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Interplanetary magnetic field properties and variability near Mercury’s orbit
dc.contributor.authorJames, Matthew K.
dc.contributor.authorImber, Suzanne M.
dc.contributor.authorBunce, Emma J.
dc.contributor.authorYeoman, Timothy K.
dc.contributor.authorLockwood, Mike
dc.contributor.authorOwens, Mathew J.
dc.contributor.authorSlavin, James A.
dc.date.accessioned2017-10-23T17:31:49Z
dc.date.available2018-10-02T19:49:01Zen
dc.date.issued2017-08
dc.identifier.citationJames, Matthew K.; Imber, Suzanne M.; Bunce, Emma J.; Yeoman, Timothy K.; Lockwood, Mike; Owens, Mathew J.; Slavin, James A. (2017). "Interplanetary magnetic field properties and variability near Mercury’s orbit." Journal of Geophysical Research: Space Physics 122(8): 7907-7924.
dc.identifier.issn2169-9380
dc.identifier.issn2169-9402
dc.identifier.urihttps://hdl.handle.net/2027.42/138915
dc.description.abstractThe first extensive study of interplanetary magnetic field (IMF) characteristics and stability at Mercury is undertaken using MErcury Surface, Space ENvironment, GEochemistry, and Ranging (MESSENGER) magnetometer data. Variations in IMF and solar wind conditions have a direct and rapid effect upon Mercury’s highly dynamic magnetosphere; hence, understanding of the time scales over which these variations occur is crucial because they determine the duration of magnetospheric states. We characterize typical distributions of IMF field strength, clock angle, and cone angle throughout the duration of MESSENGER’s mission. Clock and cone angle distributions collected during the first Earth year of the mission indicate that there was a significant north‐south asymmetry in the location of the heliospheric current sheet during this period. The stability of IMF magnitude, clock angle, cone angle, and IMF Bz polarity is quantified for the entire mission. Changes in IMF Bz polarity and magnitude are found to be less likely for higher initial field magnitudes. Stability in IMF conditions is also found to be higher at aphelion (heliocentric distance r ∼ 0.31 AU) than at perihelion (r ∼ 0.47 AU).Key PointsThe typical characteristics of the IMF at Mercury during the MESSENGER mission have been studiedThe time scales over which variations in the IMF at Mercury occur have been quantifiedIMF clock and cone angle distributions show long‐term variations related to an asymmetric reversal of the solar dipole
dc.publisherCambridge Univ. Press
dc.publisherWiley Periodicals, Inc.
dc.subject.otherMercury
dc.subject.otherIMF
dc.subject.otherMESSENGER
dc.subject.othersolar wind
dc.titleInterplanetary magnetic field properties and variability near Mercury’s orbit
dc.typeArticleen_US
dc.rights.robotsIndexNoFollow
dc.subject.hlbsecondlevelAstronomy and Astrophysics
dc.subject.hlbtoplevelScience
dc.description.peerreviewedPeer Reviewed
dc.description.bitstreamurlhttps://deepblue.lib.umich.edu/bitstream/2027.42/138915/1/jgra53735_am.pdf
dc.description.bitstreamurlhttps://deepblue.lib.umich.edu/bitstream/2027.42/138915/2/jgra53735-sup-0001-Text_SI-S01.pdf
dc.description.bitstreamurlhttps://deepblue.lib.umich.edu/bitstream/2027.42/138915/3/jgra53735.pdf
dc.identifier.doi10.1002/2017JA024435
dc.identifier.sourceJournal of Geophysical Research: Space Physics
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dc.owningcollnameInterdisciplinary and Peer-Reviewed


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