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Interstellar Polycyclic Aromatic Hydrocarbons and Carbon in Interplanetary Dust Particles and Meteorites

Allamandola, L. J., Sandford, S. A., Wopenka, B.·1987·Science

Abstract

Both interplanetary dust particles (IDPs) and meteorites may contain material that is similar to polycyclic aromatic hydrocarbons (PAHs). The Raman spectra of IDPs and meteorites show features that are similar in position and relative strength to interstellar infrared emission features that have been attributed to vibrational transitions in free, molecular-sized PAHs. The Raman spectra of some IDPs also show red photoluminescence that is similar to the excess red emission seen in some astronomical objects and that has also been attributed to PAHs and hydrogenated amorphous carbon. Moreover, a part of the carbonaceous phase in IDPs and meteorites contains deuterium to hydrogen ratios that are greater than those for terrestrial samples. Deuterium enrichment is expected in small free PAHs that are exposed to ultraviolet radiation in the interstellar medium. Taken together, these observations suggest that some of the carbonaceous material in IDPs and meteorites may have been produced in circumstellar dust shells and only slightly modified in interstellar space.

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Metadata

Authors
Allamandola, L. J., Sandford, S. A., & Wopenka, B.
Venue
Science
Published
1987-07-03
Volume
237
Issue
4810
Pages
56-59
ISSN
  • 0036-8075 (ISSN-L)
  • 1095-9203
OpenAlex
W2012468705
Cited by
218
References
0
FWCI
23.29
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Interstellar Polycyclic Aromatic Hydrocarbons and Carbon in Interplanetary Dust Particles and Meteorites. https://app.cochat.ai/papers/10.1126/science.237.4810.56
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Allamandola, L. J., Sandford, S. A., & Wopenka, B. (1987). Interstellar Polycyclic Aromatic Hydrocarbons and Carbon in Interplanetary Dust Particles and Meteorites. Science. https://doi.org/10.1126/science.237.4810.56

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