Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998apj...492..402r&link_type=abstract
Astrophysical Journal v.492, p.402
Astronomy and Astrophysics
Astronomy
41
Instabilities, Sun: Magnetic Fields, Sun: Sunspots
Scientific paper
Mass and energy flow near sunspots are associated with the emergence of magnetic flux, which then moves outward in the sunspot moat. We present results of analytical and numerical studies of the interaction of horizontal magnetic flux and plasma flows in three-dimensional geometry. We show that nonlinear coupling of flux and plasma flows in the presence of a gravitational field lead to nonlinear dissipative instabilities that result in the formation of a solitary kink along the magnetic flux. The stability of a kink and its further evolution depend on the physical parameters of magnetic flux and the surrounding medium. We discuss two major cases--magnetic soliton-like and shocklike propagation along the magnetic flux--and specify the appropriate physical conditions for their realization. In photospheric conditions, the proposed mechanism may be a good candidate for understanding of the dynamics of small-scale magnetic flux in the enhanced network at the solar surface. We apply our results to the observed properties of emerging flux in the sunspot region associated with moving magnetic features and find reasonable qualitative and quantitative agreement.
Ryutova Margarita
Sakai Jun-Ichi
Shine Richard
Title Alan
No associations
LandOfFree
A Possible Mechanism for the Origin of Emerging Flux in the Sunspot Moat 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 Possible Mechanism for the Origin of Emerging Flux in the Sunspot Moat, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A Possible Mechanism for the Origin of Emerging Flux in the Sunspot Moat will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1652913