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dc.date.accessioned 2019-09-06T13:23:04Z
dc.date.available 2019-09-06T13:23:04Z
dc.date.issued 2009-05-03
dc.identifier.uri http://sedici.unlp.edu.ar/handle/10915/80633
dc.description.abstract From direct observations of the longitudinal development of ultra-high energy air showers performed with the Pierre Auger Observatory, upper limits of 3.8%, 2.4%, 3.5% and 11.7% (at 95% c.l.) are obtained on the fraction of cosmic-ray photons above 2, 3, 5 and 10 EeV (1 EeV ≣ 1018 eV), respectively. These are the first experimental limits on ultra-high energy photons at energies below 10 EeV. The results complement previous constraints on top–down models from array data and they reduce systematic uncertainties in the interpretation of shower data in terms of primary flux, nuclear composition and protonair cross-section. en
dc.format.extent 399-406 es
dc.language en es
dc.subject Cascada atmosférica es
dc.subject Pierre Auger Observatory es
dc.subject Radiación cósmica es
dc.subject Fotones es
dc.title Upper limit on the cosmic-ray photon fraction at EeV energies from the Pierre Auger Observatory en
dc.type Articulo es
sedici.identifier.other https://doi.org/10.1016/j.astropartphys.2009.04.003 es
sedici.identifier.issn 0927-6505 es
sedici.creator.person Badagnani, Daniel Omar es
sedici.creator.person Dova, María Teresa es
sedici.creator.person Gómez Albarracín, Flavia Alejandra es
sedici.creator.person Hansen, Patricia María es
sedici.creator.person Mariazzi, Analisa Gabriela es
sedici.creator.person Moreno, Juan Cruz es
sedici.creator.person Tarutina, Tatiana es
sedici.creator.person Tueros, Matías Jorge es
sedici.creator.person Wahlberg, Hernán Pablo es
sedici.creator.person The Pierre Auger Collaboration es
sedici.subject.materias Ciencias Exactas es
sedici.subject.materias Física es
sedici.description.fulltext true es
mods.originInfo.place Facultad de Ciencias Exactas es
sedici.subtype Articulo es
sedici.rights.license Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
sedici.rights.uri http://creativecommons.org/licenses/by-nc-sa/4.0/
sedici.description.peerReview peer-review es
sedici.relation.journalTitle Astroparticle Physics es
sedici.relation.journalVolumeAndIssue vol. 31, no. 6 es


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Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) Except where otherwise noted, this item's license is described as Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)