Morphology and Dynamics of the Low Solar Chromosphere

Abstract

The Interferometric Bidimensional Spectrometer (IBIS) installed at the Dunn Solar Telescope of the NSO/SP is used to investigate the morphology and dynamics of the lower chromosphere and the virtually non-magnetic fluctosphere below. The study addresses in particular the structure of magnetic elements that extend into these layers. We choose different quiet Sun regions in and outside coronal holes. In inter-network regions with no significant magnetic flux contributions above the detection limit of IBIS, we find intensity structures with the characteristics of a shock wave pattern. The magnetic flux elements in the network are long lived and seem to resemble the spatially extended counterparts to the underlying photospheric magnetic elements. We suggest a modification to common methods to derive the line-of-sight magnetic field strength and explain some of the difficulties in deriving the magnetic field vector from observations of the fluctosphere.

accepted by ApJ, 16 pages, 8 figures

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• Application of speckle and (multi-object) multi-frame blind deconvolution techniques on imaging and imaging spectropolarimetric data
• Chromospheric diagnosis with Ca II lines: forward modeling in forward scattering (I)
• Morphological properties of slender Ca II H fibrils observed by SUNRISE II
• Propagation of transverse waves in the solar chromosphere probed at different heights with ALMA sub-bands