A search for point sources of EeV neutrons
Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
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Data(s) |
07/11/2013
07/11/2013
2012
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Resumo |
A thorough search of the sky exposed at the Pierre Auger Cosmic Ray Observatory reveals no statistically significant excess of events in any small solid angle that would be indicative of a flux of neutral particles from a discrete source. The search covers from -90 degrees to +15 degrees in declination using four different energy ranges above 1 EeV (10(18) eV). The method used in this search is more sensitive to neutrons than to photons. The upper limit on a neutron flux is derived for a dense grid of directions for each of the four energy ranges. These results constrain scenarios for the production of ultrahigh energy cosmic rays in the Galaxy. Comision Nacional de Energia Atomica, Argentina Fundacion Antorchas Gobierno De La Provincia de Mendoza, Municipalidad de Malargue, Argentina NDM Holdings Valle Las Lenas, Argentina Australian Research Council Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq) Financiadora de Estudos e Projetos (FINEP) Fundacao de Amparo a Pesquisa do Estado do Rio de Janeiro (FAPERJ) Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) Ministerio de Ciencia e Tecnologia (MCT), Brazil Academy of Sciences of the Czech Republic [AVCR [AV0Z10100502, AV0Z10100522, GAAV KJB100100904, MSMT-CR LA08016, LG11044, LC527, 1M06002, MSM0021620859] Centre de Calcul IN2P3/CNRS, Centre National de la Recherche Scientifique (CNRS) Conseil Regional Ile-de-France, Departement Physique Nucleaire et Corpusculaire (PNC-IN2P3/CNRS) Departement Sciences de l'Univers (SDU-INSU/CNRS), France Bundesministerium fur Bildung und Forschung (BMBF) Deutsche Forschungsgemeinschaft (DFG) Finanzministerium Baden-Wurttemberg, Helmholtz-Gemeinschaft Deutscher Forschungszentren (HGF) Ministerium fur Wissenschaft und Forschung, Nordrhein-Westfalen Ministerium fur Wissenschaft, Forschung und Kunst, Baden-Wurttemberg, Germany Istituto Nazionale di Fisica Nucleare (INFN) Ministero dell'Istruzione, dell'Universita e della Ricerca (MIUR), Italy Consejo Nacional de Ciencia y Tecnologia (CONACYT), Mexico Ministerie van Onderwijs, Cultuur en Wetenschap, Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO) Stichting voor Fundamenteel Onderzoek der Materie (FOM), The Netherlands Ministry of Science and Higher Education, Poland [N N202 200239, N N202 207238] Fundacao para a Ciencia e a Tecnologia, Portugal Higher Education, Science, and Technology, Slovenian Research Agency, Slovenia Comunidad de Madrid, Consejeria de Educacion de la Comunidad de Castilla La Mancha FEDER Ministerio de Ciencia e Innovacion, Xunta de Galicia, Spain Consolider-Ingenio (CPAN) Science and Technology Facilities Council, United Kingdom Department of Energy [DE-AC02-07CH11359, DE-FR02-04ER41300] National Science Foundation [0450696] The Grainger Foundation, USA ALFA-EC/HELEN European Union [MEIF-CT-2005-025057, PIEF-GA-2008-220240] UNESCO |
Identificador |
Astrophysical Journal, Bristol, v. 760, n. 2, p. 1-11, Dec. 2012 0004-637X http://www.producao.usp.br/handle/BDPI/43184 10.1088/0004-637X/760/2/148 |
Idioma(s) |
eng |
Publicador |
IOP PUBLISHING LTD BRISTOL |
Relação |
Astrophysical Journal |
Direitos |
closedAccess Copyright IOP PUBLISHING LTD |
Palavras-Chave | #COSMIC RAYS #GALAXY: DISK #METHODS: DATA ANALYSIS #MASSIVE BLACK-HOLE #GALACTIC-CENTER #COSMIC-RAYS #GAMMA-RAYS #ANISOTROPY #ASTRONOMY #ASTRONOMY & ASTROPHYSICS |
Tipo |
article original article publishedVersion |