Why Solar Magnetic Flux Concentrations Are Bright in Molecular Bands

Schüssler, Manfred, Shelyag, Sergiy, Berdyugina, Svetlana, Vögler, Alexander and Solanki, Sami K. (2003) Why Solar Magnetic Flux Concentrations Are Bright in Molecular Bands. The Astrophysical Journal, 597 (2). L173-L176. ISSN 0004-637X

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Official URL: http://dx.doi.org/10.1086/379869

Abstract

Using realistic ab initio simulations of radiative magnetoconvection, we show that the bright structures in images taken in the "G band," a spectral band dominated by lines of the CH molecule, precisely outline small-scale concentrations of strong magnetic fields on the visible solar surface. The brightening is caused by a depletion of CH molecules in the hot and tenuous magnetic structures, thus confirming the model of radiatively heated magnetic flux concentrations. These results provide a firm basis for observational studies of the evolution and dynamics of the small-scale solar magnetic field derived through "proxy magnetometry" with G-band images.

Item Type: Article
Uncontrolled Keywords: Sun: magnetic fields; Sun: photosphere
Subjects: F300 Physics
F500 Astronomy
G100 Mathematics
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User: Sergiy Shelyag
Date Deposited: 23 May 2016 10:33
Last Modified: 13 May 2017 17:55
URI: http://nrl.northumbria.ac.uk/id/eprint/26920

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