Neue Modellrechnungen für Planetarische Nebel, angewandt auf NGC 6572
Abstract
The present investigation is concerned with a model for the exact calculation of the absorption capacity of nebula matter, taking into consideration, at every field point, the diffuse radiation from the entire nebula. The model nebula is subdivided into (maximum 15) concentric spherical shells. The ionization and energy equilibrium is calculated for each shell. The described model is applied to the planetary nebula NGC 6572, taking into account element abundances for H, He, C, N, O, Ne, Mg, Si, and S. Results obtained with respect to relative line fluxes in the current investigation are compared with data from 'on-the-spot approximation' studies, and observational data. Possibilities regarding the existence of a stellar wind supplying additional photons which lead to an ionization of He(+) are briefly considered.
- Publication:
-
Mitteilungen der Astronomischen Gesellschaft Hamburg
- Pub Date:
- 1983
- Bibcode:
- 1983MitAG..60..331B
- Keywords:
-
- Planetary Nebulae;
- Stellar Models;
- Abundance;
- Radiation Absorption;
- Stellar Radiation;
- Stellar Winds;
- Astrophysics