On the Origin of the 21 Micron Feature in Post-AGB Stars
- 1 January 1999
- journal article
- Published by Cambridge University Press (CUP) in Symposium - International Astronomical Union
- Vol. 191, 297-302
- https://doi.org/10.1017/s0074180900203203
Abstract
The unidentified emission feature at 21 μm is now observed in 12 sources, all being objects in transition between the asymptotic giant branch and planetary nebulae phases. The relations between the 21 μm and other emission features, such as the PAH features and the broad 30 μm feature, and the possible origins of the 21 μm feature are discussed.Keywords
This publication has 16 references indexed in Scilit:
- Classification and Identification of IRAS Sources with Low‐Resolution SpectraThe Astrophysical Journal Supplement Series, 1997
- Optical Properties of Glassy SiS[TINF]2[/TINF] and the 21 Micron FeatureThe Astrophysical Journal, 1996
- A Mid-Infrared Search for C60 in R Coronae Borealis Stars and IRC + 10216The Astronomical Journal, 1995
- Optical spectroscopy of carbon-rich proto-planetary nebulaeThe Astrophysical Journal, 1995
- Unusual 3 micron emission features in three proto-planetary nebulaeThe Astrophysical Journal, 1992
- The infrared emission spectrum of gas-phase C60 (buckmisterfullerene)Chemical Physics Letters, 1991
- Hydrocarbon emission features in the IR spectra of warm supergiantsThe Astrophysical Journal, 1990
- Unusual infrared line profiles in the post-asymptotic giant branch star HD 56126The Astrophysical Journal, 1990
- A 21 micron emission feature in four proto-planetary nebulaeThe Astrophysical Journal, 1989
- PAH molecules and carbon dust in interstellar cloudsMonthly Notices of the Royal Astronomical Society, 1986