On the Solar Origins of Open Magnetic Fields in the Heliosphere

Details On the Solar Origins of Open Magnetic Fields in the Heliosphere On the Solar Origins of Open Magnetic Fields in the Heliosphere

Nov 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008apj...687..635r&link_type=abstract

The Astrophysical Journal, Volume 687, Issue 1, pp. 635-645.

Astronomy and Astrophysics

Astronomy

10

Sun: Solar-Terrestrial Relations, Sun: Solar Wind, Sun: Corona, Sun: Magnetic Fields, Sun: Particle Emission

Scientific paper

A combination of heliospheric and solar data was used to identify open magnetic fields stretching from the lower corona to Earth orbit. 35 near-relativistic electron beams detected at the ACE spacecraft ``labeled'' the heliospheric segments of the open fields. An X-ray flare occurred <20 minutes before injection of the electrons in 25 events. These flares labeled the solar segment of the open fields. The flares occurred in western-hemisphere active regions (ARs) with coronal holes whose polarity agreed with the polarity of the beam-carrying interplanetary fields in 23 of the 25 events. We conclude that electron beams reach 1 AU from open AR fields adjacent to flare sites. The Wang & Sheeley implementation of the potential-field source-surface model successfully identified the open fields in 36% of cases. Success meant that the open fields reached the source surface within 3 heliographic deg of the interplanetary magnetic field connected to ACE at 1 AU. Inclusion of five near misses improves the success rate to 56%. The success rate for the Schrijver & De Rosa PFSS implementation was 50%. Our results suggest that, even if the input magnetic data are updated frequently, the PFSS models succeed in only ~50% of cases to identify the coronal segment of open fields. Development of other techniques is in its infancy.

Affiliated with

Also associated with

No associations

Rating

On the Solar Origins of Open Magnetic Fields in the Heliosphere 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 On the Solar Origins of Open Magnetic Fields in the Heliosphere, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and On the Solar Origins of Open Magnetic Fields in the Heliosphere will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1842139