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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
physics and astronomy
Searches for dark matter annihilation signatures in the Segue 1 satellite galaxy with the MAGIC-I telescope
Journal of Cosmology and Astroparticle Physics, Volume 2011, No. 6, Article 035, Year 2011
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Description
We report the results of the observation of the nearby satellite galaxy Segue 1 performed by the MAGIC-I ground-based gamma-ray telescope between November 2008 and March 2009 for a total of 43.2 hours. No significant gamma-ray emission was found above the background. Differential upper limits on the gamma-ray flux are derived assuming various power-law slopes for the possible emission spectrum. Integral upper limits are also calculated for several power-law spectra and for different energy thresholds. The values are of the order of 10-11 ph cm-2 s-1 above 100 GeV and 10-12 ph cm-2 s-1 above 200 GeV. Segue 1 is currently considered one of the most interesting targets for indirect dark matter searches. In these terms, the upper limits have been also interpreted in the context of annihilating dark matter particles. For such purpose, we performed a grid scan over a reasonable portion of the parameter space for the minimal SuperGravity model and computed the flux upper limit for each point separately, taking fully into account the peculiar spectral features of each model. We found that in order to match the experimental upper limits with the model predictions, a minimum flux boost of 103 is required, and that the upper limits are quite dependent on the shape of the gamma-ray energy spectrum predicted by each specific model. Finally we compared the upper limits with the predictions of some dark matter models able to explain the PAMELA rise in the positron ratio, finding that Segue 1 data are in tension with the dark matter explanation of the PAMELA spectrum in the case of a dark matter candidate annihilating into τ+τ-. A complete exclusion however is not possible due to the uncertainties in the Segue 1 astrophysical factor. © 2011 IOP Publishing Ltd and SISSA.
Authors & Co-Authors
Aleksíc, Jelena
Spain, Cerdanyola Del Valles
Institut de Física D'altes Energies, Bellaterra
Antonelli, Lucio Angelo
Italy, Rome
Istituto Nazionale Di Astrofisica, Rome
Antoranz, Pedro
Italy, Pisa
Istituto Nazionale Di Fisica Nucleare, Sezione Di Pisa
Backes, Michael
Germany, Dortmund
Technische Universität Dortmund
Barrio, Juan Abel
Spain, Madrid
Universidad Complutense de Madrid
Bastieri, D.
Italy, Rome
Istituto Nazionale Di Fisica Nucleare - Infn
Becerra González, Josefa
Spain, San Cristobal de la Laguna
Instituto Astrofisico de Canarias
Spain, San Cristobal de la Laguna
Universidad de la Laguna
Bednarek, Włodzimierz
Poland, Lodz
University of Lodz
Berdyugin, Andrei V.
Finland, Turku
Turun Yliopisto
Berger, Karsten
Spain, San Cristobal de la Laguna
Instituto Astrofisico de Canarias
Spain, San Cristobal de la Laguna
Universidad de la Laguna
Bernardini, Elisa
Germany, Hamburg
Deutsches Elektronen-synchrotron Desy
Biland, Adrian
Switzerland, Zurich
Eth Zürich
Blanch, Oscar
Spain, Cerdanyola Del Valles
Institut de Física D'altes Energies, Bellaterra
Bock, Rudolf K.
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
Bonnoli, Giacomo
Italy, Rome
Istituto Nazionale Di Astrofisica, Rome
Braun, Isabel
Switzerland, Zurich
Eth Zürich
Bretz, Thomas
Germany, Wurzburg
Julius-maximilians-universität Würzburg
Switzerland, Lausanne
École Polytechnique Fédérale de Lausanne
Carosi, Alessandro
Italy, Rome
Istituto Nazionale Di Astrofisica, Rome
Colin, Pierre
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
Colombo, E.
Spain, San Cristobal de la Laguna
Instituto Astrofisico de Canarias
Contreras, José Luis
Spain, Madrid
Universidad Complutense de Madrid
Cortina, J.
Spain, Cerdanyola Del Valles
Institut de Física D'altes Energies, Bellaterra
Covino, Stefano
Italy, Rome
Istituto Nazionale Di Astrofisica, Rome
Dazzi, Francesco
Italy, Rome
Istituto Nazionale Di Fisica Nucleare - Infn
Italy, Padua
Istituto Nazionale Di Fisica Nucleare, Sezione Di Padova
De Angelis, Alessandro D.
