Cyclic reformation of a quasi‐parallel bow shock at Mercury: MESSENGER observations
dc.contributor.author | Sundberg, Torbjörn | en_US |
dc.contributor.author | Boardsen, Scott A. | en_US |
dc.contributor.author | Slavin, James A. | en_US |
dc.contributor.author | Uritsky, Vadim M. | en_US |
dc.contributor.author | Anderson, Brian J. | en_US |
dc.contributor.author | Korth, Haje | en_US |
dc.contributor.author | Gershman, Daniel J. | en_US |
dc.contributor.author | Raines, Jim M. | en_US |
dc.contributor.author | Zurbuchen, Thomas H. | en_US |
dc.contributor.author | Solomon, Sean C. | en_US |
dc.date.accessioned | 2013-12-04T18:57:04Z | |
dc.date.available | 2014-12-01T17:22:18Z | en_US |
dc.date.issued | 2013-10 | en_US |
dc.identifier.citation | Sundberg, Torbjörn ; Boardsen, Scott A.; Slavin, James A.; Uritsky, Vadim M.; Anderson, Brian J.; Korth, Haje; Gershman, Daniel J.; Raines, Jim M.; Zurbuchen, Thomas H.; Solomon, Sean C. (2013). "Cyclic reformation of a quasiâ parallel bow shock at Mercury: MESSENGER observations." Journal of Geophysical Research: Space Physics 118(10): 6457-6464. | en_US |
dc.identifier.issn | 2169-9380 | en_US |
dc.identifier.issn | 2169-9402 | en_US |
dc.identifier.uri | https://hdl.handle.net/2027.42/101787 | |
dc.description.abstract | We here document with magnetic field observations a passage of the MErcury Surface, Space ENvironment, GEochemistry, and Ranging (MESSENGER) spacecraft through Mercury's magnetosphere under conditions of a quasi‐parallel bow shock, i.e., when the direction of the upstream interplanetary magnetic field was within 45° of the bow shock normal. The spacecraft's fast transition of the magnetosheath and the steady solar wind conditions during the period analyzed allow both spatial and temporal properties of the shock crossing to be investigated. The observations show that the shock reformation process can be nearly periodic under stable solar wind conditions. Throughout the 25‐min‐long observation period, the pulsation duration deviated by at most ~10% from the average 10 s period measured. This quasiperiodicity allows us to study all aspects of the shock reconfiguration, including ultra‐low‐frequency waves in the upstream region and large‐amplitude magnetic structures observed in the vicinity of the magnetosheath‐solar wind transition region and inside the magnetosheath. We also show that bow shock reformation can be a substantial source of wave activity in the magnetosphere, on this occasion having given rise to oscillations in the magnetic field with peak‐to‐peak amplitudes of 40–50 nT over large parts of the dayside magnetosphere. The clean and cyclic behavior observed throughout the magnetosphere, the magnetosheath, and the upstream region indicates that the subsolar region was primarily influenced by a cyclic reformation of the shock front, rather than by a spatial and temporal patchwork of short large‐amplitude magnetic structures, as is generally the case at the terrestrial bow shock under quasi‐parallel conditions. Key Points We document the behavior of a quasi‐parallel bow shock at Mercury Reformation of the bow shock can be nearly periodic The bow shock reformation leads to wave activity in the magnetosphere | en_US |
dc.publisher | Wiley Periodicals, Inc. | en_US |
dc.subject.other | Bow Shock | en_US |
dc.subject.other | Mercury | en_US |
dc.subject.other | MESSENGER | en_US |
dc.title | Cyclic reformation of a quasi‐parallel bow shock at Mercury: MESSENGER 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/2027.42/101787/1/jgra50602.pdf | |
dc.identifier.doi | 10.1002/jgra.50602 | 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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