Back to Volume
Paper: Dynamical Phenomena in the Atmosphere of the Proto-Planetary Nebula HD 235858
Volume: 445, Why Galaxies Care about AGB Stars II: Shining Examples and Common Inhabitants
Page: 189
Authors: Začs, L.; Sperauskas, J.; Smirnova, O.; Barzdis, A.
Abstract: Radial-velocity monitoring of the star HD 235858 has confirmed regular variations with a peak-to-peak amplitude of about 10 km s-1 and a period of about 131.2 days. The light, color, and velocity variations are typical for RV Tauri stars. Splitting of low-excitation atomic lines was detected. The components are both blue- and red-shifted relative to the systemic velocity. Significant variations are observed in the intensity of C2 and CN lines. Variable emission in the Hα profile, splitting of low-excitation atomic absorption lines, the appearance of CN emission lines, and the blue wings of strong atomic lines give evidence of shocks and mass outflow evidently induced by atmospheric pulsations.
Back to Volume