Hostname: page-component-586b7cd67f-dsjbd Total loading time: 0 Render date: 2024-11-29T11:44:39.280Z Has data issue: false hasContentIssue false

Time-Dependent Effects in Planetary Nebulae Caused by Thermal Pulses in Central Stars

Published online by Cambridge University Press:  22 September 2016

R. Tylenda*
Affiliation:
Nicolaus Copernicus University, Torún, Poland

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.

Nuclei of planetary nebulae are suspected to go through thermal pulses. A time scale of such pulses is of the order of 10–103 years and so it is comparable with the time of recombination in a typical planetary nebula. Theoretical models have been constructed to study evolution of ionization structure of nebulae in which the spectrum of ionizing radiation varies with time. Resulting intensities of emission lines are compared with those produced by stationary model nebulae.

Type
Session IV: The Central Stars of Planetary Nebulae
Copyright
Copyright © Reidel 1978