An analysis has been carried out of the center-to-limb variation of the apparent sizes of the umbra, penumbra, and whole spot. It has revealed that the umbral...
-
PublicationA statistical study of the geometrical Wilson effect
-
PublicationA Time-dependent Semiempirical Model of the Chromospheric Umbral Oscillation
We present a time-dependent semiempirical model of the chromospheric umbral oscillation in sunspots. This model has been obtained by applying recently developed...
-
PublicationActive region fine structure observed at 0.08 arcsec resolution
Context. The various mechanisms of magneto-convective energy transport determine the structure of sunspots and active regions. Aims: We characterise the...
-
PublicationActive Region Morphologies Selected from Near-side Helioseismic Data
We estimate the morphology of near-side active regions using near-side helioseismology. Active regions from two data sets, Air Force Data Assimilative...
-
PublicationAmbipolar Diffusion in the Lower Solar Atmosphere: Magnetohydrodynamic Simulations of a Sunspot
Magnetohydrodynamic (MHD) simulations of the solar atmosphere are often performed under the assumption that the plasma is fully ionized. However, in the lower...
-
PublicationAn uncombed inversion of multiwavelength observations reproducing the net circular polarization in a sunspot's penumbra
Context. The penumbra of sunspots has a complex magnetic field topology whose three-dimensional organization remains unclear after more than a century of...
-
PublicationAnomalous Circular Polarization Profiles in Sunspot Chromospheres
This paper presents a detailed description, analysis, and interpretation of the spectropolarimetric observations recently reported by Socas-Navarro, Trujillo...
-
PublicationAre small-scale magnetic concentrations spatially coincident with bright facular points?
The usually assumed identification of small-scale magnetic concentrations with bright facular or network points on the photosphere is observationally checked by...
-
PublicationAre solar chromospheric fibrils tracing the magnetic field?
Fibrils are thin elongated features visible in the solar chromosphere in and around magnetized regions. Because of their visual appearance, they have been...