MAVEN observations of magnetic flux ropes with a strong field amplitude in the Martian magnetosheath during the ICME passage on 8 March 2015
Abstract We present initial results of strong field amplitude flux ropes observed by Mars Atmosphere and Volatile EvolutioN (MAVEN) mission around Mars during the interplanetary coronal mass ejection (ICME) passage on 8 March 2015. The observed durations were shorter than 5 s and the magnetic field...
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| Format: | Article |
| Language: | English |
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Wiley
2016-05-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1002/2016GL068960 |
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| author | Takuya Hara Janet G. Luhmann Jasper S. Halekas Jared R. Espley Kanako Seki David A. Brain Hiroshi Hasegawa James P. McFadden David L. Mitchell Christian Mazelle Yuki Harada Roberto Livi Gina A. DiBraccio John E. P. Connerney Lailla Andersson Bruce M. Jakosky |
| author_facet | Takuya Hara Janet G. Luhmann Jasper S. Halekas Jared R. Espley Kanako Seki David A. Brain Hiroshi Hasegawa James P. McFadden David L. Mitchell Christian Mazelle Yuki Harada Roberto Livi Gina A. DiBraccio John E. P. Connerney Lailla Andersson Bruce M. Jakosky |
| author_sort | Takuya Hara |
| collection | DOAJ |
| description | Abstract We present initial results of strong field amplitude flux ropes observed by Mars Atmosphere and Volatile EvolutioN (MAVEN) mission around Mars during the interplanetary coronal mass ejection (ICME) passage on 8 March 2015. The observed durations were shorter than 5 s and the magnetic field magnitudes peaked above 80 nT, which is a few times stronger than those usually seen in the magnetosheath barrier. These are the first unique observations that MAVEN detected such flux ropes with a strong field at high altitudes (>5000 km). Across these structures, MAVEN coincidentally measured planetary heavy ions with energies higher than a few keV. The spatial properties inferred from the Grad‐Shafranov equation suggest that the speed of the structure can be estimated at least an order of magnitude faster than those previously reported quiet‐time counterparts. Hence, the space weather event like the ICME passage can be responsible for generating the observed strong field, fast‐traveling flux ropes. |
| format | Article |
| id | doaj-art-bebf4795314e44d9ab6d1c1e1fd1c8c2 |
| institution | DOAJ |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2016-05-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-bebf4795314e44d9ab6d1c1e1fd1c8c22025-08-20T03:10:24ZengWileyGeophysical Research Letters0094-82761944-80072016-05-0143104816482410.1002/2016GL068960MAVEN observations of magnetic flux ropes with a strong field amplitude in the Martian magnetosheath during the ICME passage on 8 March 2015Takuya Hara0Janet G. Luhmann1Jasper S. Halekas2Jared R. Espley3Kanako Seki4David A. Brain5Hiroshi Hasegawa6James P. McFadden7David L. Mitchell8Christian Mazelle9Yuki Harada10Roberto Livi11Gina A. DiBraccio12John E. P. Connerney13Lailla Andersson14Bruce M. Jakosky15Space Sciences Laboratory University of California Berkeley California USASpace Sciences Laboratory University of California Berkeley California USADepartment of Physics and Astronomy University of Iowa Iowa City Iowa USANASA Goddard Space Flight Center Greenbelt Maryland USADepartment of Earth and Planetary Science, Graduate School of Science University of Tokyo Tokyo JapanLaboratory for Atmospheric and Space Physics University of Colorado Boulder Boulder Colorado USAInstitute of Space and Astronautical Science Japan Aerospace Exploration Agency Sagamihara JapanSpace Sciences Laboratory University of California Berkeley California USASpace Sciences Laboratory University of California Berkeley California USACNRS, Institut de Recherche en Astrophysique et Planétologie Toulouse FranceSpace Sciences Laboratory University of California Berkeley California USASpace Sciences Laboratory University of California Berkeley California USANASA Goddard Space Flight Center Greenbelt Maryland USANASA Goddard Space Flight Center Greenbelt Maryland USALaboratory for Atmospheric and Space Physics University of Colorado Boulder Boulder Colorado USALaboratory for Atmospheric and Space Physics University of Colorado Boulder Boulder Colorado USAAbstract We present initial results of strong field amplitude flux ropes observed by Mars Atmosphere and Volatile EvolutioN (MAVEN) mission around Mars during the interplanetary coronal mass ejection (ICME) passage on 8 March 2015. The observed durations were shorter than 5 s and the magnetic field magnitudes peaked above 80 nT, which is a few times stronger than those usually seen in the magnetosheath barrier. These are the first unique observations that MAVEN detected such flux ropes with a strong field at high altitudes (>5000 km). Across these structures, MAVEN coincidentally measured planetary heavy ions with energies higher than a few keV. The spatial properties inferred from the Grad‐Shafranov equation suggest that the speed of the structure can be estimated at least an order of magnitude faster than those previously reported quiet‐time counterparts. Hence, the space weather event like the ICME passage can be responsible for generating the observed strong field, fast‐traveling flux ropes.https://doi.org/10.1002/2016GL068960MarsMAVENflux ropeICMEion escape |
| spellingShingle | Takuya Hara Janet G. Luhmann Jasper S. Halekas Jared R. Espley Kanako Seki David A. Brain Hiroshi Hasegawa James P. McFadden David L. Mitchell Christian Mazelle Yuki Harada Roberto Livi Gina A. DiBraccio John E. P. Connerney Lailla Andersson Bruce M. Jakosky MAVEN observations of magnetic flux ropes with a strong field amplitude in the Martian magnetosheath during the ICME passage on 8 March 2015 Geophysical Research Letters Mars MAVEN flux rope ICME ion escape |
| title | MAVEN observations of magnetic flux ropes with a strong field amplitude in the Martian magnetosheath during the ICME passage on 8 March 2015 |
| title_full | MAVEN observations of magnetic flux ropes with a strong field amplitude in the Martian magnetosheath during the ICME passage on 8 March 2015 |
| title_fullStr | MAVEN observations of magnetic flux ropes with a strong field amplitude in the Martian magnetosheath during the ICME passage on 8 March 2015 |
| title_full_unstemmed | MAVEN observations of magnetic flux ropes with a strong field amplitude in the Martian magnetosheath during the ICME passage on 8 March 2015 |
| title_short | MAVEN observations of magnetic flux ropes with a strong field amplitude in the Martian magnetosheath during the ICME passage on 8 March 2015 |
| title_sort | maven observations of magnetic flux ropes with a strong field amplitude in the martian magnetosheath during the icme passage on 8 march 2015 |
| topic | Mars MAVEN flux rope ICME ion escape |
| url | https://doi.org/10.1002/2016GL068960 |
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