| |
 |
| 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. |
|
|
|
|
|
