A view of the inner heliosphere during the May 10-11, 1999 low density anomaly

Details A view of the inner heliosphere during the May 10-11, 1999 low density anomaly A view of the inner heliosphere during the May 10-11, 1999 low density anomaly

Dec 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000georl..27.3765u&link_type=abstract

Geophysical Research Letters, Volume 27, Issue 23, p. 3765-3768

Physics

14

Interplanetary Physics: Interplanetary Magnetic Fields, Interplanetary Physics: Solar Cycle Variations, Interplanetary Physics: Solar Wind Plasma, Interplanetary Physics: Sources Of The Solar Wind

Scientific paper

On May 10 and 11, 1999, near-Earth spacecraft observed the solar wind density drop to below 0.1 particles cm-3. Using those data, we have mapped solar wind parameters back to the Sun from 1 AU using two techniques. The first assumed constant-velocity trajectories plus corotation, while the second employed MHD-derived magnetofluid parameters. This inverse tracing creates a view of the inner heliosphere useful for identifying the source location on the Sun of the density anomaly. We compare the two methods and show that the source location of the anomaly predicted by MHD is mapped ~20° eastward of the constant-velocity result. The coronal magnetic field maps indicate that the low density event occurred as the polar coronal magnetic field began reversing. We suggest that the event was initiated by a latitudinal excursion of the low velocity heliospheric current sheet toward the helioequator. The emergence of this slow flow into the preexisting faster wind produced strong rarefaction and anomalously low densities.

Affiliated with

Also associated with

No associations

Rating

A view of the inner heliosphere during the May 10-11, 1999 low density anomaly 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 A view of the inner heliosphere during the May 10-11, 1999 low density anomaly, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A view of the inner heliosphere during the May 10-11, 1999 low density anomaly will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1043292