Interplanetary planar magnetic structures associated with expanding active regions

Details Interplanetary planar magnetic structures associated with expanding active regions Interplanetary planar magnetic structures associated with expanding active regions

Jun 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995sowi.conf...48n&link_type=abstract

Tohoku Inst. of Tech., International Solar Wind 8 Conference, p. 48

Other

Interplanetary Magnetic Fields, Magnetic Field Configurations, Solar Wind, Planar Structures, X Ray Telescopes, Coronas, Solar Flares, Solar Prominences, Sun

Scientific paper

Planar magnetic structures are interplanetary objects whose magnetic field cannot be explained by Parker's solar wind model. They are characterized by two-dimensional structure of magnetic field that are highly variable and parallel to a plane which is inclined to the ecliptic plane. They appeared independently of interplanetary compression, solar flares, active prominences nor filament disappearances, but the sources often coincided with active regions. On the other hand, it has been discovered by the Yohkoh Soft X-ray telescope that active-region corona expand outwards at speeds of a few to a few tens of km/s near the Sun. The expansions occurred repeatedly, almost continually, even in the absence of any sizable flares. In the Yohkoh Soft X-ray images, the active-region corona seems to expand out into interplanetary space. Solar sources of interplanetary planar magnetic structures observed by Sakigake were examined by Yohkoh soft X-ray telescope. During a quiet period of the Sun from January 6 to November 11, 1993, there found 5 planar magnetic structures according to the criteria (absolute value of Bn)/(absolute value of B) less than 0.1 for planarity and (dB)/(absolute value of B) greater than 0.7 for variability of magnetic field, where Bn, dB, and the absolute value of B are field component normal to a plane, standard deviation, and average of the magnitude of the magnetic field, respectively. Sources of 4 events were on low-latitude (less than 5 degrees) active regions from which loop-like structures were expanding. The coincidence, 80%, is extremely high with respect to accidental coincidence, 7%, of Sakigake windows of solar wind observation with active regions. The last source was on loop-like features which seemed to be related with a mid-latitude (20 degrees) active region.

Affiliated with

Also associated with

No associations

Rating

Interplanetary planar magnetic structures associated with expanding active regions 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 Interplanetary planar magnetic structures associated with expanding active regions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Interplanetary planar magnetic structures associated with expanding active regions will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-759873