Dynamical Phenomena in the Atmosphere of the Proto-Planetary Nebula IRAS 22272+5435

Details Dynamical Phenomena in the Atmosphere of the Proto-Planetary Nebula IRAS 22272+5435 Dynamical Phenomena in the Atmosphere of the Proto-Planetary Nebula IRAS 22272+5435

Apr 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009apj...695l.203z&link_type=abstract

The Astrophysical Journal Letters, Volume 695, Issue 2, pp. L203-L207 (2009).

Astronomy and Astrophysics

Astronomy

3

Line: Profiles, Shock Waves, Stars: Agb And Post-Agb, Stars: Mass Loss, Stars: Oscillations, Stars: Winds, Outflows

Scientific paper

Radial velocity monitoring of the star HD 235858 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 redshifted 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, appearance of CN emission lines, blue wings of strong lines, and recent reddening give evidence of shocks and mass outflow obviously induced by atmospheric pulsations.

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