A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä
Magnetohydrodynamic With Embedded Particle-In-Cell Simulation of the Geospace Environment Modeling Dayside Kinetic Processes Challenge Event
Tekijät: Chen Yuxi, Tóth Gábor, Hietala Heli, Vines Sarah K, Zou Ying, Nishimura Yukitoshi, Silveira Marcos V D, Guo Zhifang, Lin Yu, Markidis Stefano
Kustantaja: AMER GEOPHYSICAL UNION
Julkaisuvuosi: 2020
Journal: Earth and Space Science
Tietokannassa oleva lehden nimi: EARTH AND SPACE SCIENCE
Lehden akronyymi: EARTH SPACE SCI
Artikkelin numero: ARTN e2020EA001331
Vuosikerta: 7
Numero: 11
Sivujen määrä: 15
eISSN: 2333-5084
DOI: https://doi.org/10.1029/2020EA001331
Verkko-osoite: https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2020EA001331
Rinnakkaistallenteen osoite: https://research.utu.fi/converis/portal/detail/Publication/51317580
We use the magnetohydrodynamic (MHD) with embedded particle-in-cell model (MHD-EPIC) to study the Geospace Environment Modeling (GEM) dayside kinetic processes challenge event at 01:50-03:00 UT on 18 November 2015, when the magnetosphere was driven by a steady southward interplanetary magnetic field (IMF). In the MHD-EPIC simulation, the dayside magnetopause is covered by a PIC code so that the dayside reconnection is properly handled. We compare the magnetic fields and the plasma profiles of the magnetopause crossing with the MMS3 spacecraft observations. Most variables match the observations well in the magnetosphere, in the magnetosheath, and also during the current sheet crossing. The MHD-EPIC simulation produces flux ropes, and we demonstrate that some magnetic field and plasma features observed by the MMS3 spacecraft can be reproduced by a flux rope crossing event. We use an algorithm to automatically identify the reconnection sites from the simulation results. It turns out that there are usually multiple X-lines at the magnetopause. By tracing the locations of the X-lines, we find that the typical moving speed of the X-line endpoints is about 70 km/s, which is higher than but still comparable with the ground-based observations.
Ladattava julkaisu This is an electronic reprint of the original article. |  |
