On the origin of the prolate solar chromosphere

Details On the origin of the prolate solar chromosphere On the origin of the prolate solar chromosphere

Oct 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000soph..196..311f&link_type=abstract

Solar Physics, v. 196, Issue 2, p. 311-320 (2000).

Physics

6

Scientific paper

A simple geometric model is proposed to explain the recently reported effect of the prolateness of the solar chromosphere. We assume that a specific dynamical part of the solar atmosphere above the 2 Mm level, being a mixture of moving up and down jets of chromospheric matter with the coronal plasma between them, is responsible for the solar prolateness. Due to the dynamic nature of this layer, the magnetic field is considered to play a very important role in the density distribution with the height, guiding the mass flows along the field lines. The difference of the magnetic field topology in the polar and the equatorial regions leads to different heights of the chromospheric limb. Calculations show a satisfactory coincidence with observations when the mean separation between opposite polarity concentrations is about 9 Mm. The possible observational signature of this network in low photospheric and chromospheric layers is discussed.

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