Solar coronal heating by magnetosonic waves

Details Solar coronal heating by magnetosonic waves Solar coronal heating by magnetosonic waves

Sep 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001mnras.326..675p&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 326, Issue 2, pp. 675-685.

Astronomy and Astrophysics

Astronomy

8

Mhd, Sun: Corona, Sun: General

Scientific paper

Solar coronal heating by magnetohydrodynamic (MHD) waves is investigated. ultraviolet (UV) and X-ray emission lines of the corona show non-thermal broadenings. The wave rms velocities inferred from these observations are of the order of 25-60kms-1. Assuming that these values are not negligible, we solved MHD equations in a quasi-linear approximation, by retaining the lowest order non-linear term in rms velocity. Plasma density distribution in the solar corona is assumed to be inhomogeneous. This plasma is also assumed to be permeated by dipole-like magnetic loops. Wave propagation is considered along the magnetic field lines. As dissipative processes, only the viscosity and parallel (to the local magnetic field lines) heat conduction are assumed to be important. Two wave modes emerged from the solution of the dispersion relation. The fast mode magneto-acoustic wave, if originated from the coronal base can propagate upwards into the corona and dissipate its mechanical energy as heat. The damping length-scale of the fast mode is of the order of 500km. The wave energy flux associated with these waves turned out to be of the order of 2.5×105ergscm-2s-1 which is high enough to replace the energy lost by thermal conduction to the transition region and by optically thin coronal emission. The fast magneto-acoustic waves prove to be a likely candidate to heat the solar corona. The slow mode is absent, in other words cannot propagate in the solar corona.

Affiliated with

Also associated with

No associations

Rating

Solar coronal heating by magnetosonic waves 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 Solar coronal heating by magnetosonic waves, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Solar coronal heating by magnetosonic waves will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1155202