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A Double Disturbed ...
A Double Disturbed Lunar Plasma Wake
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- Rasca, A.P. (author)
- NASA Goddard Space Flight Center, MD, Greenbelt, United States
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- Fatemi, Shahab (author)
- Umeå universitet,Institutionen för fysik
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- Farrell, W.M. (author)
- NASA Goddard Space Flight Center, MD, Greenbelt, United States
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- Poppe, A.R. (author)
- Space Sciences Laboratory, University of California, CA, Berkeley, United States; Solar System Exploration Research Virtual Institute, NASA Ames Research Center, CA, Moffett Field, United States
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- Zheng, Y. (author)
- NASA Goddard Space Flight Center, MD, Greenbelt, United States
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(creator_code:org_t)
- AGU, 2021
- 2021
- English.
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In: Journal of Geophysical Research - Space Physics. - : AGU. - 2169-9380 .- 2169-9402. ; 126:2
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- Under nominal solar wind conditions, a tenuous wake forms downstream of the lunar nightside. However, the lunar plasma environment undergoes a transformation as the Moon passes through the Earth's magnetotail, with hot subsonic plasma causing the wake structure to disappear. We investigate the lunar wake response during a passing coronal mass ejection (CME) on March 8, 2012 while crossing the Earth's magnetotail using both a magnetohydrodynamic (MHD) model of the terrestrial magnetosphere and a three-dimensional hybrid plasma model of the lunar wake. The CME arrives at 1 AU around 10:30 UT and its impact is first detected inside the geomagnetic tail after 11:10 UT by the Acceleration, Reconnection, Turbulence and Electrodynamics of the Moon's Interaction with the Sun (THEMIS-ARTEMIS) satellites in lunar orbit. A global magnetospheric MHD simulation using Wind data for upstream conditions with the OpenGGCM model reveals the magnetosheath compression to the lunar position from 11:20–12:00 UT, accompanied by multiple flux rope or plasmoid-like features developing and propagating tailward. MHD results support plasma changes observed by the THEMIS-ARTEMIS satellites. Lunar-scale simulations using the Amitis hybrid code show a short and misaligned plasma wake during the Moon's brief entry into the magnetosheath at 11:20 UT, with plasma expansion into the void being aided by the higher plasma temperatures. Sharply accelerated flow speed and a compressed magnetic field lead to an enhanced electric field in the lunar wake capable of generating sudden changes to the nightside near-surface electric potential.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
- NATURVETENSKAP -- Fysik -- Fusion, plasma och rymdfysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Fusion, Plasma and Space Physics (hsv//eng)
Keyword
- hybrid simulation
- Lunar wake
- magnetotail
- plasma
- solar storm
Publication and Content Type
- ref (subject category)
- art (subject category)
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