Radiation-driven mass loss largely determines the life expectancy of massive stars. I will present our most recent mass-loss predictions for massive stars...
On the Formation of Lyman β and the O I 1027 and 1028 Å Spectral Lines
We study the potential of Lyman β and the O I 1027 and 1028 Å spectral lines to help in understanding the properties of the chromosphere and transition region...
On the k-mechanism and the multidimensional Eddington approximation
The suitability of the Eddington approximation as a theoretical framework for the study of the possibility of a k-like overstability mechanism as the driving...
On the Origin of the Type II Spicules: Dynamic Three-dimensional MHD Simulations
Recent high temporal and spatial resolution observations of the chromosphere have forced the definition of a new type of spicule, "type II's," that are...
On the photospheric temperature in small-scale magnetic flux concentrations
Results are presented of 2D radiative transfer calculations performed for geometric configurations that simulate partly evacuated small-scale magnetic flux...
On the Probable Existence of an Abrupt Magnetization in the Upper Chromosphere of the Quiet Sun
We report on a detailed radiative transfer modeling of the observed scattering polarization in the Hα line, which allows us to infer quantitative information on...
On the Sensitivity of Partial Redistribution Scattering Polarization Profiles to Various Atmospheric Parameters
This paper presents a detailed study of the scattering polarization profiles formed under partial frequency redistribution (PRD) in two thermal models of the...
On the sensitivity of the Halpha scattering polarization to chromospheric magnetism
A particularly interesting line for exploring the physical conditions of the quiet solar chromosphere is Halpha , but its intensity profile is magnetically...
Opacity for realistic 3D MHD simulations of cool stellar atmospheres
Context. Realistic three-dimensional time-dependent simulations of stellar near-surface convection employ the opacity binning method for the efficient and...