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Turbulent planetary nebulae around [WC]–type stars
Astronomy and Astrophysics
Through a high-resolution spectroscopic survey, we analyze the velocity field of 16 planetary nebulae with [WC]-or wels-type nuclei in comparison with 8 nebulae having other central star types. We found spectral evidence for finite turbulent velocities in [WC]-type planetary nebulae superimposed on an essentially constant expansion velocity pattern. The nebulae around O-type stars show no evidences for significant turbulence while their expansion velocity is found to increase outwards. Bothdoi:10.1051/0004-6361:20020009 fatcat:y4igiuq5ovb4pfwdolaii22dye