Although the h and k lines of Mg II are expected to be of great interest for probing the upper solar chromosphere, relatively little is known about their...
The polarization signals of the solar K I D lines and their magnetic sensitivity
Aims: This work aims to identify the relevant physical processes in shaping the intensity and polarization patterns of the solar K I D lines through spectral...
The Polarization Signature of Photospheric Magnetic Fields in 3D MHD Simulations and Observations at Disk Center
Before using three-dimensional (3D) magnetohydrodynamical (MHD) simulations of the solar photosphere in the determination of elemental abundances, one has to...
The development of effective iterative methods capable of accurately solving NLTE Stokes transfer problems is of considerable importance for the investigation...
The Polarization-Free Approximation Applied to Multi-Level Non-LTE Radiative Transfer
The polarization-free (POF) approximation (Trujillo Bueno and Landi Degl'Innocenti, 1996) is capable of accounting for the approximate influence of the magnetic...
The population of barred galaxies in the local universe. I. Detection and characterisation of bars
Context: Bars are very common in the centre of the disc galaxies, and they drive the evolution of their structure. The state-of-the-art imaging and redshift...
We present new B, V and I CCD time-series photometry for 177 variable stars in a 13 × 13arcmin2 field centred on the globular cluster M54 (lying at the centre...
The population, magnitudes, and sizes of Jupiter family comets
We analyze the sample of measured nuclear magnitudes of the observed Jupiter family (JF) comets (taken as those with orbital periods P 20 years and Tisserand...
The Possible Ascent of a Closed Magnetic System through the Photosphere
We present a comprehensive interpretation of the evolution of a small magnetic region observed during its entire disk passage. The vector magnetic field...