Search for Large-scale Anisotropy on Arrival Directions of Ultra-high-energy Cosmic Rays Observed with the Telescope Array Experiment
- Title
- Search for Large-scale Anisotropy on Arrival Directions of Ultra-high-energy Cosmic Rays Observed with the Telescope Array Experiment
- Author
- 김항배
- Keywords
- Cosmic rays; Ultra-high-energy cosmic radiation; Cosmic ray sources; Cosmic ray showers; Cosmic ray detectors; Cosmic ray astronomy; Extragalactic astronomy; Extragalactic magnetic fields
- Issue Date
- 2020-07
- Publisher
- IOP PUBLISHING LTD
- Citation
- ASTROPHYSICAL JOURNAL LETTERS, v. 898, no. 2, article no. L28
- 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 degrees 33 degrees. 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.
- URI
- https://iopscience.iop.org/article/10.3847/2041-8213/aba0bchttps://repository.hanyang.ac.kr/handle/20.500.11754/169237
- ISSN
- 2041-8205; 2041-8213
- DOI
- 10.3847/2041-8213/aba0bc
- Appears in Collections:
- COLLEGE OF NATURAL SCIENCES[S](자연과학대학) > PHYSICS(물리학과) > Articles
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