Stagnation Flow in Streamer Boundaries

Details Stagnation Flow in Streamer Boundaries Stagnation Flow in Streamer Boundaries

Feb 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002apj...565.1275s&link_type=abstract

The Astrophysical Journal, Volume 565, Issue 2, pp. 1275-1288.

Astronomy and Astrophysics

Astronomy

17

Magnetohydrodynamics: Mhd, Sun: Corona, Sun: Magnetic Fields

Scientific paper

Flow tubes adjacent to closed magnetic field lines on the boundaries of streamers can have spreading factors that change rapidly with height. Numerical models in this thin layer are subject to uncertainties. Here we use an analytic model of magnetically closed and adjacent open regions to compute the spreading factor close to the closed field lines and the flow on the open field lines. We are able to recover the shape of the closed field region, or helmet, and show the evolution of the helmet under slowly increasing temperature. We also show why and when stagnation flow can occur in the vicinity of the cusp at the top of the helmet.

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