Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-03-23
Astronomy and Astrophysics
Astrophysics
20 pages, 11 fig. To appear in Revista Mexicana de Astronomia y Astrofisica, April 2006
Scientific paper
Expansion velocities (Vexp) of different ions and line widths at the base of the lines are measured and analyzed for 24 PNe with [WC]-type nuclei (WRPNe), 9 PNe ionized by WELS (WLPNe) and 14 ordinary PNe. A comparative study of the kinematical behavior of the sample clearly demonstrates that WRPNe have in average 40-45% larger Vexp, and possibly more turbulence than WLPNe and ordinary PNe. WLPNe have velocity fields very much alike the ones of ordinary PNe, rather than the ones of WRPNe. All the samples (WRPNe, WLPNe and ordinary PNe) show expansion velocities increasing with age indicators, for example
Medina S.
Morisset Charles
Peña Manuel
Stasinska Grazina
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