We studied the line shape of Rb D 1 and D 2 resonance lines in the presence of 1–10 amg
of several gases: 3 He, 4 He, N 2, and Xe. We found that the line cores are well described by …

At the low temperatures achieved in cool brown dwarf and hot giant planet atmospheres, the
less refractory neutral alkali metals assume an uncharacteristically prominent role in …

Observations of cooler and cooler brown dwarfs show that the contribution from broadening
at many bars pressure is becoming important. The opacity in the red optical to near-IR …

We report the results of a study of the pressure broadening and resonant frequency shift of
the absorption profiles of the D 1 and D 2 lines of Rb and K in the presence of 3 He and N 2 …

Abstract The Rautian-Sobelman approach describing the collision-Doppler shape of
spectral line that takes into account both soft and hard velocity-changing collisions is …

This book presents a comprehensive overview of the modern theory of spectral line
broadening and shifting by pressure of atmospheric gases. It describes current semi …

We present the first brown dwarf atmosphere models based on theoretical calculations of
absorption profiles of sodium and potassium perturbed by helium and molecular hydrogen …

We investigate the absorption spectrum of a Rydberg impurity immersed in and interacting
with an ideal Bose-Einstein condensate. Here, the impurity-bath interaction range can …

The visible and near-infrared spectra of late L-and T-type dwarf stars are dominated in large
part by the resonance lines of neutral Na and K. It is the collision broadening of these atomic …

A review of recent experiments involving a newly developed Pound-Drever-Hall-locked
frequency-stabilized cavity ring-down spectroscopy (PDH-locked FS-CRDS) system is …