Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985acasn..26..107n&link_type=abstract
(Acta Astronomica Sinica, vol. 26, no. 2, 1985, p. 107-113) Chinese Astronomy and Astrophysics (ISSN 0275-1062), vol. 9, Dec. 19
Astronomy and Astrophysics
Astrophysics
Faculae, Hall Effect, Ohmic Dissipation, Resistance Heating, Solar Granulation, Solar Magnetic Field, Convection Currents, Magnetic Flux, Plasma Heating, Solar Limb
Scientific paper
It is shown that the formation of faculae is the result of Joule dissipation of the Hall current generated by the interaction of a convection field of granules and the inter-granular magnetic field. The characteristic length of the region generating the Hall current must correspond to a Reynolds number of less than 1. The energy balance equation for a typical faculae region is derived and the results are used to calculate the velocity fields for five observational models of faculae. The proposed mechanism can also be used to explain the dependence of the facula brightness on the strength of the magnetic fields, as well as the apparent distribution of faculae on the solar disk. A schematic diagram showing an inter-granular magnetic flux tube in a convection field of granules is provided.
Chen Zai-Zhang
Fang Chen
Jiang Yao-Tiao
Ni Xiang-Bin
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