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Title: Galactic Cosmic-Ray Anisotropy in the Northern Hemisphere from the ARGO-YBJ Experiment during 2008-2012
Authors: B. Bartoli
P. Bernardini
X. J. Bi
Z. Cao
S. Catalanotti
S. Z. Chen
T. L. Chen
S. W. Cui
B. Z. Dai
A. D'Amone
I. De Mitri
B. D.Ettorre Piazzoli
T. Di Girolamo
G. Di Sciascio
C. F. Feng
Z. Y. Feng
W. Gao
Q. B. Gou
Y. Q. Guo
H. H. He
Haibing Hu
Hongbo Hu
M. Iacovacci
R. Iuppa
H. Y. Jia
H. J. Li
C. Liu
J. Liu
M. Y. Liu
H. Lu
L. L. Ma
X. H. Ma
G. Mancarella
S. M. Mari
G. Marsella
S. Mastroianni
P. Montini
C. C. Ning
L. Perrone
P. Pistilli
D. Ruffolo
P. Salvini
R. Santonico
P. R. Shen
X. D. Sheng
F. Shi
A. Surdo
Y. H. Tan
P. Vallania
S. Vernetto
C. Vigorito
H. Wang
C. Y. Wu
H. R. Wu
L. Xue
Q. Y. Yang
X. C. Yang
Z. G. Yao
A. F. Yuan
M. Zha
H. M. Zhang
L. Zhang
X. Y. Zhang
Y. Zhang
J. Zhao
X. X. Zhou
F. R. Zhu
Q. Q. Zhu
Trento Institute for Fundamental Physics and Applications
Istituto Nazionale di Fisica Nucleare, Sezione di Lecce
Istituto Nazionale di Fisica Nucleare, Sezione di Torino
Istituto Nazionale di Fisica Nucleare, Sezione di Pavia
Istituto Nazionale di Fisica Nucleare, Sezione di Napoli
Università degli Studi di Roma La Sapienza
Shandong University
Istituto Nazionale Di Astrofisica, Rome
Yunnan University
Institute of High Energy Physics Chinese Academy of Science
Università degli Studi di Roma Tor Vergata
University of Chinese Academy of Sciences
Istituto Nazionale di Fisica Nucleare - INFN
Università degli Studi di Napoli Federico II
Mahidol University
Università degli Studi Roma Tre
Università degli Studi di Torino
Southwest Jiaotong University
Hebei Normal University
Tibet University
Dipartimento di Fisica
Gran Sasso Science Institute
Dipartimento di Matematica Ennio de Giorgi
Keywords: Earth and Planetary Sciences;Physics and Astronomy
Issue Date: 10-Jul-2018
Citation: Astrophysical Journal. Vol.861, No.2 (2018)
Abstract: © 2018. The American Astronomical Society. All rights reserved. This paper reports on the observation of the sidereal large-scale anisotropy of cosmic rays using data collected by the ARGO-YBJ experiment over 5 years (2008-2012). This analysis extends previous work limited to the period from 2008 January to 2009 December, near the minimum of solar activity between cycles 23 and 24. With the new data sample, the period of solar cycle 24 from near minimum to maximum is investigated. A new method is used to improve the energy reconstruction, allowing us to cover a much wider energy range, from 4 to 520 TeV. Below 100 TeV, the anisotropy is dominated by two wide regions, the so-called "tail-in" and "loss-cone" features. At higher energies, a dramatic change of the morphology is confirmed. The yearly time dependence of the anisotropy is investigated. Finally, no noticeable variation of cosmic-ray anisotropy with solar activity is observed for a median energy of 7 TeV.
ISSN: 15384357
Appears in Collections:Scopus 2018

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