Evolution of magnetic fields and mass flow in a decaying active region

Details Evolution of magnetic fields and mass flow in a decaying active region Evolution of magnetic fields and mass flow in a decaying active region

Aug 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992soph..140..307z&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 140, no. 2, Aug. 1992, p. 307-316. Research supported by Chinese Academy of Sciences and NN

Physics

15

Mass Flow, Solar Activity, Solar Magnetic Field, Solar Observatories, Sunspots, Chromosphere, Doppler Effect, Photosphere, Red Shift

Scientific paper

Five days of coordinated observation were carried out from 24-29 September, 1987 at Big Bear and Huairou Solar Observatories. Longitudinal magnetic fields of an alpha(p) sunspot active region were observed almost continuously by the two observatories. In addition, vector magnetic fields, photospheric and chromospheric Doppler velocity fields of the active region were also observed at Huairou Solar Observatory. The evolution of magnetic fields and mass motions of the active region is studied. There are two kinds of moving magnetic features (MMFs). MMFs with the same magnetic polarity as the center sunspot carry net flux from the spot, move through the moat, and accumulate at the moat's outer boundary. MMFs in pairs of mixed polarity are not responsible for the decay of the spot since they do not carry away the net flux. The speed of the mixed polarity MMFs is larger than the outflow measured by photospheric Dopplergrams. The unipolar MMFs are moving at about the same speed as the Doppler outflow.

Affiliated with

Also associated with

No associations

Rating

Evolution of magnetic fields and mass flow in a decaying active region 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 Evolution of magnetic fields and mass flow in a decaying active region, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Evolution of magnetic fields and mass flow in a decaying active region will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1169060