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An investigation of the 3-mu m emission bands in planetary nebulae

Abstract:

Spectra are presented of 21 planetary nebulae spanning the well-known, but still unidentified, narrow emission features at 3.2-3.6 μm. The equivalent width of the 3.29-μm emission band is strongly correlated with the gas-phase carbon-to-oxygen ratio, as expected for a band origin in carbon-rich grains or molecules. It displays an approximately linear dependence upon the C/O ratio, with a threshold near C/O ∼0.6. The emission band is present in 18 of the 21 nebulae, being absent in three of th...

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Publication status:
Published

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Publisher copy:
10.1093/mnras/280.3.924

Authors


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Institution:
University of Oxford
Department:
Oxford, MPLS, Physics, Astrophysics
Role:
Author
Journal:
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume:
280
Issue:
3
Pages:
924-936
Publication date:
1996-06-01
DOI:
EISSN:
1365-2966
ISSN:
0035-8711
URN:
uuid:e5a4c40e-2e96-45a0-b49b-47ad3f74aaef
Source identifiers:
21254
Local pid:
pubs:21254

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