Large-scale distribution of cosmic rays in right ascension as observed by the Yakutsk array at energies above $10^{18}$ eV
| Autor: | Ivanov, A. A., Krasilnikov, A. D., Pravdin, M. I., Sabourov, A. V. |
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| Rok vydání: | 2014 |
| Předmět: | |
| Zdroj: | Astroparticle Physics 62 (2015) 1 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1016/j.astropartphys.2014.07.002 |
| Popis: | We present the results of searches for anisotropy in the right ascension ($RA$) distribution of arrival directions of cosmic rays (CRs) detected with the Yakutsk array during the 1974--2008 observational period in the energy range above $10^{18}$ eV. Two methods of analysis are applied to two sub-samples of the data. Particularly, estimations of the first and second harmonic amplitudes are given, as well as the first harmonic phase in adjacent energy intervals. Analysis of variance demonstrates a significant contraction of the minimal width of the $RA$ distribution in the energy bin $(10^{19},1.78\times10^{19})$ eV with respect to the isotropic distribution, which may be attributed to a possible source of CRs within the interval $RA\in(15^0,45^0)$. Comment: 8 pages, 6 figures, 2 tables, accepted for publication in Astroparticle Physics |
| Databáze: | arXiv |
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