Expansion Velocities of Planetary Nebulae with [WC] Central Stars

Details Expansion Velocities of Planetary Nebulae with [WC] Central Stars Expansion Velocities of Planetary Nebulae with [WC] Central Stars

Jan 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003rmxac..15...38p&link_type=abstract

Winds, Bubbles, and Explosions: a conference to honor John Dyson, Pátzcuaro, Michoacán, México, September 9-13, 2002 (Eds. S. J.

Astronomy and Astrophysics

Astronomy

1

Planetary Nebulae, Stars: Post-Agb, Stars: Wolf-Rayet

Scientific paper

High resolution spectra have been used to determine the expansion velocities of a large sample of planetary nebulae around [WC] central stars. The results are compared with expansion velocities of non-WR planetary nebulae. All the data were obtained in a consistent way. We find that WRPNe have larger expansion velocities and larger turbulence than non-WRPNE, demonstrating that the mechanical energy of the massive [WC] stellar wind strongly affects the kinematical behavior of nebulae. A weak relation between stellar temperature and expansion velocities has been found for WRPNe, indicating that older nebulae expand faster. This could be useful in testing the evolutionary sequence proposed for [WC] stars.

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