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Global Hall MHD Simulations of Mercury’s Magnetopause Dynamics and FTEs Under Different Solar Wind and IMF Conditions
dc.contributor.authorLi, Changkun
dc.contributor.authorJia, Xianzhe
dc.contributor.authorChen, Yuxi
dc.contributor.authorToth, Gabor
dc.contributor.authorZhou, Hongyang
dc.contributor.authorSlavin, James A.
dc.contributor.authorSun, Weijie
dc.contributor.authorPoh, Gangkai
dc.date.accessioned2023-06-01T20:50:31Z
dc.date.available2024-06-01 16:50:21en
dc.date.available2023-06-01T20:50:31Z
dc.date.issued2023-05
dc.identifier.citationLi, Changkun; Jia, Xianzhe; Chen, Yuxi; Toth, Gabor; Zhou, Hongyang; Slavin, James A.; Sun, Weijie; Poh, Gangkai (2023). "Global Hall MHD Simulations of Mercury’s Magnetopause Dynamics and FTEs Under Different Solar Wind and IMF Conditions." Journal of Geophysical Research: Space Physics 128(5): n/a-n/a.
dc.identifier.issn2169-9380
dc.identifier.issn2169-9402
dc.identifier.urihttps://hdl.handle.net/2027.42/176861
dc.description.abstractMercury possesses a miniature but dynamic magnetosphere driven primarily by the solar wind through magnetic reconnection. A prominent feature of the dayside magnetopause reconnection that has been frequently observed is flux transfer events (FTEs), which are thought to be an important player in driving the global convection at Mercury. Using the BATSRUS Hall magnetohydrodynamics model with coupled planetary interior, we have conducted a series of global simulations to investigate the generation and characteristics of FTEs under different solar wind Alfvénic Mach numbers (MA) and interplanetary magnetic field (IMF) orientations. An automated algorithm was also developed to consistently identify FTEs and extract their key properties from the simulations. In all simulations driven by steady upstream conditions, FTEs are formed quasi-periodically with recurrence time ranging from 2 to 9 s, and their characteristics vary in time as they evolve and interact with the surrounding plasma and magnetic field. Our statistical analysis of the simulated FTEs reveals that the key properties of FTEs, including spatial size, traveling speed and core field strength, all exhibit notable dependence on the solar wind MA and IMF orientation, and the trends identified from the simulations are generally consistent with previous MErcury Surface Space ENvironment, GEochemistry, and Ranging observations. It is also found that FTEs formed in the simulations contribute about 3%–13% of the total open flux created at the dayside magnetopause that participates in the global circulation, suggesting that FTEs indeed play an important role in driving the Dungey cycle at Mercury.Key Points3D global Hall magnetohydrodynamics simulations and an automated identification algorithm are developed to study flux transfer event formation and associated dynamics at MercuryProperties of simulated FTEs agree well with MErcury Surface Space ENvironment, GEochemistry, and Ranging (MESSENGER) observations and exhibit clear dependence on solar wind MA and interplanetary magnetic field orientationFTEs make a significant contribution to the open flux generation in Mercury’s magnetosphere, consistent with previous MESSENGER findings
dc.publisherCentrum voor Wiskunde en Informatica Amsterdam
dc.publisherWiley Periodicals, Inc.
dc.subject.othersimulation
dc.subject.otherHall MHD
dc.subject.otherflux transfer event
dc.subject.otherMercury
dc.subject.otherreconnection
dc.subject.othermagnetosphere
dc.titleGlobal Hall MHD Simulations of Mercury’s Magnetopause Dynamics and FTEs Under Different Solar Wind and IMF Conditions
dc.typeArticle
dc.rights.robotsIndexNoFollow
dc.subject.hlbsecondlevelAstronomy and Astrophysics
dc.subject.hlbtoplevelScience
dc.description.peerreviewedPeer Reviewed
dc.description.bitstreamurlhttp://deepblue.lib.umich.edu/bitstream/2027.42/176861/1/jgra57788.pdf
dc.description.bitstreamurlhttp://deepblue.lib.umich.edu/bitstream/2027.42/176861/2/jgra57788_am.pdf
dc.identifier.doi10.1029/2022JA031206
dc.identifier.sourceJournal of Geophysical Research: Space Physics
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dc.owningcollnameInterdisciplinary and Peer-Reviewed


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