Boundary conditions and critical surfaces in astrophysical MHD winds.

Details Boundary conditions and critical surfaces in astrophysical MHD winds. Boundary conditions and critical surfaces in astrophysical MHD winds.

Jul 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997a%26a...323..634b&link_type=abstract

Astronomy and Astrophysics, v.323, p.634-643

Astronomy and Astrophysics

Astrophysics

31

Mhd, Solar Wind, Pulsars, Ism, Jets And Outflows, Galaxies, Jets

Scientific paper

Boundary conditions and the nature of the critical surfaces for the problem of stationary MHD outflows are formulated from the point of view of the causality principle. It is shown that the number of the boundary conditions which have to be specified on the surface of the object ejecting plasma is equal to the number of MHD waves outgoing normally from this surface. The boundary conditions for objects of different nature are formulated. It is shown that the spherically symmetric Parker solution of the pure hydrodynamical outflow of the plasma from the surface of the star with a given temperature and density of the plasma on the surface of the star is not the unique solution. To pick out the unique solution of this problem an additional condition defining the tangential components of the velocity of the plasma on the surface of the star must be specified. The nature and properties of the critical surfaces are studied and the rules to determine the critical surfaces in MHD flow are proposed. In the general case, the critical surfaces where the general solution of the problem is singular are placed on characteristics. The slow and the fast mode critical surfaces do not coincide strictly speaking with the classical critical surfaces.

Affiliated with

Also associated with

No associations

Rating

Boundary conditions and critical surfaces in astrophysical MHD winds. 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 Boundary conditions and critical surfaces in astrophysical MHD winds., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Boundary conditions and critical surfaces in astrophysical MHD winds. will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1183827