Nature of very small grains - PAH molecules or silicates?

Details Nature of very small grains - PAH molecules or silicates? Nature of very small grains - PAH molecules or silicates?

Apr 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986a%26a...159..328d&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 159, no. 1-2, April 1986, p. 328-330.

Astronomy and Astrophysics

Astrophysics

35

Aromatic Compounds, Cosmic Dust, Cyclic Hydrocarbons, Graphite, Interstellar Matter, Silicates, Grains, Infrared Spectra, Interstellar Radiation

Scientific paper

The predictions of the model of Puget et al. (1985) for the emission from very small grains (VSGs) including both graphitic (PAHs) and silicate components are compared with published 8 - 13 μm observations of astronomical sources. The VSGs are found to be mainly graphitic and an upper limit is placed on the relative mass of silicates based on lack of the 9.7 μm silicate emission feature of M82 and NGC 2023. This dissymmetry in the composition of VSGs supports the suggestion that they are formed in grain-grain collisions where the behaviors of graphite and silicate grains are expected to be quite different.

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