ISO Results for Protoplanetary Nebulae

Details ISO Results for Protoplanetary Nebulae ISO Results for Protoplanetary Nebulae

Aug 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001assl..265..323v&link_type=abstract

Post-AGB Objects as a Phase of Stellar Evolution, Proceedings of the Toruń Workshop held July 5-7, 2000. Edited by R. Szczerba a

Astronomy and Astrophysics

Astrophysics

2

Scientific paper

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 30 microns features as well as the UIR features and plateaus. The 30 micron feature appears to have two sub-components, at about 27 and about 34 microns, 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

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