| タイトル | Current Sheet Evolution in the Aftermath of a CME Event |
| 著者（英） | Schwadron, N. A.; Poletto, G.; Suess, S. T.; Ko, Y.-K.; Raymond, J. C.; Bemporad, A.; Elliott, H. A. |
| 著者所属（英） | NASA Marshall Space Flight Center |
| 発行日 | 2005-01-01 |
| 言語 | eng |
| 内容記述 | We report on SOHO-UVCS observations of the coronal restructuring following a Coronal Mass Ejection (CME) on November 26,2002, at the time of a SOHO-Ulysses quadrature campaign. Starting about 3 hours after a CME in the NW quadrant, UVCS began taking spectra at 1.7 solar radius, covering emission from both cool and hot plasma. Observations continued, with occasional gaps, for more than 2 days. Emission in the 974.8 Angstrom line of [Fe XVIII], indicating temperatures above 6 x 10(exp 6) K, was observed throughout the campaign in a spatially limited location. Comparison with EIT images shows the Fe XVIII emission to overlie a growing post-flare loop system formed in the aftermath of the CME. The emission most likely originates in a current sheet overlying the arcade. Analysis of the [Fe XVIII] emission allows us to infer the evolution of physical parameters in the current sheet over the entire span of our observations: in particular, we give the temperature vs. time in the current sheet and estimate the density. At the time of the quadrature, Ulysses was directly above the location of the CME and intercepted the ejecta. High ionization state Fe was detected by Ulysses-SWICS throughout the magnetic cloud associated with the CME. Both the remote and in situ observations are compared with predictions of theoretical CME models. |
| NASA分類 | Solar Physics |
| 権利 | Copyright |
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