Modelling and distance determination of planetary nebulae |
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Authors: | P A M Van Hoof G C Van De Steene |
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Institution: | (1) Kapteyn Astronomical Instute, P.O. Box 800, NL-9700 Groningen, AV, Netherlands |
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Abstract: | At present the lack of a good, generally accepted distance scale is the major limitation in the study of Planetary Nebula (PN) evolution and their distribution. We describe our fully self-consistent method to derive the physical parameters of a PN, including its distance, from a set of observables. For this we calculate various models and search for a best fit of the model predictions to the observables. An accurate determination of the angular diameter is important for a good distance determination. We think that we shall achieve an accuracy of 30% in distance. We estimate the error in stellar temperature at less than 15% and the uncertainty in the abundances at 0.10 dex. |
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Keywords: | planetary nebulae distance determination photo-ionization modelling |
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