Atmospheric effects on extensive air showers observed with the surface detector of the Pierre Auger observatory
Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
---|---|
Data(s) |
20/10/2012
20/10/2012
2009
|
Resumo |
Atmospheric parameters, Such as pressure (P), temperature (T) and density (rho proportional to P/T), affect the development of extensive air showers initiated by energetic cosmic rays. We have Studied the impact of atmospheric variations on extensive air showers by means of the surface detector of the Pierre Auger Observatory. The rate of events shows a similar to 10% seasonal modulation and similar to 2% diurnal one. We find that the observed behaviour is explained by a model including the effects associated with the variations of P and rho. The former affects the longitudinal development of air showers while the latter influences the Moliere radius and hence the lateral distribution of the shower particles. The model is validated with full simulations of extensive air showers using atmospheric profiles measured at the site of the Pierre Auger Observatory. (C) 2009 Elsevier B.V. All rights reserved. Comisión Nacional de Energía Atómica, Argentina Fundacion Antorchas Gobierno De La Provincia de Mendoza, Municipalidad de Malargue, Argentina NDM Holdings Valle Las Lenas, Argentina Australian Research Council (ARC) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Financiadora de Estudos e Projetos (FINEP) Fundação de Amparo à Pesquisa do Estado do 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) [AVOZ10100502], [AVOZ10100522] Czech Republic, GAAV [KJB300100801], [KJB100100904] Czech Republic, MSMT-CR [LA08016], [LC527], [1M06002], [MSM0021620859] Centre de Calcul IN2P3/CNRS Centre National de la Recherche Scientifique (CNRS) Conseil Regional Ile-de-France, Departement Physique Nuclaire et Corpusculaire (PNC-IN2P3/CNRS) Departement Sciences de I`Univers (SDU-INSU/CNRS), France Bundesministerium fur Bildung und Forschung (BMBF) Deutsche Forschungsgerneinschaft (DFG) Helmholtz-Gemeinschaft Deutscher Forschungszentren (HGF) Finanzministerium Baden-Wurttemberg 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) Foundation for Fundamental Research on Matter (FOM) (Stichting voor Fundamenteel Onderzoek der Materie), The Netherlands Ministry of Science and Higher Education, Poland[1 P03 D 014 30], [N202 090 31/0623], [PAP/218/2006] Fundacao para a Ciencia e a Tecnologia (FCT), Portugal Ministry for Higher Education, Science, and Technology, Slovenian Research Agency, Slovenia Comunidad de Madrid, Spain Consejeria de Educacion de la Comunidad de Castilla La Mancha Fondo Europeo de Desarrollo Regional (FEDER) Ministerio de Ciencia e Innovacion, Xunta de Galicia, Spain Science and Technology Facilities Council, United Kingdom Department of Energy (DOE)[DE-AC02-07CH11359] National Science Foundation (NSF)[0450696] Grainger Foundation USA ALFA-EC/HELEN European Union[MEIF-CT-2005-025057, PIEF-GA-2008-220240] United Nations Educational, Scientific and Cultural Organization (UNESCO) |
Identificador |
ASTROPARTICLE PHYSICS, AMSTERDAM, v.32, n.2, p.89-99, 2009 0927-6505 http://producao.usp.br/handle/BDPI/29927 10.1016/j.astropartphys.2009.06.004 |
Idioma(s) |
eng |
Publicador |
ELSEVIER SCIENCE BV AMSTERDAM |
Relação |
Astroparticle Physics |
Direitos |
restrictedAccess Copyright ELSEVIER SCIENCE BV |
Palavras-Chave | #Extensive air showers #UHECR #Atmosphere #Weather #COSMIC-RAY CASCADES #ENERGY #RECONSTRUCTION #SIMULATION #PROFILES #IMPACT #Astronomy & Astrophysics #Physics, Particles & Fields |
Tipo |
article original article publishedVersion |