ULYSSES observations of latitude gradients in the heliospheric magnetic field

Details ULYSSES observations of latitude gradients in the heliospheric magnetic field ULYSSES observations of latitude gradients in the heliospheric magnetic field

Aug 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995adspr..16..165s&link_type=abstract

Advances in Space Research (ISSN 0273-1177), vol. 16, no. 9, p. (9)165-(9)170

Computer Science

16

Heliosphere, Latitude, Solar Magnetic Field, Solar Rotation, Ulysses Mission, Current Sheets, Explorer 50 Satellite, Galactic Cosmic Rays, Magnetic Flux, Magnetohydrodynamic Waves, Solar Wind

Scientific paper

Several parameters measured by Ulysses as it traveled southward to heliographic latitudes of -50 deg are presented and analyzed. The radial component of the magnetic field, averaged over 5 deg latitude increments and extrapolated back to 1 AU, is found to agree with baseline measurements provided by IMP-8. There is little, if any, evidence of a latitude gradient, a result consistent with the dominance of the magnetic field associated with the heliospheric current sheet and with recent models which include the effect of the current sheet as well as of source surface fields. Thus far, the spiral angle agrees with the Parker spiral assuming a rate of rotation of the field lines at the Sun equal to the equatorial value. No evidence is seen of either a change in rotation rate with latitude or an unwinding of the spiral as suggested by a recent analysis. Hourly variances in the field magnitude and in the sum of the variances in the components, normalized to the square of the observed field strenght, show the former to be independent of latitude while the latter shows a strong increase with latitude. These two observations are shown to be associated with Alfven waves that are continuously present at high latitudes. The waves have large amplitudes, extend to long periods, and have important implications for galactic cosmic rays and the solar wind.

Affiliated with

Also associated with

No associations

Rating

ULYSSES observations of latitude gradients in the heliospheric magnetic field does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with ULYSSES observations of latitude gradients in the heliospheric magnetic field, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and ULYSSES observations of latitude gradients in the heliospheric magnetic field will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1267087