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dc.contributor.author
Medina, Maria Clementina
dc.contributor.author
H.E.S.S. Collaboration
dc.date.available
2016-03-04T20:13:34Z
dc.date.issued
2013-01
dc.identifier.citation
Medina, Maria Clementina; H.E.S.S. Collaboration; Search for photon-linelike signatures from dark matter annihilations with H.E.S.S.; American Physical Society; Physical Review Letters; 110; 1-2013; 41301-41307
dc.identifier.issn
0031-9007
dc.identifier.uri
http://hdl.handle.net/11336/4637
dc.description.abstract
Gamma-ray line signatures can be expected in the very-high-energy (VHE; E_\gamma > 100 GeV) domain due to self-annihilation or decay of dark matter (DM) particles in space. Such a signal would be readily distinguishable from astrophysical \gamma-ray sources that in most cases produce continuous spectra which span over several orders of magnitude in energy. Using data collected with the H.E.S.S. \gamma-ray instrument, upper limits on line-like emission are obtained in the energy range between ~500 GeV and ~25 TeV for the central part of the Milky Way halo and for extragalactic observations, complementing recent limits obtained with the Fermi-LAT instrument at lower energies. No statistically significant signal could be found. For monochromatic \gamma-ray line emission, flux limits of (2x10^-7 - 2x10^-5) m^-2 s^-1 sr^-1 and (1x10^-8 - 2x10^-6) m^-2 s^-1 sr^-1 are obtained for the central part of the Milky Way halo and extragalactic observations, respectively. For a DM particle mass of 1 TeV, limits on the velocity-averaged DM annihilation cross section < \sigma v >(\chi\chi -> \gamma\gamma) reach ~10^-27 cm^3 s^-1, based on the Einasto parametrization of the Galactic DM halo density profile.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
American Physical Society
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Gamma-Rays
dc.subject
Dark Matter Annihilations
dc.subject.classification
Astronomía
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Ciencias Físicas
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CIENCIAS NATURALES Y EXACTAS
dc.title
Search for photon-linelike signatures from dark matter annihilations with H.E.S.S.
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2016-03-30 10:35:44.97925-03
dc.journal.volume
110
dc.journal.pagination
41301-41307
dc.journal.pais
Estados Unidos
dc.journal.ciudad
New York
dc.description.fil
Fil: Medina, Maria Clementina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata. Instituto Argentino de Radioastronomia (i); Argentina
dc.description.fil
Fil: H.E.S.S. Collaboration. No especifíca;
dc.journal.title
Physical Review Letters
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/arxiv/http://arxiv.org/abs/1301.1173
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1103/PhysRevLett.110.041301
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.110.041301
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