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On expansion parallax distances for planetary nebulae
Garrelt Mellema
The distances to individual wind-driven bubbles such as Planetary Nebulae (PNe) can be determined using expansion parallaxes: the angular expansion velocity in the sky is compared…
Three-Dimensional Adaptive Mesh Refinement Simulations of Point-Symmetric Nebulae
Erik-Jan Rijkhorst, Vincent Icke, Garrelt Mellema
Previous analytical and numerical work shows that the generalized interacting stellar winds model can explain the observed bipolar shapes of planetary nebulae very well. However, m…
3D AMR Simulations of Point-Symmetric Nebulae
Erik-Jan Rijkhorst, Vincent Icke, Garrelt Mellema
At the end of their lives low mass stars such as our Sun lose most of their mass. The resulting planetary nebulae show a wide variety of shapes, from spherical to highly bipolar. A…
The post-AGB evolution of AGB mass loss variations
Rowin Meijerink, Garrelt Mellema, Yvonne Simis
We present new numerical hydrodynamical modelling of the evolution of Asymptotic Giant Branch (AGB) mass loss fluctuations during the post-AGB/Planetary Nebula phase. These models…