Kinematic Evolution of the Ionized Shells of PNe

Jose Alberto López, M. Pereyra & M.G. Richer

Instituto de Astronomia , UNAM, Mexico

In this contribution I will present the results of measuring the bulk outflow shell velocities for a large number of planetary nebulae that span a wide range of evolutionary stages and different stellar populations. The data are based on the SPM Kinematic Catalogue of galactic planetary nebulae. These results reveal from a statistical perspective the kinematic evolution of the bulk outflow or expansion velocities of PNe and their relation to the changing characteristics of the central star, providing for the first time a solid benchmark from observations for models predictions.

Last update: