超高能宇宙射线各向同性暗示其重质量组成
高能天体物理现象
2024-07-04 v2
摘要
我们对能量高于 10 EeV 的超高能宇宙射线（UHECRs）的注入质量组成进行了估计。通过将 Telescope Array 表面探测器观测到的 UHECR 事件能量依赖的天空分布与局部宇宙的大尺度结构进行比较来推断组成。在额外星际磁场可忽略的情况下，结果在 E ~ 10 EeV 时与相对重的注入组成一致，但在 E ~ 100 EeV 时变为较轻，而在 E > 100 EeV 时的组成非常重。即使在最高实验允许的强 EGMF 下，后者也成立，而低能量处的组成若存在强 EGMF 也可以为轻组成。星际磁场不确定性对这些结果的影响微不足道。
关键词
引用
@article{arxiv.2406.19287,
title = {Isotropy of cosmic rays beyond $10^{20}$ eV favors their heavy mass composition},
author = {Telescope Array Collaboration and R. U. Abbasi and Y. Abe and T. Abu-Zayyad and M. Allen and Y. Arai and R. Arimura and E. Barcikowski and J. W. Belz and D. R. Bergman and S. A. Blake and I. Buckland and B. G. Cheon and M. Chikawa and T. Fujii and K. Fujisue and K. Fujita and R. Fujiwara and M. Fukushima and G. Furlich and N. Globus and R. Gonzalez and W. Hanlon and N. Hayashida and H. He and R. Hibi and K. Hibino and R. Higuchi and K. Honda and D. Ikeda and N. Inoue and T. Ishii and H. Ito and D. Ivanov and A. Iwasaki and H. M. Jeong and S. Jeong and C. C. H. Jui and K. Kadota and F. Kakimoto and O. Kalashev and K. Kasahara and S. Kasami and S. Kawakami and K. Kawata and I. Kharuk and E. Kido and H. B. Kim and J. H. Kim and J. H. Kim and S. W. Kim and Y. Kimura and I. Komae and V. Kuzmin and M. Kuznetsov and Y. J. Kwon and K. H. Lee and B. Lubsandorzhiev and J. P. Lundquist and H. Matsumiya and T. Matsuyama and J. N. Matthews and R. Mayta and K. Mizuno and M. Murakami and I. Myers and K. H. Lee and S. Nagataki and K. Nakai and T. Nakamura and E. Nishio and T. Nonaka and H. Oda and S. Ogio and M. Onishi and H. Ohoka and N. Okazaki and Y. Oku and T. Okuda and Y. Omura and M. Ono and A. Oshima and H. Oshima and S. Ozawa and I. H. Park and K. Y. Park and M. Potts and M. S. Pshirkov and J. Remington and D. C. Rodriguez and C. Rott and G. I. Rubtsov and D. Ryu and H. Sagawa and R. Saito and N. Sakaki and T. Sako and N. Sakurai and D. Sato and K. Sato and S. Sato and K. Sekino and P. D. Shah and N. Shibata and T. Shibata and J. Shikita and H. Shimodaira and B. K. Shin and H. S. Shin and D. Shinto and J. D. Smith and P. Sokolsky and B. T. Stokes and T. A. Stroman and Y. Takagi and K. Takahashi and M. Takamura and M. Takeda and R. Takeishi and A. Taketa and M. Takita and Y. Tameda and K. Tanaka and M. Tanaka and Y. Tanoue and S. B. Thomas and G. B. Thomson and P. Tinyakov and I. Tkachev and H. Tokuno and T. Tomida and S. Troitsky and R. Tsuda and Y. Tsunesada and S. Udo and F. Urban and D. Warren and T. Wong and K. Yamazaki and K. Yashiro and F. Yoshida and Y. Zhezher and Z. Zundel},
journal= {arXiv preprint arXiv:2406.19287},
year = {2024}
}
备注
8 pages, 3 figures, accepted for publication in PRL