Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002apj...567..412v&link_type=abstract
The Astrophysical Journal, Volume 567, Issue 1, pp. 412-422.
Astronomy and Astrophysics
Astronomy
34
Stars: Circumstellar Matter, Infrared: Stars, Ism: Lines And Bands, Ism: Planetary Nebulae: General, Radiative Transfer, Stars: Agb And Post-Agb
Scientific paper
The intrinsic emission profile of the unidentified broad 30 μm emission feature is derived from Infrared Space Observatory (ISO) spectra of proto-planetary nebulae (PPNs). The feature is resolved into two components: a narrower feature at 26 μm and a broader feature at 33 μm. The intrinsic profiles of these two features and their varying strengths in PPNs are determined. The chemical origin of these features and the processes responsible for their changing strengths from asymptotic giant branch (AGB) stars to PPNs to planetary nebulae are discussed. Based on observations made with ISO, an ESA project with instruments funded by the ESA member states (especially the PI countries: France, Germany, the Netherlands, and the United Kingdom) with the participation of ISAS and NASA.
Hrivnak Bruce J.
Kwok Sun
Szczerba Ryszard
Volk Kevin
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