On Molecular Hydrogen Formation and the Magnetohydrostatic Equilibrium of Sunspots

@article{Jaeggli2012OnMH,
  title={On Molecular Hydrogen Formation and the Magnetohydrostatic Equilibrium of Sunspots},
  author={S. Jaeggli and H. Lin and H. Uitenbroek},
  journal={The Astrophysical Journal},
  year={2012},
  volume={745},
  pages={133}
}
We have investigated the problem of sunspot magnetohydrostatic equilibrium with comprehensive IR sunspot magnetic field survey observations of the highly sensitive Fe I lines at 15650 ? and nearby OH lines. We have found that some sunspots show isothermal increases in umbral magnetic field strength which cannot be explained by the simplified sunspot model with a single-component ideal gas atmosphere assumed in previous investigations. Large sunspots universally display nonlinear increases in… Expand
A Fractal Analysis of Magnetograms Within Active Regions
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