Search for first harmonic modulation in the right ascension distribution of cosmic rays detected at the Pierre Auger Observatory
Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
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Data(s) |
20/10/2012
20/10/2012
2011
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Resumo |
We present the results of searches for dipolar-type anisotropies in different energy ranges above 2.5 x 10(17) eV with the surface detector array of the Pierre Auger Observatory, reporting on both the phase and the amplitude measurements of the first harmonic modulation in the right-ascension distribution. Upper limits on the amplitudes are obtained, which provide the most stringent bounds at present, being below 2% at 99% C.L. for EeV energies. We also compare our results to those of previous experiments as well as with some theoretical expectations. (C) 2011 Elsevier B.V. All rights reserved. Comisión Nacional de Energía Atómica, Argentina Fundación Antorchas Gobierno De La Provincia de Mendoza, Municipalidad de Malargüe, Argentina NDM Holdings Valle Las Leñas, Argentina Australian Research Council Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Financiadora de Estudos e Projetos (FINEP) Fundação de Amparo à Pesquisa do Estado de Rio de Janeiro (FAPERJ) Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Ministério da Ciência, Tecnologia e Inovação do Brasil (MCTI) Academy of Sciences of the Czech Republic [AVCR, AV0Z10100502, AV0Z10100522, GAAV, KJB300100801, KJB100100904, MSMT-CR LA08016, LC527, 1M06002, MSM0021620859] Centre de Calcul IN2P3/CNRS, Centre National de la Recherche Scientifique (CNRS) Conseil Régional Ile-de-France, Département Physique Nucléaire et Corpusculaire (PNC-IN2P3/CNRS) Département Sciences de l’Univers (SDU-INSU/CNRS), France Bundesministerium für Bildung und Forschung (BMBF) Deutsche Forschungsgemeinschaft (DFG) Finanzministerium Baden – Württemberg, Helmholtz-Gemeinschaft Deutscher Forschungszentren (HGF) Ministerium für Wissenschaft und Forschung, Nordrhein-Westfalen, Germany Ministerium für Wissenschaft, Forschung und Kunst, Baden-Württemberg, Germany Istituto Nazionale di Fisica Nucleare (INFN), Italy Istituto Nazionale di Astrofisica (INAF), Italy Ministero dell’Istruzione, dell’Università e della Ricerca (MIUR), Italy Gran Sasso Center for Astroparticle Physics (CFA), Italy Consejo Nacional de Ciencia y Tecnología (CONACYT), Mexico Ministerie van Onderwijs, Cultuur en Wetens, chap, Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO), Netherlands Stichting voor Fundamenteel Onderzoek der Materie (FOM), Netherlands Ministry of Science and Higher Education, Poland [1 P03 D 014 30, N N202 207238] Fundação para a Ciência e a Tecnologia, Portugal Ministry for Higher Education, Science, and Technology, Slovenian Research Agency, Slovenia Comunidad de Madrid, Consejería de Educación de la Comunidad de Castilla La Mancha FEDER funds Ministerio de Ciencia e Innovación and Consolider-Ingenio 2010 (CPAN) Generalitat Valenciana, Spain Junta de Andalucía, Spain Xunta de Galicia, Spain Science and Technology Facilities Council, United Kingdom Department of Energy (DOE) [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 |
ASTROPARTICLE PHYSICS, AMSTERDAM, v.34, n.8, p.627-639, 2011 0927-6505 http://producao.usp.br/handle/BDPI/30074 10.1016/j.astropartphys.2010.12.007 |
Idioma(s) |
eng |
Publicador |
ELSEVIER SCIENCE BV AMSTERDAM |
Relação |
Astroparticle Physics |
Direitos |
restrictedAccess Copyright ELSEVIER SCIENCE BV |
Palavras-Chave | #Ultra-high energy cosmic rays #Large scale anisotropies #Pierre Auger Observatory #ENERGY-SPECTRUM #SURFACE DETECTOR #ANISOTROPY #ARRAY #ORIGIN #Astronomy & Astrophysics #Physics, Particles & Fields |
Tipo |
article original article publishedVersion |