An extensive study of planetary nebulae in the Galactic bulge. II - Statistical properties of the nebular envelopes
Abstract
The nebular properties of a sample of about 200 planetary nebulae lying in the Galactic bulge have been studied. Similarly to what has been found on other samples of planetary nebulae, an apparent decrease of the filling factor and an increase of the ionized mass with the measured radius have been obtained. These trends are artifacts due to error propagation. By comparison with a simulation of a population of planetary nebulae including the observational errors and selection effects, it is shown that these observational diagrams are in fact entirely compatible with a population of planetary nebulae having central stars in the range 0.55-0.65 solar masses, nebular masses around 0.2 solar masses and a filling factor about 0.5. In this picture, most of the Galactic bulge planetary nebulae are density bounded.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- July 1991
- Bibcode:
- 1991A&A...247..173S
- Keywords:
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- Galactic Bulge;
- Planetary Nebulae;
- Milky Way Galaxy;
- Star Formation;
- Statistical Analysis;
- Astrophysics