Observations of a bright plume in solar granulation
Aims:The aim of this paper is to analyze the thermal properties, oscillatory, and flow motions of a bright, long-lasting feature observed in solar granulation...
Observations of a nearby filament of galaxy clusters with the Sardinia Radio Telescope
We report the detection of diffuse radio emission which might be connected to a large-scale filament of the cosmic web covering a 8° × 8° area in the sky...
Observations of Ellerman bomb emission features in He i D3 and He i 10 830 Å
Context. Ellerman bombs (EBs) are short-lived emission features, characterised by extended wing emission in hydrogen Balmer lines. Until now, no distinct...
On Kelvin-Helmholtz and parametric instabilities driven by coronal waves
The Kelvin-Helmholtz instability has been proposed as a mechanism to extract energy from magnetohydrodynamic (MHD) kink waves in flux tubes, and to drive...
On Spectropolarimetric Measurements with Visible Lines
The ability of new instruments for providing accurate inferences of vector magnetic fields and line-of-sight velocities of the solar plasma depends a great deal...
On the 3D structure of the magnetic field in regions of emerging flux .
We explore the photospheric and chromospheric magnetic field in an emerging flux region. An image of the equivalent width of the He I 10830 Å red blended...
On the Atomic Polarization of the Ground Level of Na I
In a recent Letter, we showed the remarkable result that the atomic alignment of the levels P1/2 and S1/2 of the D1 line of Na I is practically destroyed in the...
On the Diagnostic Potential of Hα for Chromospheric Magnetism
We investigate the feasibility of measuring line-of-sight magnetic field strength in the solar chromosphere through Stokes polarimetry in the hydrogen Hα line...
On the Distribution of Quiet-Sun Magnetic Fields at Different Heliocentric Angles
This paper presents results from the analysis of high signal-to-noise ratio spectropolarimetric data taken at four heliocentric angles in quiet-Sun internetwork...