 
|
|
|
ヒビノ キンヤ
Hibino Kinya 日比野 欣也 所属 神奈川大学 工学部 応用物理学科 神奈川大学大学院 工学研究科 工学専攻（応用物理学領域） 職種 教授 |
|
| 言語種別 | 英語 |
| 発行・発表の年月 | 2024/07 |
| 形態種別 | 学術雑誌 |
| 査読 | 査読あり |
| 標題 | Mass composition of ultrahigh energy cosmic rays from distribution of their arrival directions with the Telescope Array |
| 執筆形態 | 共著 |
| 掲載誌名 | Physical Review D |
| 掲載区分 | 国外 |
| 巻・号・頁 | (110),pp.022006 |
| 国際共著 | 国際共著 |
| 概要 | We use a new method to estimate the injected mass composition of ultrahigh cosmic rays (UHECRs) at energies higher than 10 EeV. The method is based on comparison of the energy-dependent distribution of cosmic ray arrival directions as measured by the Telescope Array (TA) experiment with that calculated in a given putative model of UHECR under the assumption that sources trace the large-scale structure (LSS) of the Universe. The assumption of weak EGMF, however, strongly affects this interpretation at all but the highest energies E>100 EeV, where the remarkable isotropy of the data implies a heavy injected composition even in the case of strong EGMF. This result also holds if UHECR sources are as rare as 2 x10-5 Mpc-3, that is the conservative lower limit for the source number density. |
Copyright © Kanagawa University. All Rights Reserved.