Solar sources of the interplanetary magnetic field and solar wind

Details Solar sources of the interplanetary magnetic field and solar wind Solar sources of the interplanetary magnetic field and solar wind

Mar 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977jgr....82.1061l&link_type=abstract

Journal of Geophysical Research, vol. 82, Mar. 1, 1977, p. 1061-1065.

Physics

71

Harmonic Analysis, Interplanetary Magnetic Fields, Photosphere, Solar Magnetic Field, Solar Wind, Lines Of Force, Potential Fields, Solar Corona

Scientific paper

Open magnetic field lines, those which extend from the solar photosphere to interplanetary space, are traced in the current-free (potential field) approximation using measured photospheric fields as a boundary condition. It is found that (1) only a relatively small fraction of the photospheric area connects via open field lines to the interplanetary magnetic field; (2) those photospheric areas which do contribute open field lines lie beneath coronal holes and within the boundaries of the holes as projected onto the photosphere or else between loop systems of an active region; (3) the interplanetary magnetic field in the plane of the sun's equator, essentially the field in the ecliptic plane, may connect to photospheric regions of high latitude; and (4) the fastest solar wind streams are correlated with those magnetic flux tubes which expand least in cross-sectional area over the distance between the photosphere and the coronal height where the solar wind begins.

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