Italy, Rome
Istituto Nazionale Di Fisica Nucleare - Infn
De Lotto, Barbara
Italy, Rome
Istituto Nazionale Di Fisica Nucleare - Infn
Doert, Marlene
Germany, Dortmund
Technische Universität Dortmund
Domínguez, A. D.
Spain, Madrid
Consejo Superior de Investigaciones Científicas
Dominis-Prester, Dijana
Croatia, Split
University of Split
Dorner, Daniela
Switzerland, Zurich
Eth Zürich
Doro, Michele
Spain, Cerdanyola Del Valles
Universitat Autònoma de Barcelona
Elsässer, Dominik
Germany, Wurzburg
Julius-maximilians-universität Würzburg
Ferenc, Daniela
Croatia, Split
University of Split
Fonseca, M. V.
Spain, Madrid
Universidad Complutense de Madrid
Font, Ll L.
Spain, Cerdanyola Del Valles
Universitat Autònoma de Barcelona
Fruck, Christian
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
García López, Ramón J.
Spain, San Cristobal de la Laguna
Instituto Astrofisico de Canarias
Spain, San Cristobal de la Laguna
Universidad de la Laguna
Garczarczyk, Markus
Spain, San Cristobal de la Laguna
Instituto Astrofisico de Canarias
Giavitto, Gianluca
Spain, Cerdanyola Del Valles
Institut de Física D'altes Energies, Bellaterra
Godinović, Nikola
Croatia, Split
University of Split
Hadasch, Daniela
Spain, Barcelona
Csic - Instituto de Ciencias Del Espacio Ice
Herrero Davó, Artemio Alonso
Spain, San Cristobal de la Laguna
Instituto Astrofisico de Canarias
Spain, San Cristobal de la Laguna
Universidad de la Laguna
Hildebrand, Dorothée
Switzerland, Zurich
Eth Zürich
Hose, Juergen
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
Hrupec, Dario
Croatia, Split
University of Split
Jogler, Tobias
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
Klepser, Stefan
Spain, Cerdanyola Del Valles
Institut de Física D'altes Energies, Bellaterra
La Barbera, Antonino
Italy, Rome
Istituto Nazionale Di Astrofisica, Rome
Lelas, Damir
Croatia, Split
University of Split
Lindfors, Elina J.
Finland, Turku
Turun Yliopisto
Lombardi, Saverio
Italy, Rome
Istituto Nazionale Di Fisica Nucleare - Infn
López-Moya, Marcos
Spain, Madrid
Universidad Complutense de Madrid
Lorenz, Eckhart
Switzerland, Zurich
Eth Zürich
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
Makariev, M. V.
Bulgaria, Sofia
Institute for Nuclear Research and Nuclear Energy Bulgarian Academy of Sciences
Maneva, Galina M.
Bulgaria, Sofia
Institute for Nuclear Research and Nuclear Energy Bulgarian Academy of Sciences
Mankuzhiyil, Nijil
Italy, Rome
Istituto Nazionale Di Fisica Nucleare - Infn
Mannheim, Karl
Germany, Wurzburg
Julius-maximilians-universität Würzburg
Maraschi, Laura
Italy, Rome
Istituto Nazionale Di Astrofisica, Rome
Mariotti, M.
Italy, Rome
Istituto Nazionale Di Fisica Nucleare - Infn
Martínez, Manel
Spain, Cerdanyola Del Valles
Institut de Física D'altes Energies, Bellaterra
Mazin, Daniel
Spain, Cerdanyola Del Valles
Institut de Física D'altes Energies, Bellaterra
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
Meucci, Mario
Italy, Pisa
Istituto Nazionale Di Fisica Nucleare, Sezione Di Pisa
Mirzoyan, Razmik G.
