Magnetic clouds, helicity conservation, and intrinsic scale flux ropes

Details Magnetic clouds, helicity conservation, and intrinsic scale flux ropes Magnetic clouds, helicity conservation, and intrinsic scale flux ropes

Jun 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995sowi.conf...46k&link_type=abstract

Johns Hopkins Univ., International Solar Wind 8 Conference, p. 46

Computer Science

Interplanetary Magnetic Fields, Plasma Clouds, Magnetic Clouds, Solar Wind, Solar Corona, Magnetic Properties, Energy Dissipation, Cosmic Rays, Heating, Sun, Thermodynamic Properties

Scientific paper

An intrinsic-scale flux-rope model for interplanetary magnetic clouds, incorporating conservation of magnetic helicity, flux and mass is found to adequately explain clouds' average thermodynamic and magnetic properties. In spite their continuous expansion as they balloon into interplanetary space, magnetic clouds maintain high temperatures. This is shown to be due to magnetic energy dissipation. The temperature of an expanding cloud is shown to pass through a maximum above its starting temperature if the initial plasma beta in the cloud is less than 2/3. Excess magnetic pressure inside the cloud is not an important driver of the expansion as it is almost balanced by the tension in the helical field lines. It is conservation of magnetic helicity and flux that requires that clouds expand radially as they move away from the Sun. Comparison with published data shows good agreement between measured cloud properties and theory. Parameters determined from theoretical fits to the data, when extended back to the Sun, are consistent with the origin of interplanetary magnetic clouds in solar filament eruptions. A possible extension of the heating mechanism discussed here to heating of the solar corona is discussed.

Affiliated with

Also associated with

No associations

Rating

Magnetic clouds, helicity conservation, and intrinsic scale flux ropes 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 Magnetic clouds, helicity conservation, and intrinsic scale flux ropes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetic clouds, helicity conservation, and intrinsic scale flux ropes will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-759859