Other
Scientific paper
May 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agusmsh22d..01o&link_type=abstract
American Geophysical Union, Spring Meeting 2002, abstract #SH22D-01
Other
7513 Coronal Mass Ejections, 7524 Magnetic Fields
Scientific paper
The recently formulated multi-tube model for a magnetic cloud is based on exact MHD bounded state solutions [Osherovich, Fainberg and Stone, 1999] which describe magnetically interacting helices embedded in a cylindrical flux rope. We present March 4-7, 1998 Wind observations of a magnetic cloud which illustrate the model. The log-log plot of electron temperature Te versus density Ne shows two straight lines with negative slopes suggesting that the polytropic indices for the 2 tubes are below unity (γ e < 1). Similar results were obtained from Ulysses observations at 5.4 AU for the same cloud and for another cloud observed on June 10-13, 1993 by Ulysses [Fainberg et al., 1996]. The boundary between the two tubes in this cloud is marked by a significant increase in the density and abnormal rotation of B. Such a divider, being a magnetic separatrix, is formed by proton dominated Maxwellian plasma whereas inside the two tubes, the main contribution to the total gas pressure comes from a non-Maxwellian electron component. References: Fainberg, J. et al., Proc. Solar Wind 8 Conference, Dana Point, CA., eds. D. Winterhalter, J.T. Gosling, S.R. Habbal, W.S. Kurth and M. Neugebauer, 554, 1996. Osherovich, V.A., J. Fainberg and R.G. Stone, Geophys. Res. L., 26(3), 401, 1999.
Fainberg Joe
Fitzenreiter Richard
Osherovich Vladimir A.
Viñas Adolfo F.
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