HR: 08:55h
AN: SH31B-04    [Abstracts]
TI: The Formation of Magnetic Decreases \(MDs\) in Interplanetary Space: Ulysses
AU: * Tsurutani, B
EM: bruce.tsurutani@jpl.nasa.gov
AF: Jet Propulsion Laboratory, 4800 Oak Grove Dr., Pasadena, 91109, United States
AU: Guarnieri, F
EM: guarnieri@univap.br
AF: UNIVAP, 2911 Av. Shishima Hifumi, Sao Jose dos Campos, 12244-000, Brazil
AU: Echer, E
EM: eecher@inpe.br
AF: INPE, 1758 Av. dos Astronautas, Sao Jose dos Campos, 1227-010, Brazil
AB: Magnetic Decreases are decreases in the magnitude of the ambient magnetic field. The displaced plasma pressure is supplanted by anisotropic \(Tperp/Tpar > 1\), locally heated plasma so that there is pressure balance across the MD structures. Anisotropic spatial distributions of MDs are identified to further understand the conditions under which MDs form/evolve. We will show that Ulysses fast-latitude scans through corotating solar wind streams are good places to search for such spatial anisotropies. The properties of MDs within CIRs and high speed streams will be reported. A general generation mechanism will be described.
DE: 2102 Corotating streams
DE: 2134 Interplanetary magnetic fields
DE: 2159 Plasma waves and turbulence
SC: SPA-Solar and Heliospheric Physics [SH]
MN: 2007 Fall Meeting