ISO results for proto-planetary nebulae.
Volk K., Kwok S., Hrivmak B., Szczerba R.
2001, in Proceedings of the conference "Post-AGB objects as a phase
of stellar evolution", eds. R. Szczerba & S.K. Gorny, ASSL 265,
Kluwer Academic Publishers, Boston/Dordrecht/London, p.323
Abstract:
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We discuss the results of analysis of Infrared Space Observatory spectra
of PPN candidates. In particular for the carbon-rich PPNs in our sample
we have analysis of the 21 and 3o um features as well as the UIR features
and plateaus. The 30 um feature appears to have two sub-components, at
abput 27 and about 34 um, which vary from source to source (Hrivnak, Volk
& Kwok, 2000). based upon dust radiative transfer models we are able
to fit the underlying continuum and so compare feature strengths and shapes
for different objects. The UIR features appear to vary somewhat from source
to source, whereas the broad features seem to be the same in all sources.
We also briefly discuss the galactic distribution of the PPNs.
Gzipped PostScript version of this paper is available:
ISO_21umPPNe.ps.gz
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