The absorption coefficient of gaseous ozone has been measured for the mercury lines at
2537, 2894, 2967, 3021, 3342, and 5770 Å, by measuring the optical absorption and the …

The instantaneous population densities for the excited levels of hydrogen-like ions in an
optically thin plasma, which is not necessarily in equilibrium, have been calculated for a range …

The energy balance and mass loss of stellar coronae ADS Classic is now deprecated. It will be
completely retired in October 2019. This page will automatically redirect to the new ADS …

A model for a stellar wind driven by linear acoustic waves ADS Classic is now deprecated. It
will be completely retired in October 2019. This page will automatically redirect to the new ADS …

A mechanism for the chromospheric heating of very hot stars is suggested. A linearized
theory shows that sound waves will be ampli ied by an interaction of the perturbations of the …

The radiative transfer of Doppler broadened resonance lines in a plasma which is not in
local thermodynamic equilibrium is studied for a simple model of an infinite, uniform plane …

The P Cygni type profile of Hoc of the O 9.5 I b supergiant,(Orionis, measured by Conti and
Leep has been interpreted in terms of a uniform spherically symmetrical shell where the …

The population densities of the bound levels of neutral helium have been calculated for a 41-level
model atom using recent calculations of the cross-sections for collisional excitation …

The existence of a Rayleigh-Taylor-type instability in the atmospheres of hot stars, driven by
the radiative force associated with impurity ion resonance lines, is demonstrated. In a hot …

The main differences between a coronal hole and quiet coronal regions are explained by a
reduction of the thermal conduction coefficient by transverse components of the magnetic …