Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000a%26as..141..149g&link_type=abstract
Astronomy and Astrophysics Supplement, v.141, p.149-156
Astronomy and Astrophysics
Astrophysics
15
(Stars:) Circumstellar Matter, Stars: Individual (Iras 05341+0852), Stars: Agb And Post-Agb, (Ism:) Dust, Extinction, Infrared: Ism: Lines And Bands, Methods: Laboratory
Scientific paper
We investigate the spectroscopic alteration through thermal annealing on the quenched carbonaceous composite (QCC) produced from hydrocarbon plasma. The emission and absorption spectra of QCC samples annealed at various temperatures indicate that the proportion of aliphatic C-H bonds in QCC decreases relative to aromatic C-H bonds with increase of annealing temperature. By comparing the spectra of annealed QCC with observed emission spectra of proto-planetary nebulae, similarity between the spectral sequence obtained in the laboratory and that in the observational data is clearly noticed. On this basis, we discuss a simple evolutional scenario of carbon dust in circumstellar environment around cool evolved stars.
Goto Mario
Kaito Chihiro
Kimura Sachie
Maihara Toshinori
Terada Hiroshi
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