Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000a%26a...364..597g&link_type=abstract
Astronomy and Astrophysics, v.364, p.597-612 (2000)
Astronomy and Astrophysics
Astrophysics
16
Ism: Planetary Nebulae: Individual: Bd +30O, Ism: Planetary Nebulae: Individual: He 2-99, Ism: Planetary Nebulae: Individual: He 2-142, Ism: Planetary Nebulae: Individual: Sw St 1, Stars: Mass-Loss, Turbulence
Scientific paper
Using spectroscopic observations taken at the Observatoire de Haute-Provence (OHP, France) and the European Southern Observatory (ESO, Chile), we describe wind fluctuations in four [WC 9-10]-type central stars of planetary nebulae, especially BD +30° 3639, which was observed intensively during 15 nights. Moving features seen on the top of the C Iiilambda 5696 emission line are interpreted as outflowing ``blobs'' which are radially accelerated outwards, as seen in the winds of massive Wolf-Rayet stars. We find line profile variations occurring on a time scale of hours. Kinematic parameters of the blobs are derived and compared to those of massive Wolf-Rayet stars. The wind fragmentation process appears independent of the strong differences between both types of hot stars.
Acker Agnés
Grosdidier Yves
Moffat Anthony F. J.
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