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Sakurai, R.

Publications and source records attributed to Sakurai, R..

10 records
All sourcesNASA NTRSDOE OSTI
NASA NTRS2000

Polar Cap Bondary Layer ELF/VLF Waves

We will demonstrate that these boundary layer waves are continuously present on auroral zone magnetic field lines at all local times. The wave intensities and latitudinal location dependences on interplanetary parameters have been statistically determined and will be discussed.

boundary layer waves geomagnetic↗
NASA NTRS1999

Microstructures in the Polar Solar Wind: Ulysses

We find that small (10-200 rP) magnetic decreases comprise a dominant part of the polar solar wind microstructure at Ulysses distances (2.2 AU). These magnetic field dips are almost always bounded by tangential discontinuities, a feature which is not well understood at this time. Hundreds of these events have been examined in detail and a variety of types have been found. These will be described. It is speculated that these structures have been generated by perpendicular heating of ions closer to the Sun and have then been convected to distances of Ulysses. Such structures may be very important for the rapid cross- field diffusion of ions in the polar regions of the heliosphere.

Tsuruyani, Bruce T.↗
NASA NTRS1996

(abstract) An Extensive Search for Interplanetary Slow-mode Shocks: Ulysses

Ulysses has accumulated five years of interplanetary solar wind plasma and IMF measurements. These data cover from 1 to approximately 5 AU and all the heliographic latitudes. Based on these data, we perform an extensive search for the slow-mode shocks. We find a considerable number of discontinuities that have large magnetic field magnitude changes and also large field normal components.

slow-mode shocks plasma solar wind Ulysses magneti↗
NASA NTRS1996

Interplanetary Discontinuities in Corotating Streams and Their Interaction Regions

In this study, we investigate the discontinuity properties in the low altitude corotating stream regions which are encountered during Ulyssses traveling from the south to north heliographic poles in 1995. Through the occurrence rates of directional discontinuites and tangential discontinuities, we find that there are three different regions around a high speed stream.

RDs TDs coronal mass ejections↗
NASA NTRS1996

Arc-Polarized, Nonlinear Alfven Waves and Rotational Discontinuities: Directions of Propogation?

Large amplitude, noncompressive Alfven waves and rotational discontinuities are shown to be arc-polarized. The slowly rotating Alfven wave portion plus the fast rotating discontinuity comprise 360(deg) in phase rotation. The magnetic field vector perturbation lies in a plane. There are two (or more) possible interpretations to the observations.

Alfven waves rotational discontinuities arc-polari↗