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| Paper: |
Central Stars of Milky Way Bulge Planetary Nebulae |
| Volume: |
469, 18th European White Dwarf Workshop (EUROWD12) |
| Page: |
313 |
| Authors: |
Gesicki, K.; Zijlstra, A. A. |
| Abstract: |
Masses of central stars are derived for a sample of planetary nebulae from the
Milky Way bulge, using a detailed analysis of the kinematics of the
nebulae. The masses are significantly discrepant from the mass distribution of
white dwarfs. We show that this may be caused by an underestimation of
post-AGB evolution speeds in stellar evolution models, especially for the
lowest mass stars. A much improved fit is obtained if we accelerate the model
evolution by a factor of four. This also reproduces well two stellar masses
measured through asteroseismology. Such an acceleration is possible if the
envelope mass at the tip of the AGB is overestimated in the models. |
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