EVOLUTION OF THE COSMIC-RAY ANISOTROPY ABOVE 1014 eV

被引:119
作者
Aglietta, M. [1 ,2 ]
Alekseenko, V. V.
Alessandro, B. [2 ]
Antonioli, P. [3 ]
Arneodo, F. [4 ]
Bergamasco, L. [2 ,5 ]
Bertaina, M. [2 ,5 ]
Bonino, R. [1 ,2 ]
Castellina, A. [1 ,2 ]
Chiavassa, A. [2 ,5 ]
Piazzoli, B. D'Ettorre [6 ]
Di Sciascio, G. [6 ]
Fulgione, W. [1 ,2 ]
Galeotti, P. [2 ,5 ]
Ghia, P. L. [1 ,4 ]
Iacovacci, M. [6 ]
Mannocchi, G. [1 ,2 ]
Morello, C. [1 ,2 ]
Navarra, G. [2 ,5 ]
Saavedra, O. [2 ,5 ]
Stamerra, A. [5 ]
Trinchero, G. C. [1 ,2 ]
Valchierotti, S. [2 ,5 ]
Vallania, P. [1 ,2 ]
Vernetto, S. [1 ,2 ]
Vigorito, C. [2 ,5 ]
机构
[1] INAF, Ist Fis Spazio Interplanetario, Turin, Italy
[2] Ist Nazl Fis Nucl, I-10125 Turin, Italy
[3] Ist Nazl Fis Nucl, I-40126 Bologna, Italy
[4] Ist Nazl Fis Nucl, Lab Nazl Gran Sasso, Assergi, AQ, Italy
[5] Univ Turin, Dipartimento Fis Gen, Turin, Italy
[6] Ist Nazl Fis Nucl, Dipartimento Sci Fis, I-80125 Naples, Italy
关键词
cosmic rays; diffusion; SUPERNOVA-REMNANTS; EAS-TOP; INTENSITY; KASCADE;
D O I
10.1088/0004-637X/692/2/L130
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
The amplitude and phase of the cosmic-ray anisotropy are well established experimentally between 10(11) eV and 10(14) eV. The study of their evolution in the energy region 10(14)-10(16) eV can provide a significant tool for the understanding of the steepening ("knee") of the primary spectrum. In this Letter, we extend the EAS-TOP measurement performed at E-0 approximate to 10(14) eV to higher energies by using the full data set ( eight years of data taking). Results derived at about 10(14) and 4 x 10(14) eV are compared and discussed. Hints of increasing amplitude and change of phase above 10(14) eV are reported. The significance of the observation for the understanding of cosmic-ray propagation is discussed.
引用
收藏
页码:L130 / L133
页数:4
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