Heating of faculae by electric currents

Details Heating of faculae by electric currents Heating of faculae by electric currents

Jun 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986pazh...12..393k&link_type=abstract

(Pis'ma v Astronomicheskii Zhurnal, vol. 12, May 1986, p. 393-397) Soviet Astronomy Letters (ISSN 0360-0327), vol. 12, May-June

Astronomy and Astrophysics

Astronomy

Faculae, Photosphere, Plasma Heating, Ring Currents, Solar Temperature, Field Strength, Solar Magnetic Field

Scientific paper

A solar facula model is considered describing the facula as a magnetic tube with radius of 100 - 200 km magnetic field strengths of 1500 - 2000 Gauss and solenoid-type configuration of the magnetic field. The circle electric currents related to the magnetic field are located at the boundary of the tube in a thin transition layer. The heating of a facula is due to Joule dissipation. The corresponding thermal conductivity equation is solved. It is shown that the Ohmic heating is significant, and may essentially contribute to the increase of the facula effective temperature when the magnetic field gradient in a transition layer is dB/dr ≡ (3 - 7)Gauss/cm.

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