Pressure equilibrium and energy balance of small photospheric fluxtubes

Details Pressure equilibrium and energy balance of small photospheric fluxtubes Pressure equilibrium and energy balance of small photospheric fluxtubes

Dec 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976soph...50..269s&link_type=abstract

Solar Physics, vol. 50, Nov.-Dec. 1976, p. 269-295. Research supported by the Nederlandse Organisatie voor Zuiver Wetenschappeli

Physics

225

Energy Transfer, Gas Pressure, Magnetostatic Fields, Photosphere, Solar Magnetic Field, Convective Heat Transfer, Equilibrium, Heat Balance, Heat Flux, Magnetic Field Configurations, Magnetic Flux, Radiative Heat Transfer, Sunspots, Temperature Distribution

Scientific paper

It has been proposed that a magnetostatic equilibrium such as exists in sunspots may confine flux tubes with fields of the order of 1700 G. Consequences of applying the magnetostatic hypothesis to flux tubes with diameters less than about 1000 km are investigated using a diffusion approximation for radiative and convective heat transport. The effect of radial heat influx on the structure of the tube interior is determined, and magnetostatic configurations are obtained for small tubes characterized by radius, Wilson depression, and heat flux. Field configurations and temperature distributions within axisymmetric tubes are computed on the basis of pressure equilibrium and energy balance; a set of models is presented for tubes ranging in size from facular points to small pores. The appearance of a magnetostatic flux tube on the solar disk is examined along with the tube wall temperature, intensity contrast, and other proposals for confinement mechanisms.

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