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
Miyamoto, Hiroko
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
Moldón, Javier
Spain, Barcelona
Instituto de Estudios Espaciales de Cataluña
Moralejo, Abelardo
Spain, Cerdanyola Del Valles
Institut de Física D'altes Energies, Bellaterra
Nieto, Daniel
Spain, Madrid
Universidad Complutense de Madrid
Nilsson, Kari
Finland, Turku
Turun Yliopisto
Oya, Igor
Spain, Madrid
Universidad Complutense de Madrid
Paiano, Simona
Italy, Rome
Istituto Nazionale Di Fisica Nucleare - Infn
Paneque, David
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
Paoletti, Riccardo
Italy, Pisa
Istituto Nazionale Di Fisica Nucleare, Sezione Di Pisa
Paredes, Josep Maria
Spain, Barcelona
Instituto de Estudios Espaciales de Cataluña
Pasanen, Mikko
Finland, Turku
Turun Yliopisto
Pauss, Felicitas
Switzerland, Zurich
Eth Zürich
Pérez-Torres, M. A.
Spain, Cerdanyola Del Valles
Institut de Física D'altes Energies, Bellaterra
Persic, Massimo
Italy, Rome
Istituto Nazionale Di Fisica Nucleare - Infn
Italy, Rome
Istituto Nazionale Di Astrofisica, Rome
Peruzzo, Luigi
Italy, Rome
Istituto Nazionale Di Fisica Nucleare - Infn
Pilia, Maura
Italy, Varese
Università Degli Studi Dell'insubria
Prada, Francisco
Spain, Madrid
Consejo Superior de Investigaciones Científicas
Prada Moroni, Pier Giorgio
Italy, Rome
Istituto Nazionale Di Fisica Nucleare - Infn
Prandini, Elisa
Italy, Rome
Istituto Nazionale Di Fisica Nucleare - Infn
Puljak, Ivica
Croatia, Split
University of Split
Reinthal, Riho
Finland, Turku
Turun Yliopisto
Rhode, Wolfgang
Germany, Dortmund
Technische Universität Dortmund
Ribó, Marc
Spain, Barcelona
Instituto de Estudios Espaciales de Cataluña
Rico, Javier R.
Spain, Cerdanyola Del Valles
Institut de Física D'altes Energies, Bellaterra
Spain, Barcelona
Institució Catalana de Recerca I Estudis Avançats
Saggion, Antonio
Italy, Rome
Istituto Nazionale Di Fisica Nucleare - Infn
Scalzotto, Villi
Italy, Rome
Istituto Nazionale Di Fisica Nucleare - Infn
Schweizer, Thomas
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
Shayduk, Maxim
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
Shore, Steven N.
Italy, Rome
Istituto Nazionale Di Fisica Nucleare - Infn
Sillanp̈äa, Aimo K.
Finland, Turku
Turun Yliopisto
Sitarek, Julian
Poland, Lodz
University of Lodz
Sobczyńska, Dorota
Poland, Lodz
University of Lodz
Spanier, Felix
Germany, Wurzburg
Julius-maximilians-universität Würzburg
Spiro, Susanna
Italy, Rome
Istituto Nazionale Di Astrofisica, Rome
Stamerra, Antonio
Italy, Pisa
Istituto Nazionale Di Fisica Nucleare, Sezione Di Pisa
Takalo, Leo O.
Finland, Turku
Turun Yliopisto
Tavecchio, Fabrizio
Italy, Rome
Istituto Nazionale Di Astrofisica, Rome
Terzić, Tomislav
Croatia, Split
University of Split
Teshima, Masahiro
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
Tibolla, Omar
Germany, Wurzburg
Julius-maximilians-universität Würzburg
Torres, Diego F.
Spain, Barcelona
Csic - Instituto de Ciencias Del Espacio Ice
Spain, Barcelona
Institució Catalana de Recerca I Estudis Avançats
Treves, Aldo
Italy, Varese
Università Degli Studi Dell'insubria
Zabalza, Víctor
Spain, Barcelona
Instituto de Estudios Espaciales de Cataluña
Zanin, Roberta
Spain, Cerdanyola Del Valles
Institut de Física D'altes Energies, Bellaterra
Fornasa, Mattia
Spain, Madrid
Consejo Superior de Investigaciones Científicas
Essig, Rouven
United States, Menlo Park
Slac National Accelerator Laboratory
Sehgal, Neelima
United States, Palo Alto
Stanford University
Strigari, Louis E.
United States, Palo Alto
Stanford University
Statistics
Citations: 83
Authors: 111
Affiliations: 27
Identifiers
Doi:
10.1088/1475-7516/2011/06/035
ISSN:
14757516
Research Areas
Environmental