Hostname: page-component-78c5997874-8bhkd Total loading time: 0 Render date: 2024-11-06T06:05:59.070Z Has data issue: false hasContentIssue false

Models of Planetary Nebulae

Published online by Cambridge University Press:  22 September 2016

M. Perinotto*
Affiliation:
Astrophysical Observatory of Arcetri, Italy

Extract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

From existing models of planetary nebulae an important discrepancy comes out with the low ionization potential ions, as N+ and 0+, whose calculated line intensities are smaller than the observed ones. In this work the effect of charge transfer reactions between single, double, and triple ionized oxygen and nitrogen with neutral hydrogen is taken into account in a model of NGC 7662. The ionization structure of oxygen and nitrogen becomes strongly modified. The computed fractional abundances of 0+ and N+ turn out substantially larger than in previous models, thus helping to reconcile the computed line emissions from low ionization potential ions with the observed ones. (Paper will appear in Astronomy and Astrophysics.)

Type
Session III: Physical Processes
Copyright
Copyright © Reidel 1978