Search for large-scale anisotropy on arrival directions of ultra-high-energy cosmic rays observed with the telescope array experiment
Motivated by the detection of a significant dipole structure in the arrival directions of ultra-high-energy cosmic rays above 8 EeV reported by the Pierre Auger Observatory (Auger), we search for a large-scale anisotropy using data collected with the surface detector array of the Telescope Array Experiment (TA). With 11 yr of TA data, a dipole structure in a projection of the R.A. is fitted with an amplitude of 3.3% ± 1.9% and a phase of 131° ± 33°. The corresponding 99% confidence-level upper limit on the amplitude is 7.3%. At the current level of statistics, the fitted result is compatible with both an isotropic distribution and the dipole structure reported by Auger.
2020
2021-02-05 04:11:32
1033
cosmic rays, ultra-high-energy cosmic radiation, cosmic ray sources, cosmic ray showers, cosmic ray detectors, cosmic ray astronomy, extragalactic astronomy
R. U.
Abbasi
70
Mitsuhiro
Abe
70
T.
Abu-Zayyad
70
M.
Allen
70
R.
Azuma
70
E.
Barcikowski
70
J. W.
Belz
70
Douglas R.
Bergman
70
S. A.
Blake
70
Jon Paul
Lundquist
70
COBISS_ID
3
50454275
UDK
4
524
ISSN pri članku
9
2041-8205
OceCobissID
13
2468603
DOI
15
10.3847/2041-8213/aba0bc
NUK URN
18
URN:SI:UNG:REP:CJ4NTZNV
2007.00023.pdf
561307
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0
Izvorni URL
2021-02-05 04:11:46