Interplanetary Magnetic Flux Rope Observed at Ground Level by HAWC

Akiyama S, Alfaro R, Alvarez C, Angeles Camacho JR, Arteaga-Velazquez JC, Arunbabu KP, Avila Rojas D, Solares HAA, Belmont-Moreno E, Caballero-Mora KS, Capistran T, Carraminana A, Casanova S, Colin-Farias P, Cotti U, Cotzomi J, De La Fuente E, De Leon C, Hernandez RD, Espinoza C, Fraija N, Galvan-Gamez A, Garcia D, Garcia-Gonzalez JA, Garfias F, Gonzalez MM, Goodman JA, Harding JP, Hona B, Huang D, Hueyotl-Zahuantitla F, Huntemeyer P, Iriarte A, Joshi V, Kieda D, Kunde GJ, Lara A, Vargas HL, Luis-Raya G, Malone K, Martinez-Castro J, Matthews JA, Miranda-Romagnoli P, Moreno E, Nayerhoda A, Nellen L, Newbold M, Niembro T, Nieves-Chinchilla T, Noriega-Papaqui R, Perez-Perez EG, Preisser L, Rho CD, Ryan J, Salazar H, Salesa Greus F, Sandoval A, Springer RW, Torres I, Urena-Mena F, Villasenor L, Zepeda A (2020)

Publication Type: Journal article

Publication year: 2020

Journal

Book Volume: 905

Journal Issue: 1

DOI: 10.3847/1538-4357/abc344

Abstract

We report the ground-level detection of a Galactic cosmic-ray (GCR) flux enhancement lasting similar to 17 hr and associated with the passage of a magnetic flux rope (MFR) over the Earth. The MFR was associated with a slow coronal mass ejection (CME) caused by the eruption of a filament on 2016 October 9. Due to the quiet conditions during the eruption and the lack of interactions during the interplanetary CME transport to the Earth, the associated MFR preserved its configuration and reached the Earth with a strong magnetic field, low density, and a very low turbulence level compared to local background, thus generating the ideal conditions to redirect and guide GCRs (in the similar to 8-60 GV rigidity range) along the magnetic field of the MFR. An important negative B-Z component inside the MFR caused large disturbances in the geomagnetic field and a relatively strong geomagnetic storm. However, these disturbances are not the main factors behind the GCR enhancement. Instead, we found that the major factor was the alignment between the MFR axis and the asymptotic direction of the observer.

Authors with CRIS profile

Involved external institutions

Catholic University of America United States (USA) (US) National Autonomous University of Mexico / Universidad Nacional Autónoma de México (UNAM) Mexico (MX) Universidad Autónoma de Chiapas (UNACH) Mexico (MX) Universidad Michoacana de San Nicolás de Hidalgo (UMSNH) Mexico (MX) Pennsylvania State University (Penn State) United States (USA) (US) National Institute for Astrophysics / Istituto Nazionale Astrofisica (INAF) Italy (IT) Polska Akademia Nauk (PAN) / Polish Academy of Sciences Poland (PL) Benemérita Universidad Autónoma de Puebla (BUAP) / Meritorious Autonomous University of Puebla Mexico (MX) Universidad de Guadalajara (UDEG) Mexico (MX) University of Maryland United States (USA) (US) Los Alamos National Laboratory United States (USA) (US) Michigan Technological University United States (USA) (US) University of Utah United States (USA) (US) Universidad Politécnica de Pachuca (UPP) Mexico (MX) National Polytechnic Institute of Mexico / Instituto Politécnico Nacional de México Mexico (MX) Autonomous University of the State of Hidalgo / Universidad Autónoma del Estado de Hidalgo Mexico (MX) Smithsonian Astrophysical Observatory United States (USA) (US) National Aeronautics and Space Administration (NASA) United States (USA) (US) University of Seoul (UOS) / 서울시립대학교 Korea, Republic of (KR) University of New Hampshire United States (USA) (US)

How to cite

APA:

Akiyama, S., Alfaro, R., Alvarez, C., Angeles Camacho, J.R., Arteaga-Velazquez, J.C., Arunbabu, K.P.,... Zepeda, A. (2020). Interplanetary Magnetic Flux Rope Observed at Ground Level by HAWC. Astrophysical Journal, 905(1). https://doi.org/10.3847/1538-4357/abc344

MLA:

Akiyama, S., et al. "Interplanetary Magnetic Flux Rope Observed at Ground Level by HAWC." Astrophysical Journal 905.1 (2020).

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