2020 ARTEMIS SCIENCE NUGGETS
SUMMARIES OF ARTEMIS RESEARCH
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Suiyan Fu and Duo Zhao, January 2020Coupling of Ion and Electron Waves in the Distant Magnetotail
Wave coupling between whistler mode waves and ion-scale waves was detected by ARTEMIS spacecraft in the distant magnetotail. The coupling processes and wave generation mechanisms are shown in detail. Read more.
Chih-Ping Wang, March 2020Simultaneous ARTEMIS Two-Point Observation of Earthward and Tailward Reconnection Exhaust Flows in the Earth's Midtail
Fast earthward and tailward flows were observed simultaneously by the two ARTEMIS satellites within the midtail current sheet. The observed fast flows being the reconnection exhaust are supported by the flows on the two sides of the x line carrying opposite magnetic fluxes (northward for the earthward flow and southward for the tailward flow), satisfactory test of the Walén relation for the fast flow speeds, and qualitative/quantitative agreements between the observations and a large‐scale 2‐D PIC simulation of magnetic reconnection in several key reconnection signatures, including the reconnection rates, Hall fields, counterstreaming electrons, and plasma heating. Read more.
Stephanie Howard, May 2020Solar wind and interplanetary magnetic field influence on ultralow frequency waves and reflected ions near the Moon
We use ARTEMIS data to look for simultaneous observations of reflected ions and ultra low frequency waves to study the characteristics of waves generated through a resonant interaction with the reflected ions. The ambient plasma conditions during the observations is also studied, revealing that these waves are more likely to be observed under certain conditions. Read more.
San Lu, May 2020Energetic Electron Acceleration by Ion-scale Magnetic Islands in Turbulent Magnetic Reconnection
ARTEMIS spacecraft observations of turbulent reconnection outflows in Earth's magnetotail reveal that peaks in the energetic electron energy flux are well correlated with bipolar signatures of reconnected magnetic field, which are indicative of ion-scale magnetic islands, providing observational evidence for this acceleration process. Read more.
Kyoung-Joo Hwang, May 2020Sequential observations of flux transfer events, poleward-moving auroral forms, and polar cap patches
Using ARTEMIS and conjunctions of multiple space and ground observatories, we investigate ionospheric poleward-moving auroral forms and magnetic reconnection to elucidate their role solar wind-ionosphere coupling. Read more.
Xin Cao, May 2020The Acceleration of Lunar Ions by Magnetic Forces in the Terrestrial Magnetotail Lobes
Determining what forces govern lunar ion motion is important in understanding their interaction with the ambient plasma in the unique environment of the magnetotail. Based on a detailed analysis of two individual ARTEMIS observations, we find that magnetic pressure and magnetic tension forces may play an important role in accelerating the lunar ions. Read more.
Qing-He Zhang, July 2020Multiple transpolar auroral arcs reveal insight about coupling processes in the Earth's magnetotail
The causes of transpolar auroral arcs (TPA) have been debated for decades. This study identified a new and general mechanism for the formation of multiple TPAs, by using the comprehensive observations from DMSP satellite in the ionosphere, ARTEMIS satellite in the distant magnetotail, all sky imager at Chinese Zhongshan station, and comparing with a high-resolution 3D global MHD simulation. Read more.
Please send comments/suggestions to
Emmanuel Masongsong / emasongsong@igpp.ucla.edu