Interstellar polycyclic aromatic hydrocarbons and carbon in interplanetary dust particles and meteorites

Details Interstellar polycyclic aromatic hydrocarbons and carbon in interplanetary dust particles and meteorites Interstellar polycyclic aromatic hydrocarbons and carbon in interplanetary dust particles and meteorites

Jul 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987sci...237...56a&link_type=abstract

Science (ISSN 0036-8075), vol. 237, July 3, 1987, p. 56-59.

Astronomy and Astrophysics

Astronomy

91

Aromatic Compounds, Carbon, Cyclic Hydrocarbons, Interplanetary Dust, Interstellar Matter, Meteoritic Composition, Astronomical Spectroscopy, Emission Spectra, Infrared Spectra, Particles, Raman Spectra, Stellar Envelopes, Interplanetary Dust, Meteorites, Hydrocarbons, Carbon, Composition, Spectra, Infrared, Wavelengths, Emissions, Optical Properties, Color, Luminescence, Amorphous Material, Carbonaceous Material, Deuterium, Element Ratios, Comparisons, Enrichment, Radiation, Source, Origin, Samples, Extrat

Scientific paper

Raman 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.

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