, S. (author)
- Nuss, E. (author)
- Ohsugi, T. (author)
- Orienti, M. (author)
- Orlando, E. (author)
- Ormes, J. F. (author)
- Paneque, D. (author)
- Pesce-Rollins, M. (author)
- Petrosian, V. (author)
- Piron, F. (author)
- Pivato, G. (author)
- Porter, T. A. (author)
- Rainó, S. (author)
- Rando, R. (author)
- Razzano, M. (author)
- Reimer, A. (author)
- Reimer, O. (author)
- Sgró, C. (author)
- Siskind, E. J. (author)
- Spada, F. (author)
- Spandre, G. (author)
- Spinelli, P. (author)
- Tajima, H. (author)
- Takahashi, H. (author)
- Thayer, J. B. (author)
- Tibaldo, L. (author)
- Torres, D. F. (author)
- Tosti, G. (author)
- Troja, E. (author)
- Vianello, G. (author)
- Wood, K. S. (author)
- Rephaeli, Y. (author)
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- (creator_code:org_t)
- Institute of Physics (IOP), 2016
- 2016
- English.
- In: Astrophysical Journal. - : Institute of Physics (IOP). - 0004-637X .- 1538-4357. ; 819:2
- Journal article (peer-reviewed)
Abstract
Subject headings
Close
- We present results from gamma-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 gamma-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 100MeV are 1.7 x 10(-9) ph cm(-2) s(-1) and 5.2 x 10(-9) ph cm(-2) s(-1) respectively (the latter corresponds to residual emission at the level of 1.8 sigma). 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.-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.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Keyword
- galaxies: clusters: individual (Coma)
- gamma rays: galaxies: clusters
- Physics
- fysik
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
- Ackermann, M.
- Ajello, M.
- Albert, A.
- Atwood, W. B.
- Baldini, L.
- Ballet, J.
- show more...
- Barbiellini, G.
- Bastieri, D.
- Bechtol, K.
- Bellazzini, R.
- Bissaldi, E.
- Blandford, R. D.
- Bloom, E. D.
- Bonino, R.
- Bottacini, E.
- Bregeon, J.
- Bruel, P.
- Buehler, R.
- Caliandro, G. A.
- Cameron, R. A.
- Caragiulo, M.
- Caraveo, P. A.
- Casandjian, J. M ...
- Cavazzuti, E.
- Cecchi, C.
- Charles, E.
- Chekhtman, A.
- Chiaro, G.
- Ciprini, S.
- Cohen-Tanugi, J.
- Conrad, J.
- Cutini, S.
- D’Ammando, F.
- Angelis, A.
- de Palma, F.
- de Desiante, R.
- Digel, S. W.
- Venere, L.
- Di Drell, P. S.
- Favuzzi, C.
- Fegan, S. J.
- Fukazawa, Y.
- Funk, S.
- Fusco, P.
- Gargano, F.
- Gasparrini, D.
- Giglietto, N.
- Giordano, F.
- Giroletti, M.
- Godfrey, G.
- Green, D.
- Grenier, I. A.
- Guiriec, S.
- Hays, E.
- Hewitt, J. W.
- Horan, D.
- Jóhannesson, G.
- Kuss, M.
- Larsson, Stefan
- Li, L.
- Li, J.
- Longo, F.
- Loparco, F.
- Lovellette, M. N ...
- Lubrano, P.
- Madejski, G. M.
- Maldera, S.
- Manfreda, A.
- Mayer, M.
- Mazziotta, M. N.
- Michelson, P. F.
- Mitthumsiri, W.
- Mizuno, T.
- Monzani, M. E.
- Morselli, A.
- Moskalenko, I. V ...
- Murgia, S.
- Nuss, E.
- Ohsugi, T.
- Orienti, M.
- Orlando, E.
- Ormes, J. F.
- Paneque, D.
- Pesce-Rollins, M ...
- Petrosian, V.
- Piron, F.
- Pivato, G.
- Porter, T. A.
- Rainó, S.
- Rando, R.
- Razzano, M.
- Reimer, A.
- Reimer, O.
- Sánchez-Conde, M ...
- Sgró, C.
- Siskind, E. J.
- Spada, F.
- Spandre, G.
- Spinelli, P.
- Tajima, H.
- Takahashi, H.
- Thayer, J. B.
- Tibaldo, L.
- Torres, D. F.
- Tosti, G.
- Troja, E.
- Vianello, G.
- Wood, K. S.
- Zimmer, Stephan
- Rephaeli, Y.
- show less...
- About the subject
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- NATURAL SCIENCES
- NATURAL SCIENCES
- and Physical Science ...
- and Astronomy Astrop ...
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- NATURAL SCIENCES
- NATURAL SCIENCES
- and Physical Science ...
- Articles in the publication
- Astrophysical Jo ...
- By the university
- Stockholm University
- Royal Institute of Technology
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