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Diamonds in dense molecular clouds - A challenge to the standard interstellar medium paradigmObservations of a newly discovered infrared C-H stretching band indicate that interstellar diamond-like material appears to be characteristic of dense clouds. In sharp contrast, the spectral signature of dust in the diffuse interstellar medium is dominated by -CH2- and -CH3 groups. This dichotomy in the aliphatic organic component between the dense and diffuse media challenges standard assumptions about the processes occurring in, and interactions between, these two media. The ubiquity of this interstellar diamond-like material rules out models for meteoritic diamond formation in unusual circumstellar environments and implies that the formation of the diamond-like material is associated with common interstellar processes or stellar types.
Document ID
19930051206
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Allamandola, L. J.
(NASA Ames Research Center Moffett Field, CA, United States)
Sandford, S. A.
(NASA Ames Research Center Moffett Field, CA, United States)
Tielens, A. G. G. M.
(NASA Ames Research Center Moffett Field, CA, United States)
Herbst, T. M.
(Hawaii Univ. Honolulu, United States)
Date Acquired
August 16, 2013
Publication Date
April 2, 1993
Publication Information
Publication: Science
Volume: 260
Issue: 5104
ISSN: 0036-8075
Subject Category
Astrophysics
Accession Number
93A35203
Funding Number(s)
PROJECT: RTOP 199-52-12-04
PROJECT: RTOP 452-33-93-03
Distribution Limits
Public
Copyright
Other

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