HAWC在地面观测到的行星际磁绳
太阳与恒星天体物理
2021-01-12 v1 高能天体物理现象
摘要
我们报道了一次持续约17小时的银河宇宙线(GCR)通量增强的地面探测，该增强与磁绳(MFR)掠过地球相关。该MFR与2016年10月9日一次暗条爆发引起的慢速日冕物质抛射(CME)相关。由于爆发期间环境宁静且行星际CME向地球传输过程中缺乏相互作用，相关MFR保持了其构型，并以强磁场、低密度和相较本地背景极低的湍流水平到达地球，从而产生了将GCR（刚性范围约8至60 GV）沿MFR磁场重定向并引导的理想条件。MFR内部重要的负分量引起地磁场的大扰动和相对强的地磁暴。然而，这些扰动并非GCR增强的主要因素。相反，我们发现主要因素是MFR轴与观测者渐近方向之间的对齐。
引用
@article{arxiv.2101.03243,
title = {Interplanetary magnetic flux rope observed at ground level by HAWC},
author = {S. Akiyama and R. Alfaro and C. Alvarez and J. R. Angeles Camacho and J. C. Arteaga-Velázquez and K. P. Arunbabu and D. Avila Rojas and H. A. Ayala Solares and E. Belmont-Moreno and K. S. Caballero-Mora and T. Capistrán and A. Carramiñana and S. Casanova and P. Colin-Farias and U. Cotti and J. Cotzomi and E. De la Fuente and C. de León and R. Diaz Hernandez and C. Espinoza and N. Fraija and A. Galván-Gámez and D. Garcia and J. A. García-González and F. Garfias and M. M. González and J. A. Goodman and J. P. Harding and B. Hona and D. Huang and F. Hueyotl-Zahuantitla and P. Huntemeyer and A. Iriarte and V. Joshi and D. Kieda and G. J. Kunde and A. Lara and H. León Vargas and G. Luis-Raya and K. Malone and J. Martínez-Castro and J. A. Matthews and P. Miranda-Romagnoli and E. Moreno and A. Nayerhoda and L. Nellen and M. Newbold and T. Niembro and T. Nieves-Chinchilla and R. Noriega-Papaqui and E. G. Pérez-Pérez and L. Preisser and C. D. Rho and J. Ryan and H. Salazar and F. Salesa Greus and A. Sandoval and R. W. Springer and I. Torres and F. Ureña-Mena and L. Villaseñor and A. Zepeda},
journal= {arXiv preprint arXiv:2101.03243},
year = {2021}
}