Stratification of canopy magnetic fields in a plage region. Constraints from a spatially-regularized weak-field approximation method

摘要: The role of magnetic fields in the chromospheric heating problem remains greatly unconstrained. Most theoretical predictions from numerical models rely on a configuration, field strength and connectivity whose details have not been well established with observational studies. High-resolution studies plage are very scarce or non-existent general. Our aim is to study stratification vector regions. We use high-spatial resolution full-Stokes observations acquired CRISP instrument at Swedish 1-m Solar Telescope Mg I $\lambda$5173, Na $\lambda$5896 Ca II $\lambda$8542 lines. developed spatially-regularized weak-field approximation (WFA) method based idea spatial regularization. This allows for fast computation maps an extended view. fidelity this new technique has assessed using snapshot realistic 3D magnetohydrodynamics simulation. derived depth-stratification line-of-sight component photosphere chromosphere region. concentrated intergranular lanes expand horizontally toward chromosphere, filling all space forming canopy. results suggest that lower boundary canopy must be located around 400-600 km photosphere. mean total ($z\approx760$ km) 658 G. At $z=1160$ we estimate $ \approx 417$ propose modification WFA improves its applicability data worse signal-to-noise ratio. These methods provide quick reliable way studying multi-layer without many difficulties inherent other inversion methods.