https://repositorio.ufba.br/handle/ri/16003
metadata.dc.type: | Artigo de Periódico |
Título : | Anisotropy studies around the galactic centre at EeV energies with the Auger Observatory |
Otros títulos : | Astroparticle Physics |
Autor : | Abraham, J. Aglietta, M. Aguirre, C. Allard, D. Allekotte, I. Allison, P. Pepe, Iuri Muniz Mello Junior, Walter José Medeiros de Guedes, Germano Pinto |
metadata.dc.creator: | Abraham, J. Aglietta, M. Aguirre, C. Allard, D. Allekotte, I. Allison, P. Pepe, Iuri Muniz Mello Junior, Walter José Medeiros de Guedes, Germano Pinto |
Resumen : | Data from the Pierre Auger Observatory are analyzed to search for anisotropies near the direction of the Galactic Centre at EeV energies. The exposure of the surface array in this part of the sky is already significantly larger than that of the fore-runner experiments. Our results do not support previous findings of localized excesses in the AGASA and SUGAR data. We set an upper bound on a point-like flux of cosmic rays arriving from the Galactic Centre which excludes several scenarios predicting sources of EeV neutrons from Sagittarius A. Also the events detected simultaneously by the surface and fluorescence detectors (the ‘hybrid’ data set), which have better pointing accuracy but are less numerous than those of the surface array alone, do not show any significant localized excess from this direction. |
Palabras clave : | Cosmic rays Anisotropies Galactic centre |
metadata.dc.rights: | Acesso Aberto |
URI : | http://repositorio.ufba.br/ri/handle/ri/16003 |
Fecha de publicación : | 2007 |
Aparece en las colecciones: | Artigo Publicado em Periódico (FIS) |
Fichero | Descripción | Tamaño | Formato | |
---|---|---|---|---|
1-s2.0-S0927650506001733-main.pdf | 456,9 kB | Adobe PDF | Visualizar/Abrir |
Los ítems de DSpace están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.