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Title:Search for large-scale anisotropy on arrival directions of ultra-high-energy cosmic rays observed with the telescope array experiment
Authors:ID Abbasi, R. U. (Author)
ID Abe, Mitsuhiro (Author)
ID Abu-Zayyad, T. (Author)
ID Allen, M. (Author)
ID Azuma, R. (Author)
ID Barcikowski, E. (Author)
ID Belz, J. W. (Author)
ID Bergman, Douglas R. (Author)
ID Blake, S. A. (Author)
ID Lundquist, Jon Paul (Author)
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Language:English
Work type:Unknown
Typology:1.01 - Original Scientific Article
Organization:UNG - University of Nova Gorica
Abstract: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.
Keywords:cosmic rays, ultra-high-energy cosmic radiation, cosmic ray sources, cosmic ray showers, cosmic ray detectors, cosmic ray astronomy, extragalactic astronomy
Year of publishing:2020
Number of pages:str. 1-5
Numbering:Vol. 8989, no. 2
PID:20.500.12556/RUNG-6248 New window
COBISS.SI-ID:50454275 New window
UDC:524
ISSN on article:2041-8205
DOI:10.3847/2041-8213/aba0bc New window
NUK URN:URN:SI:UNG:REP:CJ4NTZNV
Publication date in RUNG:05.02.2021
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Record is a part of a journal

Title:The astrophysical journal. Letters
Publisher:IOP Publishing
ISSN:2041-8205
COBISS.SI-ID:2468603 New window

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