Validation of a Global 3D-MHD Model for the Synoptic Solar Wind

Details Validation of a Global 3D-MHD Model for the Synoptic Solar Wind Validation of a Global 3D-MHD Model for the Synoptic Solar Wind

May 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agusmsh23c..01c&link_type=abstract

American Geophysical Union, Spring Meeting 2007, abstract #SH23C-01

Astronomy and Astrophysics

Astrophysics

7500 Solar Physics, Astrophysics, And Astronomy, 7509 Corona, 7959 Models

Scientific paper

We developed a global 3D MHD model for the ambient solar. The model is driven by SOHO MDI magnetogram data, and is constrained by the empirical Wang-Sheeley-Arge (WSA) model. The WSA provides the distribution of the asymptotic solar wind speed; therefore it also provides the distribution of the kinetic energy. Assuming that far from the Sun the total energy is dominated by the energy of the bulk motion and assuming the conservation of the Bernoulli integral, we can trace the total energy along a magnetic field line to the solar surface. Since the gravitational energy on the surface is known, and the kinetic energy is negligible, we can obtain the distribution of the polytropic index on the surface of the Sun. By interpolating the value of the polytropic index to a spherically constant value of 1.1 at the source surface and to 1.5 at 5 Rs, we use this spatial distribution of the polytropic index in the energy equation to get a self-consistent, steady state MHD solution for the ambient, synoptic solar wind. We present a long-term comparison of the model results with observations at 1AU.

Affiliated with

Also associated with

No associations

Rating

Validation of a Global 3D-MHD Model for the Synoptic Solar Wind 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 Validation of a Global 3D-MHD Model for the Synoptic Solar Wind, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Validation of a Global 3D-MHD Model for the Synoptic Solar Wind will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1037486