منابع مشابه
Signatures of the Cusp and Flux Transfer Events
The usual interpretation of a flux transfer event (FTE) at the magnetopause, in terms of time-dependent and possibly patchy reconnection, demands that it generate an ionospheric signature. Recent ground-based observations have revealed that auroral transients in the cusp/cleft region have all the characteristics required of FTE effects. However, signatures in the major available dataset, namely...
متن کاملIonospheric Ion Upwelling in the Wake of Flux Transfer Events at the Dayside Magnetopause
The effects of flux transfer events (FTE) on the dayside auroral ionosphere are studied, using a simple twin-vortex model of induced ionospheric plasma flow. It is shown that the predicted and observed velocities of these flows are sufficient to drive nonthermal plasma in the F region, not only within the newly opened flux tube of the FTE, but also on the closed, or "old" open, field lines arou...
متن کاملOn the Quasi-Periodic Nature of Magnetopause Flux Transfer Events
The recurrence rate of flux transfer events (FTEs) observed near the dayside magnetopause is discussed. A survey of magnetopause observations by the ISEE satellites hows that the distribution of the intervals between FTE signatures has a mode value of 3 min, but is highly skewed, having upper and lower decile values of 1.5 min and 18.5 min, respectively. The mean value is found to be 8 min, con...
متن کاملFlux Transfer Events at the Dayside Magnetopause: Transient Reconnection or Magnetosheath Dynamic Pressure Pulses?
The suggestion isdiscussed that characteristic particle and field signatures at the dayside magnetopause, termed "flux transfer events" (FTEs), are, in at least some cases, due to transient solar wind and/or magnetosheath dynamic pressure increases, rather than timedependent magnetic reconnection. It is found that most individual cases of FTEs observed by a single spacecraft can, at least quali...
متن کاملThe UV aurora and ionospheric flows during flux transfer events
Far Ultra Violet (FUV) signatures in the polar ionosphere during a period of magnetopause reconnection are compared with ionospheric flows measured in the cusp ‘throat’ and dusk cell by the CUTLASS Hankasalmi HF radar. Regions of peak FUV emission in the 130.4 nm and 135.6 nm range, observed by the Polar spacecraft’s VIS Earth Camera, consistently lie at the turning point of the flows from the ...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2020
ISSN: 2041-8213
DOI: 10.3847/2041-8213/ab8566