Plasma distribution in Mercury's magnetosphere derived from MESSENGER Magnetometer and Fast Imaging Plasma Spectrometer observations
dc.contributor.author | Korth, Haje | en_US |
dc.contributor.author | Anderson, Brian J. | en_US |
dc.contributor.author | Gershman, Daniel J. | en_US |
dc.contributor.author | Raines, Jim M. | en_US |
dc.contributor.author | Slavin, James A. | en_US |
dc.contributor.author | Zurbuchen, Thomas H. | en_US |
dc.contributor.author | Solomon, Sean C. | en_US |
dc.contributor.author | McNutt, Ralph L. | en_US |
dc.date.accessioned | 2014-05-23T15:58:58Z | |
dc.date.available | 2015-06-01T15:48:45Z | en_US |
dc.date.issued | 2014-04 | en_US |
dc.identifier.citation | Korth, Haje; Anderson, Brian J.; Gershman, Daniel J.; Raines, Jim M.; Slavin, James A.; Zurbuchen, Thomas H.; Solomon, Sean C.; McNutt, Ralph L. (2014). "Plasma distribution in Mercury's magnetosphere derived from MESSENGER Magnetometer and Fast Imaging Plasma Spectrometer observations." Journal of Geophysical Research: Space Physics 119(4): 2917-2932. | en_US |
dc.identifier.issn | 2169-9380 | en_US |
dc.identifier.issn | 2169-9402 | en_US |
dc.identifier.uri | https://hdl.handle.net/2027.42/106823 | |
dc.description.abstract | We assess the statistical spatial distribution of plasma in Mercury's magnetosphere from observations of magnetic pressure deficits and plasma characteristics by the MErcury Surface, Space ENvironment, GEochemistry, and Ranging (MESSENGER) spacecraft. The statistical distributions of proton flux and pressure were derived from 10 months of Fast Imaging Plasma Spectrometer (FIPS) observations obtained during the orbital phase of the MESSENGER mission. The Magnetometer‐derived pressure distributions compare favorably with those deduced from the FIPS observations at locations where depressions in the magnetic field associated with the presence of enhanced plasma pressures are discernible in the Magnetometer data. The magnitudes of the magnetic pressure deficit and the plasma pressure agree on average, although the two measures of plasma pressure may deviate for individual events by as much as a factor of ~3. The FIPS distributions provide better statistics in regions where the plasma is more tenuous and reveal an enhanced plasma population near the magnetopause flanks resulting from direct entry of magnetosheath plasma into the low‐latitude boundary layer of the magnetosphere. The plasma observations also exhibit a pronounced north‐south asymmetry on the nightside, with markedly lower fluxes at low altitudes in the northern hemisphere than at higher altitudes in the south on the same field line. This asymmetry is consistent with particle loss to the southern hemisphere surface during bounce motion in Mercury's offset dipole magnetic field. Key Points Agreement of Mercury plasma pressure from plasma and field observations Pressure enhancements observed near the planet and at the magnetopause flanks The pressure distributions show dawn‐dusk and north‐south asymmetries | en_US |
dc.publisher | Imperial College Press | en_US |
dc.publisher | Wiley Periodicals, Inc. | en_US |
dc.subject.other | Plasma Entry | en_US |
dc.subject.other | Magnetosphere | en_US |
dc.subject.other | Plasma Pressure | en_US |
dc.subject.other | MESSENGER | en_US |
dc.subject.other | Mercury | en_US |
dc.subject.other | Plasma Distribution | en_US |
dc.title | Plasma distribution in Mercury's magnetosphere derived from MESSENGER Magnetometer and Fast Imaging Plasma Spectrometer observations | en_US |
dc.type | Article | en_US |
dc.rights.robots | IndexNoFollow | en_US |
dc.subject.hlbsecondlevel | Astronomy and Astrophysics | en_US |
dc.subject.hlbtoplevel | Science | en_US |
dc.description.peerreviewed | Peer Reviewed | en_US |
dc.description.bitstreamurl | http://deepblue.lib.umich.edu/bitstream/2027.42/106823/1/jgra50930.pdf | |
dc.identifier.doi | 10.1002/2013JA019567 | en_US |
dc.identifier.source | Journal of Geophysical Research: Space Physics | en_US |
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dc.owningcollname | Interdisciplinary and Peer-Reviewed |
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