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Interstellar polycyclic aromatic hydrocarbons and carbon in interplanetary dust particles and meteoritesRaman spectra of interplanetary dust particles (IDPs) and meteorites containing material similar to polycyclic aromatic hydrocarbons (PAHs) show features that are similar in position and relative strength to interstellar IR emission features attributable to vibrational transitions in free molecular-sized PAHs. In addition, these spectra sometimes show red photoluminescence that has elsewhere been attributed to PAHs, and a part of the carbonaceous phase in IDPs and meteorites contain a degree of deuterium enrichment anticipated in small, free PAHs that are exposed to ISM UV radiation. These observations suggest that some of the IDPs' carbonaceous material may have been produced in circumstellar dust shells, and only slightly modified in interstellar space.
Document ID
19870059526
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)
Wopenka, B.
(Washington University Saint Louis, MO, United States)
Date Acquired
August 13, 2013
Publication Date
July 3, 1987
Publication Information
Publication: Science
Volume: 237
ISSN: 0036-8075
Subject Category
Astrophysics
Accession Number
87A46800
Funding Number(s)
CONTRACT_GRANT: NSF EAR-84-08004
CONTRACT_GRANT: NAG9-55
Distribution Limits
Public
Copyright
Other

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