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| Titel |
Localized Energy Conversion within a Reconnection Diffusion Region |
| VerfasserIn |
James Burch, Roy Torbert, Robert Ergun, Amy Rager, Barbara Giles, James Webster, Kevin Genestreti, Robert Allen, Tai Phan, John Dorelli, Daniel Gershman, Li-Jen Chen, Olivier Le Contel, Christopher Russell, Robert Strangeway, Shan Wang, Frederick Wilder, Daniel Graham, Paul Cassak, Michael Hesse |
| Konferenz |
EGU General Assembly 2017
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 19 (2017) |
| Datensatznummer |
250142279
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| Publikation (Nr.) |
 EGU/EGU2017-5880.pdf |
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| Zusammenfassung |
| The four MMS spacecraft encountered an electron diffusion region near 13:07:02.2 UT on 16 Oct. 2015. Electron distribution functions with 30-ms cadence show non-gyrotropic distributions with predicted crescent-shaped peaks near the stagnation point on the magnetosphere side of the reconnection X-line. Breaking and reconnection of field lines is indicated by the transition of the crescent feature from perpendicular to parallel to the local magnetic field line with downward magnetosheath electrons and upward magnetospheric electrons populating open field lines. Multiple bipolar electric field pulses (possibly solitary waves) with magnitudes from 20 - 100 mV/m were observed in the L and M boundary normal coordinates by MMS2 and MMS3 along with a quasistatic positive normal electric field component. The strongest of these events, which resulted in significant J dot E dissipation and quenching of widespread magnetosonic waves at 30 - 40 Hz, occurred at the precise location of field-line breaking and reconnection. Weaker J dot E signatures were observed at some of the other events, suggesting the occurrence of multiple, or patchy energy conversion within the diffusion region. |
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