Computer Science
Scientific paper
Jun 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aipc..471..645g&link_type=abstract
The solar wind nine conference. AIP Conference Proceedings, Volume 471, pp. 645-648 (1999).
Computer Science
1
Magnetohydrodynamics And Plasmas
Scientific paper
Because coronal mass ejections (CMEs) are viewed in projection, it is difficult to determine their three-dimensional nature. We use an analytic model of CMEs as an example of a fully three-dimensional magnetic field structure in MHD force balance with an emerging CME. We present the CME magnetic field and its associated density structure, seen projected at the limb from two viewing angles perpendicular to the plane of the sky, and emerging from disk center representing ``earth-directed'' CME events. The range of CME structures thus produced compares well to existing CME white-light coronagraph and full disk EUV and X-ray observations. In particular, we find that both 3-part ``front-cavity-core'' and ``U-shaped'' white light CMEs, as well as the twin dimmings (also referred to as transient coronal holes) observed in X-ray and EUV, can successfully be reproduced by the CME model. All of these structures are a direct consequence of a single three-dimensional magnetic field topology, viewed from different directions.
Alexander David
Biesecker Doug
Fisher Richard Royal
Gibson Sarah Elizabeth
Guhathakurta Madhulika
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