Pederson Current Dissipation In Emerging Active Regions

Details Pederson Current Dissipation In Emerging Active Regions Pederson Current Dissipation In Emerging Active Regions

May 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011spd....42.1733l&link_type=abstract

American Astronomical Society, SPD meeting #42, #17.33; Bulletin of the American Astronomical Society, Vol. 43, 2011

Astronomy and Astrophysics

Astronomy

Scientific paper

Pederson current dissipation in emerging active regions.
Certain regions of the solar atmosphere, such as the photosphere and chromosphere, as well as prominences, contain a significant amount of neutral atoms, and a complete description of the plasma requires including the effects of partial ionization. In the chromosphere the dissipation of Pederson currents is important for the evolution of emerging magnetic fields.
Due to the relatively high number density in the chromosphere, the ion-neutral collision time-scale is much smaller than timescales associated with flux emergence. Hence we use a single-fluid approach to model the partially ionized plasma. Looking at both the emergence of large-scale sub-surface structures, and the emergence and reconnection of undulatory fields, we investigate the effect of Pederson current dissipation on the state of the emerging field, on magnetic reconnection and on dissipative heating of the atmosphere. Specifically we examine the effect of motions across fieldlines in the partially ionized regions, and how this can increase the free energy supplied to the corona by flux emergence. We also look at reconnection associated with flux emergence in the partially ionized atmosphere, and how this can account for observed small-scale brightenings (Ellerman Bombs).

Affiliated with

Also associated with

No associations

Rating

Pederson Current Dissipation In Emerging 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 Pederson Current Dissipation In Emerging Active Regions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pederson Current Dissipation In Emerging Active Regions will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1204609