The mass of cosmic rays above 10<sup>17</sup> eV
- Autores
- Dova, María Teresa; Mariazzi, Analisa Gabriela; Watson, Alan
- Año de publicación
- 2005
- Idioma
- inglés
- Tipo de recurso
- documento de conferencia
- Estado
- versión publicada
- Descripción
- Interpretation of the energy spectrum and arrival distribution of cosmic rays is complicated by lack of knowledge of the nature of the primaries. We review claims for the mass composition above 10 17 eV where it can be determined only indirectly from air-shower observables. Difficulties in comparisons between data arise because, inevitably, a set of measurements is interpreted using the best model of hadronic interactions available at the time of analysis. We discuss the situation and conclude that the evidence for a proton-dominated mass composition, even at the highest energies, is unconvincing. However, it may be that there are consistent differences between mass measurements from optical techniques and those based upon other shower observables. We also find that iron nuclei of ultra high energy can probably escape from the galaxies that host GRBs, possible cosmic ray accelerators. The accelerators must lie nearby.
Facultad de Ciencias Exactas - Materia
-
Ciencias Exactas
Física
Radiación Cósmica
Método experimental - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- http://creativecommons.org/licenses/by-nc-sa/4.0/
- Repositorio
.jpg)
- Institución
- Universidad Nacional de La Plata
- OAI Identificador
- oai:sedici.unlp.edu.ar:10915/81571
Ver los metadatos del registro completo
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The mass of cosmic rays above 10<sup>17</sup> eVDova, María TeresaMariazzi, Analisa GabrielaWatson, AlanCiencias ExactasFísicaRadiación CósmicaMétodo experimentalInterpretation of the energy spectrum and arrival distribution of cosmic rays is complicated by lack of knowledge of the nature of the primaries. We review claims for the mass composition above 10 <sup>17</sup> eV where it can be determined only indirectly from air-shower observables. Difficulties in comparisons between data arise because, inevitably, a set of measurements is interpreted using the best model of hadronic interactions available at the time of analysis. We discuss the situation and conclude that the evidence for a proton-dominated mass composition, even at the highest energies, is unconvincing. However, it may be that there are consistent differences between mass measurements from optical techniques and those based upon other shower observables. We also find that iron nuclei of ultra high energy can probably escape from the galaxies that host GRBs, possible cosmic ray accelerators. The accelerators must lie nearby.Facultad de Ciencias Exactas2005-08info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionObjeto de conferenciahttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciaapplication/pdf101-104http://sedici.unlp.edu.ar/handle/10915/81571enginfo:eu-repo/semantics/altIdentifier/url/http://www.icrr.u-tokyo.ac.jp/can/icrc2005/Proceedings/Vol-17/17275-uki-mariazzi-A-abs1-he14-oral.pdfinfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-17T09:57:56Zoai:sedici.unlp.edu.ar:10915/81571Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-17 09:57:56.928SEDICI (UNLP) - Universidad Nacional de La Platafalse |
| dc.title.none.fl_str_mv |
The mass of cosmic rays above 10<sup>17</sup> eV |
| title |
The mass of cosmic rays above 10<sup>17</sup> eV |
| spellingShingle |
The mass of cosmic rays above 10<sup>17</sup> eV Dova, María Teresa Ciencias Exactas Física Radiación Cósmica Método experimental |
| title_short |
The mass of cosmic rays above 10<sup>17</sup> eV |
| title_full |
The mass of cosmic rays above 10<sup>17</sup> eV |
| title_fullStr |
The mass of cosmic rays above 10<sup>17</sup> eV |
| title_full_unstemmed |
The mass of cosmic rays above 10<sup>17</sup> eV |
| title_sort |
The mass of cosmic rays above 10<sup>17</sup> eV |
| dc.creator.none.fl_str_mv |
Dova, María Teresa Mariazzi, Analisa Gabriela Watson, Alan |
| author |
Dova, María Teresa |
| author_facet |
Dova, María Teresa Mariazzi, Analisa Gabriela Watson, Alan |
| author_role |
author |
| author2 |
Mariazzi, Analisa Gabriela Watson, Alan |
| author2_role |
author author |
| dc.subject.none.fl_str_mv |
Ciencias Exactas Física Radiación Cósmica Método experimental |
| topic |
Ciencias Exactas Física Radiación Cósmica Método experimental |
| dc.description.none.fl_txt_mv |
Interpretation of the energy spectrum and arrival distribution of cosmic rays is complicated by lack of knowledge of the nature of the primaries. We review claims for the mass composition above 10 <sup>17</sup> eV where it can be determined only indirectly from air-shower observables. Difficulties in comparisons between data arise because, inevitably, a set of measurements is interpreted using the best model of hadronic interactions available at the time of analysis. We discuss the situation and conclude that the evidence for a proton-dominated mass composition, even at the highest energies, is unconvincing. However, it may be that there are consistent differences between mass measurements from optical techniques and those based upon other shower observables. We also find that iron nuclei of ultra high energy can probably escape from the galaxies that host GRBs, possible cosmic ray accelerators. The accelerators must lie nearby. Facultad de Ciencias Exactas |
| description |
Interpretation of the energy spectrum and arrival distribution of cosmic rays is complicated by lack of knowledge of the nature of the primaries. We review claims for the mass composition above 10 <sup>17</sup> eV where it can be determined only indirectly from air-shower observables. Difficulties in comparisons between data arise because, inevitably, a set of measurements is interpreted using the best model of hadronic interactions available at the time of analysis. We discuss the situation and conclude that the evidence for a proton-dominated mass composition, even at the highest energies, is unconvincing. However, it may be that there are consistent differences between mass measurements from optical techniques and those based upon other shower observables. We also find that iron nuclei of ultra high energy can probably escape from the galaxies that host GRBs, possible cosmic ray accelerators. The accelerators must lie nearby. |
| publishDate |
2005 |
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2005-08 |
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eng |
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eng |
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