Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003assl..283..243g&link_type=abstract
In: Mass-losing pulsating stars and their circumstellar matter. Workshop, May 13-16, 2002, Sendai, Japan, edited by Y. Nakada, M
Astronomy and Astrophysics
Astrophysics
Circumstellar Matter, Hydrocarbon Dust, Iras 22272+5435
Scientific paper
We present spatially resolved 3 μm spectroscopy of hydrocarbon dust in a proto-planetary nebula IRAS 22272+5435. The spectroscopy with adaptive optics system at the 8.2 m Subaru Telescope revealed intriguing spatial distribution of hydrocarbon molecules and dust. The intensity of aromatic hydrocarbon feature at 3.3 μm relative to the aliphatic-feature at 3.4 μm increases with the distance from the central star at 0".35-0".82 (560-1300 AU). The spectral variation is well reproduced by a sequence of spectra of a laboratory analog of hydrocarbon dust subjected to thermal annealing. It indicates that a similar thermal process takes place at the formation of hydrocarbon dust in IRAS 22272+5435.
Gaessler Wolfgang
Goto Miwa
Hayano Yutaka
Iye Masanori
Kamata Yukiko
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